阅读说明：本技术 天线单元和电子设备 (Antenna unit and electronic device ) 是由 余冬 刘珂鑫 周圆 王汉阳 应李俊 吴鹏飞 李建铭 侯猛 于 2020-04-22 设计创作，主要内容包括：本申请提供一种天线单元和电子设备。通过两个馈源分别激励起任意一个天线单元中的同一环形天线的C模端口的信号和D模端口的信号,且基于该天线单元的电对称设置,使得C模端口的信号在D模端口处自我抵消,使得D模端口的信号在C模端口处自我抵消,实现了两个端口间的信号隔离干扰能够自相消,还使得C模端口的信号和D模端口的信号在不同的辐射方向上能够相互互补,从而基于同一环形天线实现两个具有隔离度高且包络相关系数ECC低的天线,不仅保障了良好的天线性能,使得电子设备在有限的空间内能够充分利用天线单元实现各种场景,提升了天线空间的利用率。(The application provides an antenna unit and an electronic device. The signal of the C-mode port and the signal of the D-mode port of the same annular antenna in any one antenna unit are excited by the two feed sources respectively, and the signals are arranged symmetrically based on the electricity of the antenna unit, so that the signals of the C-mode port are self-cancelled at the D-mode port, the signals of the D-mode port are self-cancelled at the C-mode port, the signal isolation interference between the two ports can be self-cancelled, the signals of the C-mode port and the signals of the D-mode port can be mutually complemented in different radiation directions, two ECC (error correction code) antennas with high isolation and low envelope correlation coefficient are realized based on the same annular antenna, good antenna performance is ensured, the antenna unit can be fully utilized by electronic equipment in a limited space to realize various scenes, and the utilization rate of the antenna space is improved.)

1. An antenna unit, comprising: the feed source comprises a first annular branch knot, a first feed source and a second feed source;

the first annular branch segment comprises: a first radiating section, a second radiating section and a third radiating section;

the first radiation section is annular and is not closed, one end of the first radiation section is connected with the second radiation section, and the other end of the first radiation section is connected with the third radiation section;

the second radiation section and the third radiation section are symmetrically arranged along a first direction, an opening is formed between the second radiation section and the third radiation section, and the second radiation section and the third radiation section are both grounded;

the first feed source is symmetrically connected with the first radiation section along the first direction;

the second contact point and the third contact point are symmetrical along the first direction, the distance between the second contact point and the third contact point is within a first preset range, the second contact point is the contact point of the second feed source and the second radiation section, and the third contact point is the contact point of the second feed source and the third radiation section.

2. The antenna unit of claim 1,

the second radiating section and the third radiating section are arranged inside the first radiating section along the first direction; alternatively, the first and second electrodes may be,

the second radiating section and the third radiating section are arranged outside the first radiating section along the first direction; alternatively, the first and second electrodes may be,

the second radiating section and the third radiating section are arranged to extend from the inside of the first radiating section to the outside of the first radiating section along the first direction; alternatively, the first and second electrodes may be,

the second radiating section and the third radiating section are disposed to extend from an inside of the first radiating section to an outside of the first radiating section in a direction opposite to the first direction.

3. The antenna unit of claim 1 or 2, wherein the second radiating section is connected to N first grounding points of an electronic device, wherein the third radiating section is connected to N second grounding points of the electronic device, and wherein N is a positive integer.

4. The antenna unit of claim 3, wherein the first and second grounding points are disposed on a support or a printed circuit board of the electronic device with the second and third radiating segments disposed on the support.

5. The antenna element of claim 1 or 2, wherein the second radiating segment and the third radiating segment are each connected to a ground region of an electronic device, the ground regions being symmetrically arranged along the first direction.

6. The antenna unit of any one of claims 1-5, wherein said first feed has a first contact point with said first radiating section, said first contact point being a point of symmetry of said first radiating section and being located on said first radiating section.

7. The antenna unit of any one of claims 1-5, wherein there are an even number P of first contact points between the first feed and the first radiating section, the even number P of first contact points are symmetrically arranged along the first direction, and the even number P of first contact points are located on a radiating section of the first radiating section where the symmetric point of the first radiating section is located.

8. The antenna unit of any one of claims 1-5, wherein there are an odd number Q of first contact points between the first feed and the first radiating section, and the odd number Q is greater than or equal to 3, the odd number Q of first contact points comprising: the first contact point is a symmetrical point of the first radiation section and is located on the first radiation section, the even number P of first contact points are symmetrically arranged along the first direction, and the even number P of first contact points are located on the radiation section where the symmetrical point of the first radiation section is located in the first radiation section.

9. An antenna unit according to any of claims 6-8, characterized in that a first matching component is arranged between the first feed and the first contact point.

10. An antenna unit according to any of claims 1-9, characterized in that a second matching component is arranged between the second feed and the second contact point and/or that a second matching component is arranged between the second feed and the third contact point.

11. The antenna unit of any one of claims 1-10, further comprising: a first non-conductive support, a first conductive member, and a second conductive member;

the first conductive piece and the second conductive piece are arranged in a suspended mode through the first non-conductive supporting piece, the first conductive piece and the second conductive piece are symmetrically arranged in the first direction, the length of the first conductive piece is 1/2 wavelengths, the length of the second conductive piece is 1/2 wavelengths, and the wavelengths correspond to any frequency point in the working frequency band of the antenna unit.

12. The antenna unit of claim 11, wherein the first and second conductive members are disposed outside or inside the first radiating section.

13. The antenna unit of claim 11 or 12, wherein the first non-conductive support comprises at least one of a glass battery cover, a plastic battery cover, or an explosion proof membrane in an electronic device.

14. An antenna unit, comprising: the second annular branch, the feed branch, the third feed source and the fourth feed source;

the second annular branch knot comprises: a fourth radiating section, a fifth radiating section and a sixth radiating section;

the fourth radiation section is annular and is not closed, one end of the fourth radiation section is connected with the fifth radiation section, and the other end of the fourth radiation section is connected with the sixth radiation section;

the fifth radiation section and the sixth radiation section are symmetrically arranged along a second direction, an opening is formed between the fifth radiation section and the sixth radiation section, and the fifth radiation section and the sixth radiation section are both grounded;

the feeding branches are symmetrically arranged along the second direction, and the area of the feeding branches facing the fifth radiation section is equal to the area of the feeding branches facing the sixth radiation section;

the third feed source is symmetrically connected with the feed branch along the second direction;

a fifth contact point and a sixth contact point are symmetrical along the second direction, and the distance between the fifth contact point and the sixth contact point is within a second preset range, the fifth contact point is a contact point of the fourth feed source and the fifth radiation section, and the sixth contact point is a contact point of the fourth feed source and the sixth radiation section.

15. The antenna unit of claim 14,

the fifth radiating segment and the sixth radiating segment are disposed inside the fourth radiating segment along the second direction; alternatively, the first and second electrodes may be,

the fifth radiating segment and the sixth radiating segment are disposed outside the fourth radiating segment along the second direction; alternatively, the first and second electrodes may be,

the fifth radiating segment and the sixth radiating segment are arranged to extend from an interior of the fourth radiating segment to an exterior of the fourth radiating segment along the second direction; alternatively, the first and second electrodes may be,

the fifth radiating section and the sixth radiating section are disposed to extend from an interior of the fourth radiating section to an exterior of the fourth radiating section in a direction opposite the second direction.

16. The antenna unit of claim 14 or 15, wherein the fifth radiating section is connected to M third grounding points of an electronic device, wherein the sixth radiating section is connected to M fourth grounding points of the electronic device, and wherein M is a positive integer.

17. The antenna unit of claim 16, wherein the third and fourth grounding points are disposed on the bracket or a printed circuit board of the electronic device with the fifth and sixth radiating segments disposed on the bracket.

18. The antenna unit according to claim 14 or 15, wherein the fifth radiating segment and the sixth radiating segment are both connected to a ground area of an electronic device, and the ground areas are symmetrically arranged along the second direction.

19. The antenna unit of any of claims 14-18,

the feeding branch is arranged inside the fourth radiation section along the second direction; alternatively, the first and second electrodes may be,

the feeding branch is arranged outside the fourth radiation section along the second direction; alternatively, the first and second electrodes may be,

the feed branch extends from the inside of the fourth radiation section to the outside of the fourth radiation section along the second direction.

20. The antenna unit of any of claims 14-19,

the area of the feed branch node facing the fifth radiation section along the second direction is equal to the area of the feed branch node facing the sixth radiation section along the second direction; alternatively, the first and second electrodes may be,

the area of the feed branch node facing the fifth radiation section in the vertical direction of the second direction is equal to the area of the feed branch node facing the sixth radiation section in the vertical direction of the second direction.

21. The antenna element of any of claims 14-20, wherein there is at least one fourth contact point between said third feed and said feed stub.

22. The antenna unit of claim 21, wherein a third matching component is disposed between the third feed and the fourth contact point.

23. An antenna unit according to any of claims 14-22, characterized in that a fourth matching component is arranged between the fourth feed and the fifth contact point and/or that a fourth matching component is arranged between the fourth feed and the sixth contact point.

24. The antenna unit of any one of claims 14-23, further comprising: a second non-conductive support, a third conductive member, and a fourth conductive member;

the third electrically conductive piece with the fourth electrically conductive piece passes through second non-conductive support piece suspension sets up, just the third electrically conductive piece with the fourth electrically conductive piece is followed the second direction symmetry sets up, the length of the third electrically conductive piece is 1/2 wavelengths, the length of the fourth electrically conductive piece is 1/2 wavelengths, the wavelength is the wavelength that any frequency point corresponds in the operating band of antenna unit.

25. The antenna unit of claim 24, wherein the third conductive element and the fourth conductive element are disposed outside or inside the fourth radiating section.

26. The antenna unit of claim 24 or 25, wherein the second non-conductive support comprises at least one of a glass battery cover, a plastic battery cover, or an explosion proof membrane in an electronic device.

27. An electronic device, comprising: a printed circuit board and at least one antenna unit according to any of claims 1-13, and/or a printed circuit board and at least one antenna unit according to any of claims 14-26.

Technical Field

The present application relates to the field of electronic technologies, and in particular, to an antenna unit and an electronic device.

Background

With the development of the full-face screen of the electronic equipment, the space of the antenna is increasingly deteriorated. Meanwhile, the number of antennas is increasing as various user demands are satisfied. Therefore, how to place more antennas in a limited space and ensure that each antenna has good isolation and envelope correlation coefficient ECC is an urgent problem to be solved.

Disclosure of Invention

The application provides an antenna unit and electronic equipment to realize two antennas that have the isolation height and envelope correlation coefficient ECC is low based on same loop antenna, not only ensured good antenna performance, still promoted the utilization ratio in antenna space.

In a first aspect, the present application provides an antenna unit comprising: the feed source comprises a first annular branch knot, a first feed source and a second feed source; the first annular branch segment includes: a first radiating section, a second radiating section and a third radiating section; the first radiation section is annular and is not closed, one end of the first radiation section is connected with the second radiation section, and the other end of the first radiation section is connected with the third radiation section; the second radiation section and the third radiation section are symmetrically arranged along the first direction, an opening is formed between the second radiation section and the third radiation section, and the second radiation section and the third radiation section are both grounded; the first feed source is symmetrically connected with the first radiation section along a first direction; the second contact point and the third contact point are symmetrical along the first direction, the distance between the second contact point and the third contact point is within a first preset range, the second contact point is a contact point of the second feed source and the second radiation section, and the third contact point is a contact point of the second feed source and the third radiation section.

With the antenna unit provided in the first aspect, the antenna unit is based on a symmetrical layout of the same loop antenna (i.e. the first loop branch), the signals of the C-mode port and the D-mode port of the loop antenna are respectively excited by two feed sources, so that the signal of the C-mode port is self-offset at the D-mode port, the signal of the D-mode port is self-offset at the C-mode port, the signal isolation between the two ports is realized, the signal of the C-mode port and the signal of the D-mode port are mutually complementary in different radiation directions, thereby realizing two antennas with high isolation and low ECC, not only ensuring good antenna performance, the antenna unit can be fully utilized to realize various scenes in the limited space of the electronic equipment, and the electronic equipment can also comprise more antennas in the limited space, so that the utilization rate of the antenna space is improved.

In one possible design, the second radiation section and the third radiation section are arranged inside the first radiation section along the first direction, so that the antenna unit is conveniently arranged in a smaller space, and the space utilization rate of the antenna unit is improved; or the second radiation section and the third radiation section are arranged outside the first radiation section along the first direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation; or the second radiation section and the third radiation section extend from the inside of the first radiation section to the outside of the first radiation section along the first direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation; alternatively, the second radiating section and the third radiating section extend from the inside of the first radiating section to the outside of the first radiating section in the opposite direction of the first direction, providing a possibility for implementing the antenna unit so that the antenna unit can meet the space requirement of the actual situation.

In one possible design, the second radiating section is connected to N first grounding points of the electronic device, the third radiating section is connected to N second grounding points of the electronic device, and N is a positive integer.

In one possible design, in the case that the second radiation section and the third radiation section are arranged on the bracket, the first grounding point and the second grounding point are arranged on the bracket, so that the first grounding point and the second grounding point need to be respectively connected with the ground of the printed circuit board through elastic pins on the bracket, and wiring does not need to be arranged on the bracket; or the first grounding point and the second grounding point are arranged on a printed circuit board of the electronic equipment, so that elastic pins are saved, and the scheme is simple and easy to realize.

In one possible design, the second radiating section and the third radiating section are both connected to a ground region of the electronic device, and the ground regions are symmetrically arranged along the first direction.

In one possible design, the first feed source has a first contact point with the first radiation section, and the first contact point is a symmetrical point of the first radiation section and is located on the first radiation section.

In a possible design, an even number P of first contact points are arranged between the first feed source and the first radiation section, the even number P of first contact points are symmetrically arranged along the first direction, and the even number P of first contact points are located on the radiation section where the symmetric points of the first radiation section are located in the first radiation section.

In one possible design, there are an odd number Q of first contact points between the first feed and the first radiating section, and the odd number Q is greater than or equal to 3, and the odd number Q of first contact points include: the first radiation section comprises a first contact point and P even number of first contact points, wherein the first contact point is a symmetrical point of the first radiation section and is positioned on the first radiation section, the P even number of first contact points are symmetrically arranged along the first direction, and the P even number of first contact points are positioned on the radiation section where the symmetrical point of the first radiation section in the first radiation section is positioned.

In one possible design, a first matching component is arranged between the first feed source and the first contact point so as to adjust the frequency band of the antenna unit, so that the first feed source can obtain better directional diagram and cross polarization performance, and the performance of the antenna unit is improved.

In one possible design, a second matching component is provided between the second feed and the second contact point, and/or a second matching component is provided between the second feed and the third contact point. This is done to adjust the frequency band of the antenna unit so that the second feed can get better pattern and cross polarization performance, thereby improving the performance of the antenna unit.

In one possible design, the antenna unit further includes: a first non-conductive support, a first conductive member, and a second conductive member; the first conductive piece and the second conductive piece are arranged in a suspended mode through the first non-conductive supporting piece, the first conductive piece and the second conductive piece are symmetrically arranged along the first direction, the length of the first conductive piece is 1/2, the length of the second conductive piece is 1/2, and the wavelength is the wavelength corresponding to any frequency point in the working frequency band of the antenna unit. Therefore, the first conductive piece and the second conductive piece which are conductive can widen the bandwidth of the antenna unit and improve the performance of the antenna unit. Generally, the wider the widths of the first and second conductive members, the better the performance of the antenna unit.

In one possible embodiment, the first and second electrically conductive elements are arranged outside or inside the first radiating section.

In one possible design, the first non-conductive support comprises at least one of a glass battery cover, a plastic battery cover, or an explosion proof membrane in the electronic device.

In a second aspect, the present application provides an antenna unit comprising: the second annular branch, the feed branch, the third feed source and the fourth feed source; the second annular branch knot comprises: a fourth radiating section, a fifth radiating section and a sixth radiating section; the fourth radiation section is annular and is not closed, one end of the fourth radiation section is connected with the fifth radiation section, and the other end of the fourth radiation section is connected with the sixth radiation section; the fifth radiation section and the sixth radiation section are symmetrically arranged along the second direction, an opening is formed between the fifth radiation section and the sixth radiation section, and the fifth radiation section and the sixth radiation section are both grounded; the feeding branches are symmetrically arranged along the second direction, and the area of the feeding branches facing the fifth radiation section is equal to the area of the feeding branches facing the sixth radiation section; the third feed source is symmetrically connected with the feed branch along a second direction; the fifth contact point and the sixth contact point are symmetrical along the second direction, the distance between the fifth contact point and the sixth contact point is within a second preset range, the fifth contact point is a contact point of the fourth feed source and the fifth radiation section, and the sixth contact point is a contact point of the fourth feed source and the sixth radiation section.

With the antenna element provided in the second aspect, the antenna element is based on the symmetrical layout of the same loop antenna (i.e. the second loop branch and the feed branch), the signals of the C-mode port and the D-mode port of the loop antenna are respectively excited by two feed sources, so that the signal of the C-mode port is self-offset at the D-mode port, the signal of the D-mode port is self-offset at the C-mode port, the signal isolation between the two ports is realized, the signal of the C-mode port and the signal of the D-mode port are mutually complementary in different radiation directions, thereby realizing two antennas with high isolation and low ECC, not only ensuring good antenna performance, the antenna unit can be fully utilized to realize various scenes in the limited space of the electronic equipment, and the electronic equipment can also comprise more antennas in the limited space, so that the utilization rate of the antenna space is improved.

In a possible design, the fifth radiation section and the sixth radiation section are arranged inside the fourth radiation section along the second direction, so that the antenna unit is conveniently arranged in a smaller space, and the space utilization rate of the antenna unit is improved; or the fifth radiation section and the sixth radiation section are arranged outside the fourth radiation section along the second direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation; or the fifth radiation section and the sixth radiation section extend from the inside of the fourth radiation section to the outside of the fourth radiation section along the second direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation; alternatively, the fifth radiating section and the sixth radiating section extend from the inside of the fourth radiating section to the outside of the fourth radiating section in the direction opposite to the second direction, so that a possibility is provided for implementing the antenna unit, so that the antenna unit can meet the space requirement of the actual situation.

In one possible design, the fifth radiating section is connected to M third grounding points of the electronic device, and the sixth radiating section is connected to M fourth grounding points of the electronic device, where M is a positive integer.

In one possible design, in the case that the fifth radiation section and the sixth radiation section are arranged on the bracket, the third grounding point and the fourth grounding point are arranged on the bracket, so that the third grounding point and the fourth grounding point need to be respectively connected with the ground of the printed circuit board through elastic pins on the bracket, and wiring does not need to be arranged on the bracket; or the third grounding point and the fourth grounding point are arranged on the printed circuit board of the electronic equipment, so that elastic pins are saved, and the scheme is simple and easy to realize.

In one possible design, the fifth radiating section and the sixth radiating section are both connected to a ground area of the electronic device, and the ground areas are symmetrically arranged along the second direction.

In a possible design, the feed branch is arranged inside the fourth radiation section along the second direction, so that the internal space of the fourth radiation section can be fully utilized, the arrangement of the feed branch, the fifth radiation section and the sixth radiation section is realized, the antenna unit is conveniently distributed in a smaller space, and the space utilization rate of the antenna unit is improved; or the feeding branch is arranged outside the fourth radiation section along the second direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation; or the feeding branch extends from the inside of the fourth radiation section to the outside of the fourth radiation section along the second direction, so that a possibility is provided for realizing the antenna unit, and the antenna unit can meet the space requirement of the actual situation.

In a possible design, the area of the feed branch facing the fifth radiation section along the second direction is equal to the area of the feed branch facing the sixth radiation section along the second direction; or the area of the feed branch node facing the fifth radiation section along the vertical direction of the second direction is equal to the area of the feed branch node facing the sixth radiation section along the vertical direction of the second direction. Thus, the symmetry of the feed branches is ensured.

In one possible design, there is at least one fourth contact point between the third feed and the feed stub.

In a possible design, a third matching component is arranged between the third feed source and the fourth contact point so as to adjust the frequency band of the antenna unit, so that the third feed source can obtain better directional diagram and cross polarization performance, and the performance of the antenna unit is improved.

In one possible design, a fourth matching component is disposed between the fourth feed and the fifth contact point, and/or a fourth matching component is disposed between the fourth feed and the sixth contact point. This is done to adjust the frequency band of the antenna unit so that the fourth feed can get better pattern and cross polarization performance, thereby improving the performance of the antenna unit.

In one possible design, the antenna unit further includes: a second non-conductive support, a third conductive member, and a fourth conductive member; the third conductive piece and the fourth conductive piece are arranged in a suspended mode through the second non-conductive supporting piece and symmetrically arranged along the second direction, the third conductive piece is 1/2 long in length, the fourth conductive piece is 1/2 long in length, and the wavelength is the wavelength corresponding to any frequency point in the working frequency band of the antenna unit. Therefore, the third conductive piece and the fourth conductive piece which are conductive can widen the bandwidth of the antenna unit and improve the performance of the antenna unit. Generally, the wider the widths of the third conductive member and the fourth conductive member, the better the performance of the antenna unit.

In one possible design, the third conductive element and the fourth conductive element are disposed outside or inside the fourth radiating section.

In one possible design, the second non-conductive support comprises at least one of a glass battery cover, a plastic battery cover, or an explosion proof membrane in the electronic device.

In a third aspect, the present application provides an electronic device, comprising: the printed circuit board and the antenna element of any one of the possible designs of the first aspect and the first aspect, and/or the printed circuit board and the antenna element of any one of the possible designs of the second aspect and the second aspect. The feed point, the tuning circuit and the matching circuit in the antenna unit are arranged on the printed circuit board, and the grounding point in the antenna unit is grounded with the printed circuit board.

The beneficial effects of the electronic device provided in the third aspect and each possible design of the third aspect may refer to the beneficial effects of each possible implementation manner of the first aspect and/or the second aspect, and are not described herein again.

Drawings

FIG. 1 is a current distribution diagram of a loop antenna having a perimeter of one wavelength λ;

FIG. 2 is a waveform diagram illustrating the input reflection coefficient S11 of the loop antenna of FIG. 1 at different operating frequency bands;

fig. 3a is a schematic diagram illustrating a shape of a first radiation section/a fourth radiation section in an antenna unit according to an embodiment of the present application;

fig. 3b is a schematic diagram illustrating a shape of a first radiation section/a fourth radiation section in an antenna unit according to an embodiment of the present application;

fig. 3c is a schematic diagram illustrating a shape of a first radiation section/a fourth radiation section in an antenna unit according to an embodiment of the present application;

fig. 3d is a schematic diagram illustrating a shape of a first radiation section/a fourth radiation section in an antenna unit according to an embodiment of the present application;

fig. 3e is a schematic diagram illustrating a shape of a first radiation section/a fourth radiation section in an antenna unit according to an embodiment of the present application;

fig. 4a is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 4b is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 4c is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 4d is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 4e is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 4f is a schematic diagram of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit provided in an embodiment of the present application;

fig. 5a is a schematic diagram illustrating a grounding manner of a second radiation segment and a third radiation segment or a fifth radiation segment and a sixth radiation segment in an antenna unit according to an embodiment of the present application;

fig. 5b is a schematic diagram illustrating a grounding manner of the second radiation section and the third radiation section or the fifth radiation section and the sixth radiation section in the antenna unit according to an embodiment of the present application;

fig. 5c is a schematic diagram illustrating a grounding manner of the second radiation section and the third radiation section or the fifth radiation section and the sixth radiation section in the antenna unit according to an embodiment of the present application;

fig. 6a is a schematic diagram illustrating a first feed connected to a first radiating segment along a first direction in an antenna unit according to an embodiment of the present application;

fig. 6b is a schematic diagram illustrating a first feed connected to a first radiating segment along a first direction in an antenna unit according to an embodiment of the present application;

fig. 6c is a schematic diagram illustrating a first feed connected to a first radiating segment along a first direction in an antenna unit according to an embodiment of the present application;

fig. 7a is a schematic diagram illustrating a second feed connected to a second radiation segment and a third radiation segment respectively in an antenna unit according to an embodiment of the present application;

fig. 7b is a schematic diagram illustrating a second feed connected to a second radiation section and a third radiation section respectively in an antenna unit according to an embodiment of the present application;

fig. 8a is a schematic shape diagram of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 8b is a schematic shape diagram of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 8c is a schematic diagram illustrating a shape of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 9a is a schematic shape diagram of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 9b is a schematic diagram illustrating a shape of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 9c is a schematic diagram illustrating a shape of a first conductive member, a second conductive member, a third conductive member, or a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 10a is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

fig. 10b is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

fig. 10c is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

fig. 10d is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

fig. 10e is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

fig. 10f is a schematic diagram illustrating positions of a first conductive member and a second conductive member in an antenna unit according to an embodiment of the present application;

FIG. 11a is a schematic diagram of an overall structure of an electronic device;

fig. 11b is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

fig. 11c is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

fig. 11d is a schematic waveform diagram of S parameters of the first feed and the second feed in fig. 11b and 11c in different operating frequency bands;

FIG. 11e is a waveform illustrating the system efficiency and radiation efficiency of the first and second feeds of FIGS. 11b and 11c, respectively;

fig. 12a is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 12b is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 12c is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 12d is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 12e is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 12f is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13a is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13b is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13c is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13d is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13e is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 13f is a schematic diagram of a feed branch in an antenna unit according to an embodiment of the present application;

fig. 14a is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 14b is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 14c is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 14d is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 14e is a schematic diagram of a feeding branch in an antenna unit according to an embodiment of the present application;

fig. 14f is a schematic diagram of a feed branch in an antenna unit according to an embodiment of the present application;

fig. 15a is a schematic diagram illustrating a third feed source in an antenna unit symmetrically connected to a feed branch along a second direction according to an embodiment of the present application;

fig. 15b is a schematic diagram illustrating that a third feed in the antenna unit is symmetrically connected to the feed branch along the second direction according to the embodiment of the present application;

fig. 16a is a schematic diagram illustrating that a fourth feed is connected to a fifth radiation segment and a sixth radiation segment respectively in an antenna unit according to an embodiment of the present application;

fig. 16b is a schematic diagram illustrating that a fourth feed is connected to a fifth radiation segment and a sixth radiation segment respectively in an antenna unit according to an embodiment of the present application;

fig. 17a is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 17b is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 17c is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 17d is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 17e is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 17f is a schematic diagram illustrating positions of a third conductive member and a fourth conductive member in an antenna unit according to an embodiment of the present application;

fig. 18a is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

FIG. 18b is a schematic waveform diagram of S parameters of the third feed and the fourth feed in FIG. 18a in different operating frequency bands;

FIG. 18c is a waveform illustrating the system efficiency and radiation efficiency of each of the third feed and the fourth feed of FIG. 18 a;

FIG. 18d is a current distribution diagram for the antenna element of FIG. 18 a;

FIG. 18e is a current distribution diagram of the antenna element of FIG. 18 a;

FIG. 18f is a current distribution diagram for the antenna element of FIG. 18 a;

FIG. 18g is a current distribution diagram for the antenna element of FIG. 18 a;

FIG. 18h is a current distribution diagram for the antenna unit of FIG. 18 a;

FIG. 18i is a current distribution diagram for the antenna element of FIG. 18 a;

fig. 19a is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

FIG. 19b is a schematic waveform diagram of S parameters of the third feed and the fourth feed in FIG. 19a in different operating frequency bands;

FIG. 19c is a waveform illustrating the system efficiency and radiation efficiency of the third feed and the fourth feed, respectively, of FIG. 19 a;

FIG. 19d is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19e is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19f is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19g is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19h is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19i is a current distribution diagram of the antenna element of FIG. 19 a;

FIG. 19j is a current distribution diagram of the antenna element of FIG. 19 a;

fig. 20a is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

fig. 20b is a schematic waveform diagram of the S parameter of the third feed and the fourth feed in fig. 20a at different operating frequency bands;

FIG. 20c is a waveform illustrating the system efficiency and radiation efficiency of the third feed and the fourth feed, respectively, of FIG. 20 a;

FIG. 20d is a current distribution diagram for the antenna element of FIG. 20 a;

figure 20e is a current distribution diagram for the antenna element of figure 20 a;

FIG. 20f is a current distribution diagram for the antenna element of FIG. 20 a;

FIG. 20g is a current distribution diagram for the antenna element of FIG. 20 a;

FIG. 20h is a current distribution diagram for the antenna element of FIG. 20 a;

FIG. 20i is a current distribution diagram for the antenna element of FIG. 20 a;

fig. 21a is a schematic view of a topology of an antenna unit according to an embodiment of the present application;

fig. 21b is a schematic waveform diagram of S parameters of the third feed and the fourth feed in fig. 21a in different operating frequency bands;

fig. 21c is a waveform diagram illustrating the system efficiency and the radiation efficiency of the third feed and the fourth feed of fig. 21a, respectively.

Description of reference numerals:

10-a first annular branch; 11 — a first radiating section; 12 — a second radiating section; 13-a third radiating section; 14-a first electrically non-conductive support; 15-a first electrically conductive member; 16 — a second electrically conductive member; f1 — first feed; f2 — second feed; x1 — first direction;

20-second ring-shaped branch; 21-a fourth radiation section; 22-a fifth radiating section; 23-a sixth radiating section; 24-a second electrically non-conductive support; 25-a third conductive member; 26-a fourth conductive member; 27-a feed branch; f3 — third feed; f4 — fourth feed; x2-second direction.

Detailed Description

First, some terms in the present application are explained below to facilitate understanding by those skilled in the art.

1. Loop antenna (loop antenna): a metal wire is wound into a certain shape, such as a circle, a square, a triangle, a rhombus and the like, and two ends of a conductor are used as output ends.

Fig. 1 shows a current distribution diagram of a loop antenna having a circumference of one wavelength λ. For convenience of illustration, the loop antenna is illustrated as a square in fig. 1. As shown in fig. 1, a thick black line represents a loop antenna, one end of the loop antenna is connected to a feed (feed), the other end of the loop antenna is connected to a ground, each arrow represents a current distribution of the loop antenna at a frequency corresponding to one wavelength λ, the current of the loop antenna is minimum at a position of a triangle, and the current of the loop antenna is maximum at a position of a solid circle.

Fig. 2 shows a waveform diagram of the input reflection coefficient S11 of the loop antenna of fig. 1 at different operating frequency bands. As shown in fig. 2, curve 1 and curve 2 represent S11 of the loop antenna in fig. 1 at different operating frequency bands, respectively, and the loop antenna in curve 1 and curve 2 has rich high-order modes, so that the loop antenna has the advantages of easy debugging, capability of covering a wide medium-high frequency bandwidth, and the like.

In fig. 2, the abscissa is frequency in GHz, the ordinate is input reflection coefficient S11 in dB, and input reflection coefficient S11 is one of S parameters (i.e., scattering parameters) representing return loss characteristics, and the dB value of loss and impedance characteristics thereof are generally viewed by a network analyzer. The parameter indicates that the matching degree of the antenna and the front-end circuit is not good, and the larger the value of the reflection coefficient S11 is, the larger the energy reflected by the antenna is, so that the matching of the antenna is worse. For example, the S11 value of antenna a at a certain frequency point is-1, the S11 value of antenna B at the same frequency point is-3, and antenna B has better matching degree than antenna a.

2. Antenna isolation: refers to the ratio of the signal transmitted by one antenna to the signal power received by another antenna. The antenna isolation is typically expressed using a reverse transmission coefficient S12. Wherein the reverse transmission coefficient S12 is one of the S parameters.

3. Envelope correlation coefficient ECC: for representing the coupling between different antennas, here the coupling may include: three types of current coupling, free space coupling and surface wave coupling. As will be appreciated by those skilled in the art, isolation is an important measure of coupling between antennas. Generally, by reducing the three coupling effects, the isolation between the antennas can be increased, and a sufficiently low ECC can be ensured to maintain a better antenna performance.

Those skilled in the art will appreciate that an antenna may be fed separately to produce currents of equal amplitude and in phase, i.e., common mode (C-mode) port signals. One antenna can be fed separately, producing currents of equal amplitude and opposite phase, i.e. signals at the differential mode (D-mode) port. However, when the distance between the two antennas is short, the coupling effect between the two antennas increases with decreasing distance due to the coupling capacitance between the two antennas. Therefore, when the distance between the two antennas is small, the coupling effect between the two antennas is large, so that the isolation between the two antennas is reduced, and the ECC between the two antennas is also high.

In order to solve the above problems, the present application provides an antenna unit and an electronic device, wherein two feed sources respectively excite a signal of a C-mode port and a signal of a D-mode port of a same loop antenna in any one antenna unit, and based on an electrically symmetric arrangement of the antenna unit, the signal of the C-mode port is self-cancelled at the D-mode port, so that the signal of the D-mode port is self-cancelled at the C-mode port, thereby realizing signal isolation between the two ports, and further enabling the signal of the C-mode port and the signal of the D-mode port to be mutually complementary in different radiation directions, thereby realizing two antennas with high isolation and low envelope correlation coefficient ECC based on the same loop antenna, not only ensuring good antenna performance, and enabling the electronic device to fully utilize the antenna unit in a limited space to realize various scenarios, such as diversity application to an antenna or a multiple-input multiple-output (multiple-output, MIMO) antenna and other multi-antenna scenes, directional diagram synthesis scenes, directional diagram switching scenes such as horizontal-vertical switching and the like, and the electronic equipment can contain more antennas in a limited space, so that the utilization rate of the antenna space is improved.

Among them, the electronic devices mentioned in this application may include but are not limited to: a mobile phone, an earphone, a tablet computer, a portable computer, a wearable device or a data card.

Wherein the antenna elements are arranged electrically symmetrically. An electrically symmetrical arrangement of the antenna elements is to be understood as an antenna element having an electrical symmetry center, which generally corresponds to a physical symmetry center. The two sides of the antenna element with respect to this electrically symmetric center are approximately mirror-equal in electrical size. If the environment surrounding the antenna element is perfectly symmetrical, the antenna element is electrically, i.e. physically, symmetrical. If an asymmetric device is introduced into the surrounding environment of the antenna unit, the antenna unit needs to be set to be an asymmetric structure to counteract the asymmetry introduced by the device, so that the electrical symmetry of the antenna unit is realized. For convenience of explanation, the present application is exemplified by an antenna unit having a symmetrical structure and an environment around the antenna unit having a symmetrical structure.

The feed mode of the feed source excitation loop antenna is not limited in the application. Therefore, in the present application, a scenario in which the feed source excites the loop antenna in a direct feed manner may be set as the first embodiment, and a scenario in which the feed source excites the loop antenna in a feed manner similar to a coplanar waveguide (CPW) may be set as the second embodiment.

For convenience of description, the electronic device takes a mobile phone as an example, and by combining the embodiment of the present application and the drawings thereof, a specific implementation process of implementing two antennas through the same loop antenna in the present application is described separately by using the first embodiment and the second embodiment.

Example one

In a first embodiment, an antenna unit of the present application may include: a first ring branch 10, a first feed F1 and a second feed F2.

The present application does not limit the manufacturing process of the first annular branch 10. For example, the first annular branch 10 may be made of a flexible printed circuit board (FPC), a laser, or a spraying process. The installation position of the first annular branch 10 is not limited in this application. For example, the first annular branch 10 may be disposed on a metal frame of an electronic device such as a mobile phone, or may be disposed on a printed circuit board of the electronic device, or may be set up on the printed circuit board of the electronic device by using a bracket.

In the present application, the first annular branch 10 may include: a first radiating section 11, a second radiating section 12 and a third radiating section 13.

Wherein the first radiating section 11 is annular. Optionally, the first radiation section 11 may be a circle as shown in fig. 3a, a square as shown in fig. 3b, an irregular shape as shown in fig. 3c to 3e, or a triangle, and the specific shape of the first radiation section 11 is not limited in this application, and it is only necessary that the first radiation section 11 is symmetrically arranged along the first direction X1. The first direction X1 refers to the direction of the symmetry axis of the first annular branch 10, and may point in any direction along with the placement direction of the first annular branch 10. For convenience of explanation, the first direction X1 in the present application is illustrated by taking the positive direction of the X axis as an example. It should be noted that the first annular branch 10 may be structurally configured to be completely symmetrical, that is, the first direction X1 is a direction in which a symmetry axis of the first annular branch 10 is located, and may also be structurally configured to be asymmetric within an error range, where the asymmetry is to eliminate electrical asymmetry introduced by other components besides the first annular branch 10, that is, the first direction X1 is a direction in which a corrected symmetry axis of the first annular branch 10 is located.

Also, the first radiating section 11 is not closed and has two ends. One end of the first radiating section 11 is connected with the second radiating section 12, and the other end of the first radiating section 11 is connected with the third radiating section 13. And the second radiation section 12 and the third radiation section 13 are symmetrically arranged along the first direction X1, and an opening is formed between the second radiation section 12 and the third radiation section 13.

The shape, width or length of the second radiation section 12 and the third radiation section 13 are not limited in this application. And the size of the opening between the second radiation section 12 and the third radiation section 13 is not limited. In addition, the relative position relationship between the second radiation section 12 and the first radiation section 11 and the relative position relationship between the third radiation section 13 and the first radiation section 12 are not limited in the present application.

Next, the arrangement of the second radiation section 12 and the third radiation section 13 will be described with reference to fig. 4a to 4f on the basis of the square first radiation section 11 shown in fig. 3 b.

Optionally, the second radiation section 12 and the third radiation section 13 may be disposed inside the first radiation section 11 along the first direction X1, so that the inner space of the first radiation section 11 can be fully utilized, the second radiation section 12 and the third radiation section 13 are disposed, the antenna unit is conveniently disposed in a smaller space, and the space utilization rate of the antenna unit is improved. The shapes of the second radiation section 12 and the third radiation section 13 based on the foregoing description may include various shapes, and are exemplified by fig. 4a, 6b and 6 c. For convenience of illustration, the second radiation section 12 and the third radiation section 13 shown in fig. 4a are elongated, and the second radiation section 12 and the third radiation section 13 shown in fig. 4b and 4c have different irregular shapes.

Alternatively, the second radiation segment 12 and the third radiation segment 13 may be arranged outside the first radiation segment 11 in the first direction X1, providing a possibility for implementing an antenna element such that the antenna element can meet the space requirements of the actual situation. The shapes of the second radiation section 12 and the third radiation section 13 based on the foregoing description may include various shapes, and are exemplified by fig. 4 d. For convenience of illustration, the second radiating section 12 and the third radiating section 13 are shown in fig. 4d as being elongated.

Alternatively, the second radiation section 12 and the third radiation section 13 may be arranged to extend from the inside of the first radiation section 11 to the outside of the first radiation section 11 along the first direction X1, providing another possibility for implementing an antenna element such that the antenna element can meet the space requirements of the actual situation. The shapes of the second radiation section 12 and the third radiation section 13 based on the foregoing description may include various shapes, and are exemplified by fig. 4 e. The second radiation section 12 and the third radiation section 13 shown in fig. 4e are in the shape of long strips.

Alternatively, the second radiation section 12 and the third radiation section 13 may extend from the inside of the first radiation section 11 to the outside of the first radiation section 11 in the opposite direction of the first direction X1, providing another possibility for implementing an antenna unit so that the antenna unit can meet the space requirement of the actual situation. The shapes of the second radiation section 12 and the third radiation section 13 based on the foregoing description may include various shapes, and are exemplified by fig. 4 f. The second radiation section 12 and the third radiation section 13 shown in fig. 4f are in the shape of long strips.

And, the second radiation section 12 and the third radiation section 13 are both grounded. The grounding manner of the second radiation section 12 and the third radiation section 13 is not limited in the present application. The grounding mode of the second radiation section 12 and the third radiation section 13 will be described with reference to fig. 5a to 5 c.

Optionally, the second radiating section 12 is connected to N first ground points of the electronic device, and the third radiating section 13 is connected to N second ground points of the electronic device, where N is a positive integer. The specific size of N is not limited in the present application. For ease of illustration, in fig. 5 a-5 c, the first and second grounding points are illustrated with ground symbols.

Taking N as an example, fig. 5a shows that, in addition to the first ring branch 10 shown in fig. 4b, the second radiating section 12 is connected to a first grounding point, and the third radiating section 13 is connected to a second grounding point.

Taking N as an example, fig. 5b shows that the second radiating section 12 is connected to two first grounding points and the third radiating section 13 is connected to two second grounding points on the basis of the first ring branch 10 shown in fig. 4 c. It should be noted that, on the basis of the first ring branch 10 shown in fig. 4c, the second radiating section 12 may also be connected to a first grounding point, and the third radiating section 13 is connected to a second grounding point.

The present application does not limit the specific implementation of the first ground point and the second ground point of the electronic device. Those skilled in the art will appreciate that the various components of the electronic device need to be common. Therefore, the first and second grounding points need to be connected to the ground of the printed circuit board in the electronic device.

When the antenna unit of the present application is manufactured by a process using a support, the second radiating section 12 and the third radiating section 13 are disposed on the support, and the first ground point and the second ground point may be disposed in various ways. In the following, two possible implementations are exemplified.

In a possible implementation, the first ground point and the second ground point may be provided on a printed circuit board. The first grounding point and the second grounding point can be the ground of the printed circuit board and do not need to be arranged separately. The first grounding point and the second grounding point can also be independently arranged and are connected with the ground of the printed circuit board through the wiring on the printed circuit board. Thus, the second radiation section 12 and the third radiation section 13 are respectively switched to the first grounding point and the second grounding point of the printed circuit board through different traces on the bracket, and the different traces on the bracket are generally symmetrically arranged along the first direction X1. By doing so, the elastic foot is saved, and the scheme is simple and easy to implement.

In another possible implementation, the first grounding point and the second grounding point may be arranged on the support such that the second radiating section 12 is connected to the first grounding point and the third radiating section 13 is connected to the second grounding point. And the first grounding point and the second grounding point need to be respectively connected with the ground of the printed circuit board through elastic pins on the bracket, and wiring does not need to be arranged on the bracket.

Alternatively, the second radiation segment 12 and the third radiation segment 13 may be connected to both ground areas of the electronic device, and the ground areas are symmetrically arranged along the first direction X1. For convenience of illustration, fig. 5c shows that the second radiation section 12 and the third radiation section 13 are respectively connected to the grounding area (the grounding area is shown by GG in fig. 5 c) on the basis of the first annular branch 10 shown in fig. 4 f.

The specific size and position of the grounding area are not limited in the application. The ground region may be disposed on a printed circuit board of the electronic device, or may be disposed as a conductive cloth connected to a ground of the electronic device, or disposed on a conductive plate connected to the ground of the electronic device below a screen of the electronic device.

In the present application, the first feed F1 is symmetrically connected to the first radiation segment 11 along the first direction X1, such that there are one or more first contact points between the first feed F1 and the first radiation segment 11. The number and the positions of the first contact points are not limited, and all the first contact points are symmetrical along the first direction X1.

In the following, on the basis of the first ring segment 10 shown in fig. 5b, and with reference to fig. 6a to 6c, three possible implementations are used to illustrate the connection of the first feed F1 with the first radiating section 11 along the first direction X1. In fig. 6a to 6c, since the first radiation segment 11 is symmetrical in the first direction X1, the symmetry axis of the first radiation segment 11 overlaps with the first direction X1.

In a possible implementation, there is a first contact point between the first feed F1 and the first radiation segment 11, and the first contact point is a symmetric point of the first radiation segment 11 and is located on the first radiation segment 11, i.e. point a in fig. 6a is the first contact point.

In another possible implementation manner, there are even P first contact points between the first feed F1 and the first radiation segment 11, the even P first contact points are symmetrically arranged along the first direction X1, and the even P first contact points are located on the radiation segment where the symmetric point of the first radiation segment 11 in the first radiation segment 11 is located.

The specific size of the even number P is not limited in the present application, and the distance between any two first contact points is not limited in the present application. For convenience of description, when the even number P is 2, as shown in fig. 6b, the point a1 and the point a2 are two first contact points, and the point a1 and the point a2 are symmetrical in the first direction X1.

In another possible implementation manner, combining the two foregoing implementation manners, there are odd number Q of first contact points between the first feed F1 and the first radiation segment 11, and the odd number Q is greater than or equal to 3. And includes one first contact point and even P first contact points at odd number Q first contact points. One of the first contact points is a symmetric point of the first radiation section 11 and is located on the first radiation section 11. The even number P of first contact points are symmetrically arranged along the first direction X1, and the even number P of first contact points are located on the radiation section where the symmetric point of the first radiation section 11 in the first radiation section 11 is located. Thus, the odd number Q of first contact points are symmetrically arranged in the first direction X1.

The specific size of the odd number Q is not limited, and the distance between any two first contact points is not limited. For convenience of description, when the odd number Q is 3, as shown in fig. 6c, the point a1, the point a2, and the point A3 are three first contact points, and the point a1, the point a2, and the point A3 are symmetrical in the first direction X1.

In addition, a first matching component may be disposed between the first feed F1 and the first contact point, so as to adjust the frequency band of the antenna unit, so that the first feed F1 may obtain better pattern and cross polarization performance, thereby improving the performance of the antenna unit. The specific implementation form of the first matching component is not limited in the present application. For example, the first matching component may be a capacitor, an inductor, a capacitor and a switch, an inductor and a switch, or a capacitor, an inductor and a switch, etc. The capacitance value and the quantity of the capacitor, the inductance value and the quantity of the inductor, the type and the quantity of the switch or the connection relation of any two of the capacitor, the inductor and the switch are not limited by the application.

In the present application, the second feed F2 is connected to both the second radiation segment 12 and the third radiation segment 13, and the contact point of the second feed F2 with the second radiation segment 12 is referred to as a second contact point, the contact point of the second feed F2 with the second radiation segment 12 is referred to as a third contact point, and the second contact point and the third contact point are symmetrical along the first direction X1.

And, the second contact point is set up in the second radiation section 12 and is set up in the arbitrary position of the opposite one side of third radiation section 13, the third contact point is set up in the arbitrary position of the opposite one side of second radiation section 12 on the third radiation section 13, and the distance between third contact point and the second contact point is in the first predetermined range, thus has guaranteed the performance of the antenna element.

The specific size of the first preset range is not limited, and the antenna unit can be ensured to have good performance only by the distance between the second contact point and the third contact point.

In the following, referring to fig. 7a and 7b, a specific implementation manner of connecting the second feed F2 to the second radiation section 12 and the third radiation section 13 respectively is illustrated.

On the basis of the first ring branch 10 shown in fig. 6a, as shown in fig. 7a, the distance between the second radiation section 12 and the third radiation section 13 is the same and is a distance aa, and the distance aa is within a first preset range, so that the second feed F2 can be disposed at any position between the second radiation section 12 and the third radiation section 13. For convenience of illustration, in fig. 7a, the second feed F2 is illustrated as being disposed at a position corresponding to a solid line and a position corresponding to a dashed line, respectively.

On the basis that the first annular branch 10 shown in fig. 5b and the first feed source F1 has a first contact point with the first radiator, as shown in fig. 7b, the minimum distance between the second radiation section 12 and the third radiation section 13 is aa1, the maximum distance is aa2, and the first predetermined range is set to be less than or equal to the distance aa3, and the distance aa3 is less than the distance aa2 and greater than the distance aa 1. Therefore, the second feed F2 may be disposed at any position corresponding to the distance aa1 or more and the distance aa3 or less. For convenience of illustration, the second feed F2 is illustrated in fig. 7b as being disposed at a position corresponding to the distance aa1 and at a position corresponding to the distance aa 3.

In addition, a second matching component may be disposed between the second feed F2 and the second contact point, and/or between the second feed F2 and the third contact point, so as to adjust the frequency band of the antenna unit, so that the second feed F2 may obtain better directional diagram and cross polarization performance, thereby improving the performance of the antenna unit. The specific implementation form of the second matching component is not limited in the present application. For example, the second matching component may be a capacitor, an inductor, a capacitor and a switch, an inductor and a switch, or a capacitor, an inductor and a switch, etc. The capacitance value and the quantity of the capacitor, the inductance value and the quantity of the inductor, the type and the quantity of the switch or the connection relation of any two of the capacitor, the inductor and the switch are not limited by the application.

On the basis of the above embodiment, the antenna unit may further include: a first non-conductive support member 14, a first electrically conductive member 15, and a second electrically conductive member 16. The first conductive piece 15 and the second conductive piece 16 are suspended by the first nonconductive support piece 14, the first conductive piece 15 and the second conductive piece 16 are symmetrically arranged along the first direction X1, the length of the first conductive piece 15 is 1/2 wavelengths, the length of the second conductive piece 16 is 1/2 wavelengths, and the wavelengths are wavelengths corresponding to any frequency point in the working frequency band of the antenna unit.

In this application, the first conductive member 15 and the second conductive member 16 are made of conductive materials, and may be suspended by the first non-conductive supporting member 14 in a manner of a patch or etching, so that the bandwidth of the antenna unit may be widened by the first conductive member 15 and the second conductive member 16, thereby improving the performance of the antenna unit. Generally, the wider the widths of the first and second conductive members 15 and 16, the better the performance of the antenna unit.

Wherein the first conductive member 15 or the second conductive member 16 may include various shapes. Alternatively, the first conductive member 15 or the second conductive member 16 may be a regular block (patch) as shown in fig. 8a to 8c, an irregular block, a regular closed ring as shown in fig. 9a to 9c, or an irregular closed ring, and the present application does not limit the specific shape of the first conductive member 15 or the second conductive member 16, and only needs to satisfy that the first conductive member 15 and the second conductive member 16 are symmetrically arranged along the first direction X1.

In addition, the present application does not limit the width, number, and position of the first conductive member 15 and the second conductive member 16. Next, the positions of the first conductive member 15 and the second conductive member 16 will be exemplified on the basis of the antenna unit shown in fig. 7a, with reference to fig. 10a to 10 f. For convenience of illustration, in fig. 10a to 10c, the first conductive member 15 and the second conductive member 16 are illustrated as rectangular cross-sectional shapes, and in fig. 10d to 10f, the first conductive member 15 and the second conductive member 16 are illustrated as rectangular closed rings.

Alternatively, the first conductive member 15 and the second conductive member 16 may be disposed outside the first radiation section 11. For example, the first conductive member 15 and the second conductive member 16 may be disposed outside the first radiation section 11 in a vertical symmetry along a first direction X1, as shown in fig. 10a and 10b, where the first conductive member 15 and the second conductive member 16 are disposed in a direction perpendicular to the first direction X1 in fig. 10a, and the first conductive member 15 and the second conductive member 16 are disposed in a direction not perpendicular to the first direction X1 in fig. 10 b. For another example, the first conductive member 15 and the second conductive member 16 may also be disposed outside the first radiation section 11 in bilateral symmetry along the first direction X1, as shown in fig. 10 c.

Alternatively, the first conductive member 15 and the second conductive member 16 may be disposed inside the first radiation section 11. For example, the first conductive element 15 and the second conductive element 16 may be disposed inside the first radiation section 11 along the first direction X1 in an up-down symmetrical manner, as shown in fig. 10d and 10e, the placement direction of the first conductive element 15 and the second conductive element 16 in fig. 10d is perpendicular to the first direction X1, and the placement direction of the first conductive element 15 and the second conductive element 16 in fig. 10e is not perpendicular to the first direction X1. For another example, the first conductive member 15 and the second conductive member 16 may also be disposed inside the first radiation section 11 along the first direction X1 in a bilateral symmetry manner, as shown in fig. 10 f.

It should be noted that the positions of the first conductive member 15 and the second conductive member 16 are not limited to the above-mentioned implementation.

In addition, the first non-conductive supporting member 14 is made of a non-conductive material. The number, material, position and other parameters of the first non-conductive supporting member 14 are not limited in the present application. Alternatively, the first non-conductive support 14 may be a glass battery cover, a plastic battery cover, or an explosion-proof film, which is not limited in this application.

In a specific embodiment, the structure and performance of the antenna unit of the present application will be described in detail based on the antenna unit shown in fig. 5c with reference to fig. 11a to 11 d.

Fig. 11a shows an overall structural diagram of the electronic device. As shown in fig. 11a, the electronic device may include a printed circuit board, a middle frame, and an antenna unit as shown in fig. 5 c. As shown in fig. 11a and 5c, the second radiating section 12 may be connected to a ground region GG of the electronic device, which is connected to the ground of the printed circuit board through a pogo pin foot1 on the middle frame of the electronic device. The third radiating section 13 may be connected to a ground region GG of the electronic device, which is connected to the ground of the printed circuit board via a pogo pin foot2 on the middle frame of the electronic device.

The middle frame can be used as a structural support of the printed circuit board and can also be used for switching the elastic pins, so that the grounding area GG, the first grounding point and the second grounding point of the electronic device can be connected with the ground of the printed circuit board. This application does not all restrict to the quantity and the position of bullet foot on the center. For convenience of explanation, in fig. 11a, the electronic device is illustrated by taking a mobile phone as an example, and the middle frame, the elastic foot1 and the elastic foot2 are not illustrated.

Fig. 11b and 11c show schematic topologies of the antenna elements of fig. 11a and 5c, respectively. As shown in fig. 11b, the first feed F1 is connected to a first contact point along the first direction X1, the first contact point is a symmetric point of the first radiating segment 11 and is located on the first radiating segment 11, so that symmetric feeding of the antenna element is realized, so as to excite a signal of the C-mode port of the first loop branch 10. As shown in fig. 11c, a second feed F2 is connected to both the second radiating segment 12 and the third radiating segment 13, respectively, to implement anti-symmetric feeding of the antenna element, so as to excite the signal of the D-mode port of the first loop branch 10.

Fig. 11d shows a waveform diagram of the S parameters of the first feed F1 and the second feed F2 in fig. 11b and 11c in different operating frequency bands. In FIG. 11d, the abscissa is frequency in GHz and the ordinate is the input reflection coefficient S11, the reverse transmission coefficient S12/forward transmission coefficient S21 and the output reflection coefficient S22 in the S parameter in dB. As shown in FIG. 11d, curve 1 represents the input reflection coefficient S11 of the first feed F1, curve 2 represents the reverse transmission coefficient S12/forward transmission coefficient S21 of the first feed F1 and the second feed F2, and curve 3 represents the output reflection coefficient S22 of the second feed F2.

Fig. 11e shows waveform diagrams of the system efficiency and the radiation efficiency of the first feed F1 and the second feed F2 in fig. 11b and 11c, respectively. In fig. 11e, the abscissa is frequency in GHz and the ordinate is system efficiency in dB. As shown in fig. 11e, curve 1 represents the system efficiency of the first feed F1, curve 2 represents the radiation efficiency of the first feed F1, curve 3 represents the system efficiency of the second feed F2, and curve 4 represents the radiation efficiency of the second feed F2.

In the first embodiment, the antenna unit is based on the symmetrical layout of the same loop antenna (i.e., the first loop branch), the signal of the C-mode port and the signal of the D-mode port of the loop antenna are excited by the two feed sources respectively, so that the signal of the C-mode port is self-cancelled at the D-mode port, the signal of the D-mode port is self-cancelled at the C-mode port, thereby realizing signal isolation between the two ports, and also making the signal of the C-mode port and the signal of the D-mode port mutually complementary in different radiation directions, thereby realizing two antennas with high isolation and low ECC, and not only ensuring good antenna performance, so that the electronic device can fully utilize the antenna unit in a limited space to realize various scenes, but also can make the electronic device contain more antennas in the limited space, and improving the utilization rate of the antenna space.

Example two

Structurally, the same in the first and second embodiments is: the antenna units all comprise loop antennas and two feed sources, and the specific implementation modes of the loop antennas are the same. The difference between the first embodiment and the second embodiment is that: the antenna unit of the second embodiment is added with one branch compared with the antenna unit of the first embodiment.

In the connection mode, the first embodiment and the second embodiment are the same: one of the two feed sources is connected in the same way, and the feed sources are connected with the loop antenna. The difference between the first embodiment and the second embodiment is that: the other of the two feed sources is connected in different modes, in the first embodiment, the feed source is connected with the annular branch, and in the second embodiment, the feed source is connected with the newly added branch.

In a second embodiment, the antenna unit of the present application may include: a second ring branch 20, a feed branch 27, a third feed F3 and a fourth feed F4.

For a specific implementation manner of the second annular branch 20, reference may be made to the description of the first annular branch in the first embodiment, which is not described herein again.

In the present application, the second loop-shaped branch 20 may include a fourth radiating section 21, a fifth radiating section 22 and a sixth radiating section 23.

Wherein the fourth radiating section 21 is annular. For a specific shape of the fourth radiation section 21, reference may be made to the description of the shape of the first radiation section in the first embodiment, which is not described herein again. For example, the shape of the fourth radiation section 21 can be seen in the shape of the first radiation section shown in fig. 3 a-3 e.

Also, the fourth radiation section 21 is not closed and has two ends. One end of the fourth radiation section 21 is connected to the fifth radiation section 22, and the other end of the fourth radiation section 21 is connected to the sixth radiation section 23. The fifth radiation section 22 and the sixth radiation section 23 are symmetrically arranged along the second direction X2, and an opening is formed between the fifth radiation section 22 and the sixth radiation section 23.

The shape, width or length of the fourth radiation section 21 and the fifth radiation section 22 are not limited in this application. And the size of the opening between the fourth radiation section 21 and the fifth radiation section 22 is not limited. In addition, the relative position relationship between the fourth radiation section 21 and the third radiation section 22 and the relative position relationship between the fifth radiation section and the third radiation section are not limited in the present application.

The specific implementation of the fifth radiation segment 22 can refer to the description of the second radiation segment in the first embodiment, and the specific implementation of the sixth radiation segment 23 can refer to the description of the third radiation segment in the first embodiment, which is not described herein again. For example, the fifth radiation segment 22 and the sixth radiation segment 23 can be arranged as described in the first embodiment with reference to the second radiation segment and the third radiation segment shown in fig. 4a to 4 f.

Also, the fifth radiation segment 22 and the sixth radiation segment 23 are both grounded. The grounding manners of the fifth radiation section 22 and the sixth radiation section 23 can refer to the descriptions of the grounding manners of the second radiation section and the third radiation section in the first embodiment, and are not described herein again. For example, the grounding manners of the fifth radiation segment 22 and the sixth radiation segment 23 can be referred to the description of the grounding manners of the second radiation segment and the third radiation segment shown in fig. 5a to 5c in the first embodiment.

Optionally, the fifth radiating section 22 is connected to M third grounding points of the electronic device, and the sixth radiating section 23 is connected to M fourth grounding points of the electronic device, where M is a positive integer. The specific size of M is not limited in the present application. Where the third grounding point may refer to the description of the first grounding point as shown in fig. 5a and 5b in the first embodiment and the fourth grounding point may refer to the description of the second grounding point as shown in fig. 5a and 5b in the first embodiment.

When the antenna unit of the present application is manufactured by a process using a support, the fifth radiating section 22 and the sixth radiating section 23 are disposed on the support, and the third grounding point and the fourth grounding point may be disposed in various ways. In the following, two possible implementations are exemplified.

In a possible implementation, the third ground point and the fourth ground point may be provided on a printed circuit board. The third grounding point and the fourth grounding point can be the ground of the printed circuit board and do not need to be arranged separately. The third grounding point and the fourth grounding point can also be independently arranged and are connected with the ground of the printed circuit board through the wiring on the printed circuit board. Thus, the fifth radiation section 22 and the sixth radiation section 23 are respectively switched to the third grounding point and the fourth grounding point of the pcb through different traces on the bracket, and the different traces on the bracket are generally symmetrically arranged along the second direction X2. By doing so, the elastic foot is saved, and the scheme is simple and easy to implement.

In another possible implementation, the third and fourth grounding points may be arranged on the support such that the fifth radiating section 22 is connected to the third grounding point and the sixth radiating section 23 is connected to the fourth grounding point. And the third grounding point and the fourth grounding point need to be respectively connected with the ground of the printed circuit board through elastic pins on the bracket, and wiring does not need to be arranged on the bracket.

Alternatively, the fifth radiation segment 22 and the sixth radiation segment 23 may be connected to both ground areas of the electronic device, and the ground areas are symmetrically arranged along the second direction X2. The above implementation may refer to the description of the embodiment shown in fig. 5c in the first embodiment.

The second direction X2 refers to a direction in which the symmetry axis of the second annular branch 20 is located, and may point in any direction along with the placement direction of the second annular branch 20. It should be noted that the second annular branch 20 may be structurally configured to be completely symmetrical, that is, the second direction is a direction in which a symmetry axis of the second annular branch 20 is located, and may also be structurally configured to be asymmetric within an error range, where the asymmetry is to eliminate electrical asymmetry introduced by other components except the second annular branch 20, that is, the second direction is a direction in which the symmetry axis of the second annular branch 20 is located after being corrected. For details of the second direction X2, reference may be made to the description of the first direction X1 in the first embodiment, which is not described herein again. For convenience of explanation, the second direction X2 in the present application is illustrated by taking the positive direction of the X axis as an example.

In this application, the feeding branches 27 are symmetrically disposed along the second direction X2, and the area of the feeding branch 27 facing the fifth radiation segment 22 is equal to the area of the feeding branch 27 facing the sixth radiation segment 23, so as to ensure that the feeding branch 27 has symmetry.

The present application does not limit the manufacturing process of the feeding branch 27. For example, the feeding branch 27 may be made of a flexible printed circuit board (FPC), a laser, or a spraying process. In addition, the shape, width or length of the feeding branch 27 and other parameters and positions are not limited in this application.

Next, the arrangement of the feeding branch 27 will be described by way of example with reference to fig. 12a to 12f, fig. 13a to 13f, and fig. 14a to 14 f. For convenience of illustration, in fig. 12a to 12f, fig. 13a to 13f and fig. 14a to 14f, the fourth radiation section 21 is illustrated by taking a square as an example.

Optionally, the feeding branch 27 may be disposed inside the fourth radiation section 21 along the second direction X2, so as to make full use of an internal space of the fourth radiation section 21, and implement the arrangement of the feeding branch 27, the fifth radiation section 22, and the sixth radiation section 23, thereby facilitating the layout of the antenna unit in a smaller space and improving the space utilization of the antenna unit.

The feed stub 27 in the manner described above is illustrated by way of example in fig. 12 a-12 f.

As shown in fig. 12a, the feeding branch 27 is long and located between the fifth radiation segment 22 and the sixth radiation segment 23 and inside the fourth radiation segment 21 (indicated by a solid line in fig. 12 a), or the feeding branch 27 is long and located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the inside of the fourth radiation segment 21 (indicated by a broken line in fig. 12 a). And the arrangement of the fifth radiation segment 22 in fig. 12a can be referred to the second radiation segment shown in fig. 4a in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 12a can be referred to the third radiation segment shown in fig. 4a in the first embodiment.

As shown in fig. 12b, the feeding branch 27 is long and located between the fifth radiation segment 22 and the sixth radiation segment 23 and inside the fourth radiation segment 21 (indicated by a solid line in fig. 12 b), or the feeding branch 27 is long and located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the inside of the fourth radiation segment 21 (indicated by a broken line in fig. 12 b). And the arrangement of the fifth radiation segment 22 in fig. 12b can be referred to the second radiation segment shown in fig. 4b in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 12b can be referred to the third radiation segment shown in fig. 4b in the first embodiment.

As shown in fig. 12c, the feeding branch 27 is long and located between the fifth radiation segment 22 and the sixth radiation segment 23 and inside the fourth radiation segment 21 (indicated by a solid line in fig. 12 c), or the feeding branch 27 is long and located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the inside of the fourth radiation segment 21 (indicated by a broken line in fig. 12 c). And the arrangement of the fifth radiation segment 22 in fig. 12c can be referred to the second radiation segment shown in fig. 4c in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 12c can be referred to the third radiation segment shown in fig. 4c in the first embodiment.

As shown in fig. 12d, the feeding branch 27 is in an elongated shape and is located at one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the inside of the fourth radiation segment 21. And the arrangement of the fifth radiation segment 22 in fig. 12d can be referred to the second radiation segment shown in fig. 4d in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 12d can be referred to the third radiation segment shown in fig. 4d in the first embodiment.

As shown in fig. 12e, the feeding branch 27 is long and located between the fifth radiation segment 22 and the sixth radiation segment 23 and inside the fourth radiation segment 21 (indicated by a solid line in fig. 12 e), or the feeding branch 27 is long and located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the inside of the fourth radiation segment 21 (indicated by a broken line in fig. 12 e). And the arrangement of the fifth radiation segment 22 in fig. 12e can be referred to the second radiation segment shown in fig. 4e in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 12e can be referred to the third radiation segment shown in fig. 4e in the first embodiment.

As shown in fig. 12f, the feeding branch 27 is in an elongated shape and is located between the fifth radiation segment 22 and the sixth radiation segment 23 and inside the fourth radiation segment 21. And the arrangement of the fifth radiation section 22 in fig. 12f can be referred to the second radiation section shown in fig. 4f in the first embodiment, and the arrangement of the sixth radiation section 23 in fig. 12f can be referred to the third radiation section shown in fig. 4f in the first embodiment.

Alternatively, the feed branch 27 may be arranged outside the fourth radiation section 21 in the second direction X2, providing a possibility for implementing an antenna element such that the antenna element is able to meet the space requirements of the actual situation.

The above described feed stub 27 is illustrated by way of example in fig. 13 a-13 f.

As shown in fig. 13a, the feeding branch 27 is in an elongated shape and is located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the outside of the fourth radiation segment 21. And the arrangement of the fifth radiation segment 22 in fig. 13a can be referred to the second radiation segment shown in fig. 4a in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 13a can be referred to the third radiation segment shown in fig. 4a in the first embodiment.

As shown in fig. 13b, the feeding branch 27 is in an elongated shape and is located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the outside of the fourth radiation segment 21. And the arrangement of the fifth radiation segment 22 in fig. 13b can be referred to the second radiation segment shown in fig. 4b in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 13b can be referred to the third radiation segment shown in fig. 4b in the first embodiment.

As shown in fig. 13c, the feeding branch 27 is in an elongated shape and is located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the outside of the fourth radiation segment 21. And the arrangement of the fifth radiation segment 22 in fig. 13c can be referred to the second radiation segment shown in fig. 4c in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 13c can be referred to the third radiation segment shown in fig. 4c in the first embodiment.

As shown in fig. 13d, the feeding branch 27 is in an elongated shape and is located between the fifth radiation segment 22 and the sixth radiation segment 23 and outside the fourth radiation segment 21 (indicated by a solid line in fig. 13 d), or the feeding branch 27 is in an elongated shape and is located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the outside of the fourth radiation segment 21 (indicated by a broken line in fig. 13 d). And the arrangement of the fifth radiation section 22 in fig. 13d can be referred to the second radiation section shown in fig. 4d in the first embodiment, and the arrangement of the sixth radiation section 23 in fig. 13d can be referred to the third radiation section shown in fig. 4d in the first embodiment.

As shown in fig. 13e, the feeding branch 27 is long and located between the fifth radiation segment 22 and the sixth radiation segment 23 and outside the fourth radiation segment 21 (indicated by a solid line in fig. 13 e), or the feeding branch 27 is long and located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 near the outside of the fourth radiation segment 21 (indicated by a broken line in fig. 13 e). And the arrangement of the fifth radiation segment 22 in fig. 13e can be referred to the second radiation segment shown in fig. 4e in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 13e can be referred to the third radiation segment shown in fig. 4e in the first embodiment.

As shown in fig. 13f, the feeding branch 27 is in an elongated shape and is located on one side of the fifth radiation segment 22 and the sixth radiation segment 23 close to the outside of the fourth radiation segment 21. And the arrangement of the fifth radiation section 22 in fig. 13f can be referred to the second radiation section shown in fig. 4f in the first embodiment, and the arrangement of the sixth radiation section 23 in fig. 13f can be referred to the third radiation section shown in fig. 4f in the first embodiment.

Alternatively, the feeding branch 27 may be arranged to extend from the inside of the fourth radiation section 21 to the outside of the fourth radiation section 21 in the second direction X2, providing another possibility for implementing the antenna element so that the antenna element can meet the space requirement of the actual situation.

The above described feed stub 27 is illustrated by way of example in fig. 14 a-14 f.

As shown in fig. 14a, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation segment 22 in fig. 14a can be referred to the second radiation segment shown in fig. 4a in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 14a can be referred to the third radiation segment shown in fig. 4a in the first embodiment.

As shown in fig. 14b, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation segment 22 in fig. 14b can be referred to the second radiation segment shown in fig. 4b in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 14b can be referred to the third radiation segment shown in fig. 4b in the first embodiment.

As shown in fig. 14c, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation segment 22 in fig. 14c can be referred to the second radiation segment shown in fig. 4c in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 14c can be referred to the third radiation segment shown in fig. 4c in the first embodiment.

As shown in fig. 14d, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation segment 22 in fig. 14d can be referred to the second radiation segment shown in fig. 4d in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 14d can be referred to the third radiation segment shown in fig. 4d in the first embodiment.

As shown in fig. 14e, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation segment 22 in fig. 14e can be referred to the second radiation segment shown in fig. 4e in the first embodiment, and the arrangement of the sixth radiation segment 23 in fig. 14e can be referred to the third radiation segment shown in fig. 4e in the first embodiment.

As shown in fig. 14f, the feeding branch 27 is elongated and located between the fifth radiation segment 22 and the sixth radiation segment 23, and the feeding branch 27 extends from the inside of the fourth radiation segment 21 to the outside of the fourth radiation segment 21 along the second direction X2. And the arrangement of the fifth radiation section 22 in fig. 14f can be referred to the second radiation section shown in fig. 4f in the first embodiment, and the arrangement of the sixth radiation section 23 in fig. 14f can be referred to the third radiation section shown in fig. 4f in the first embodiment.

In summary, the area of the feeding branch 27 facing the fifth radiation segment 22 along the second direction X2 is equal to the area of the feeding branch 27 facing the sixth radiation segment 23 along the second direction X2, or the area of the feeding branch 27 facing the fifth radiation segment 22 along the direction perpendicular to the second direction X2 is equal to the area of the feeding branch 27 facing the sixth radiation segment 23 along the direction perpendicular to the second direction X2, so as to ensure that the feeding branch 27 has symmetry.

In this application, the third feed F3 is symmetrically connected to the feeding branch 27 along the second direction X2, which is different from the first embodiment in that the first feed is symmetrically connected to the first radiation segment along the first direction X1, and in this application, one or more fourth contact points are provided between the third feed F3 and the feeding branch 27. Wherein the fourth contact point is a symmetrical point of the feeding branch 27 along the second direction X2. The number and the position of the fourth contact points are not limited, and the fourth contact points are only required to be symmetrical along the second direction X2.

Taking the number of the fourth contact points as an example, with reference to fig. 15a and 15b, the third feed F3 is illustrated as being symmetrically connected to the feed branch 27 along the second direction X2.

On the basis of the second loop-shaped branch 20 shown in fig. 12b, as shown in fig. 15a, a third feed F3 is fed in the second direction X2 from a fourth contact point located on the side of the feed branch 27 inside the fourth radiating section 21. And the fifth radiating section 22 is connected to a third ground point and the sixth radiating section 23 is connected to a fourth ground point. In fig. 15a, the third and fourth grounding points are illustrated with a grounding symbol as an example.

On the basis of the second loop-shaped branch 20 shown in fig. 12c, as shown in fig. 15b, a third feed F3 is fed in the second direction X2 from a fourth contact point located on the side of the feed branch 27 inside the fourth radiating section 21. And the fifth radiating section 22 is connected to two third grounding points and the sixth radiating section 23 is connected to two fourth grounding points. In fig. 15b, the third and fourth grounding points are illustrated with a grounding symbol as an example.

In addition, a third matching component may be disposed between the third feed F3 and the fourth contact point, so as to adjust the frequency band of the antenna unit, so that the third feed F3 may obtain better pattern and cross polarization performance, thereby improving the performance of the antenna unit. The specific implementation form of the third matching component is not limited in the present application. For example, the third matching component may be a capacitor, an inductor, a capacitor and a switch, an inductor and a switch, or a capacitor, an inductor and a switch, etc. The capacitance value and the quantity of the capacitor, the inductance value and the quantity of the inductor, the type and the quantity of the switch or the connection relation of any two of the capacitor, the inductor and the switch are not limited by the application.

In the present application, the fourth feed F4 is connected to both the fifth radiation segment 22 and the sixth radiation segment 23, respectively, in the same manner as the first embodiment in which the second feed is connected to both the second radiation segment and the third radiation segment, respectively, and the contact point of the fourth feed F4 and the fifth radiation segment 22 is referred to as a fifth contact point, the contact point of the fourth feed F4 and the sixth radiation segment 23 is referred to as a sixth contact point, and the fifth contact point and the sixth contact point are symmetrical along the second direction X2.

And, the fifth contact point is disposed at any one position of a face of the fifth radiation section 22 opposite to the sixth radiation section 23, the sixth contact point is disposed at any one position of a face of the sixth radiation section 23 opposite to the fifth radiation section 22, and a distance between the fifth contact point and the sixth contact point is within a second preset range, thereby ensuring performance of the antenna unit.

The specific size of the second preset range is not limited, and the antenna unit can be ensured to have good performance only by the distance between the fifth contact point and the sixth contact point.

Next, with reference to fig. 16a and 16b, a specific implementation manner of connecting the fourth feed F4 to the fifth radiation segment 22 and the sixth radiation segment 23 respectively is illustrated.

On the basis of the second annular branch 20 shown in fig. 15a, as shown in fig. 16a, the distance between the fifth radiation segment 22 and the sixth radiation segment 23 is the same and is a distance aa, and the distance aa is within a second preset range, so that the fourth feed F4 can be disposed at any position between the fifth radiation segment 22 and the sixth radiation segment 23. For convenience of illustration, in fig. 16a, the fourth feed F4 is illustrated as being disposed at a position corresponding to a solid line and a position corresponding to a broken line, respectively.

On the basis of the second annular branch 20 shown in fig. 15b, as shown in fig. 16b, the minimum distance between the fifth radiation segment 22 and the sixth radiation segment 23 is a distance aa1, the maximum distance is a distance aa2, and the second predetermined range is set to be equal to or less than the distance aa3, and the distance aa3 is smaller than the distance aa2 and larger than the distance aa 1. Therefore, the fourth feed F4 may be disposed at any position corresponding to the distance aa1 or more and the distance aa3 or less. For convenience of illustration, the fourth feed F4 in fig. 16b is illustrated as being disposed at a position corresponding to the distance aa1 and at a position corresponding to the distance aa 3.

In addition, a fourth matching component may be disposed between the fourth feed F4 and the fifth contact point, and/or between the fourth feed F4 and the sixth contact point, so as to adjust the frequency band of the antenna unit, so that the fourth feed F4 may obtain better directional diagram and cross polarization performance, thereby improving the performance of the antenna unit. The specific implementation form of the fourth matching component is not limited in the present application. For example, the fourth matching component may be a capacitor, an inductor, a capacitor and a switch, an inductor and a switch, or a capacitor, an inductor and a switch, etc. The capacitance value and the quantity of the capacitor, the inductance value and the quantity of the inductor, the type and the quantity of the switch or the connection relation of any two of the capacitor, the inductor and the switch are not limited by the application.

On the basis of the above embodiment, the antenna unit may further include: a second electrically non-conductive support member 24, a third electrically conductive member 25 and a fourth electrically conductive member 26. The third conductive member 25 and the fourth conductive member 26 are suspended by the second nonconductive support member 24, the third conductive member 25 and the fourth conductive member 26 are symmetrically arranged along the second direction X2, the length of the third conductive member 25 is 1/2 wavelengths, the length of the fourth conductive member 26 is 1/2 wavelengths, and the wavelengths are wavelengths corresponding to any frequency point in the working frequency band of the antenna unit.

In this application, the third conductive member 25 and the fourth conductive member 26 are made of conductive materials, and may be suspended by the second non-conductive supporting member 24 in a manner of a patch or etching, so that the bandwidth of the antenna unit may be widened by the conductive third conductive member 25 and the conductive fourth conductive member 26, and the performance of the antenna unit may be improved. Generally, the wider the widths of the third conductive member 25 and the fourth conductive member 26, the better the performance of the antenna unit.

Wherein the third conductive member 25 or the fourth conductive member 26 may include various shapes. The shape of the third conductive component 25 or the fourth conductive component 26 can refer to the description of the shape of the first conductive component or the second conductive component in the first embodiment, and is not described herein again. For example, the shape of the third conductive member 25 or the fourth conductive member 26 may be a block (patch) as shown in fig. 8a to 8c or a closed loop as shown in fig. 9a to 9c in the first embodiment. The specific shape of the third conductive member 25 or the fourth conductive member 26 is not limited, and the third conductive member 25 and the fourth conductive member 26 are only required to be symmetrically arranged along the second direction X2.

In addition, the present application does not limit the width, number, and position of the third conductive member 25 and the fourth conductive member 26. Next, on the basis of the antenna unit shown in fig. 16a, the positions of the third conductive member 25 and the fourth conductive member 26 will be exemplified with reference to fig. 17a to 17 f. For convenience of illustration, fig. 17a to 17c illustrate the third conductive member 25 and the fourth conductive member 26 as rectangular cross-sectional shapes, and fig. 17d to 17f illustrate the third conductive member 25 and the fourth conductive member 26 as rectangular closed rings.

Alternatively, the third conductive element 25 and the fourth conductive element 26 may be disposed outside the fourth radiation section 21. For example, the third conductive element 25 and the fourth conductive element 26 may be disposed outside the fourth radiation section 21 in the second direction X2 up and down symmetrically, as shown in fig. 17a and 17b, the placement direction of the third conductive element 25 and the fourth conductive element 26 in fig. 17a is perpendicular to the second direction X2, and the placement direction of the first conductive element and the second conductive element in fig. 17b is not perpendicular to the second direction X2. For another example, the third conductive member 25 and the fourth conductive member 26 may also be disposed outside the fourth radiation section 21 along the second direction X2 in a left-right symmetry manner, as shown in fig. 17 c.

Alternatively, the third conductive element 25 and the fourth conductive element 26 may be disposed inside the fourth radiation section 21. For example, the third conductive element 25 and the fourth conductive element 26 may be disposed inside the fourth radiation section 21 along the second direction X2 in an up-down symmetrical manner, as shown in fig. 17d and 17e, the placement direction of the third conductive element 25 and the fourth conductive element 26 in fig. 17d is perpendicular to the second direction X2, and the placement direction of the third conductive element 25 and the fourth conductive element 26 in fig. 17e is not perpendicular to the second direction X2. For another example, the third conductive member 25 and the fourth conductive member 26 may also be disposed inside the fourth radiation section 21 along the second direction X2 in a left-right symmetry manner, as shown in fig. 17 f.

It should be noted that the positions of the third conductive member 25 and the fourth conductive member 26 are not limited to the above-mentioned implementation.

In addition, the second non-conductive supporting member 24 is made of a non-conductive material. The number, material, position and other parameters of the second non-conductive supporting element 24 are not limited in the present application. Alternatively, the second non-conductive support 24 may be a glass battery cover, a plastic battery cover, or an explosion-proof film, which is not limited in this application.

In a specific embodiment, the structure, performance and current distribution of the antenna unit of the present application are described in detail based on the antenna unit shown in fig. 16a in conjunction with fig. 18 a-18 i.

Fig. 18a shows a schematic topology of the antenna element shown in fig. 16 a. As shown in fig. 18a, the antenna unit may include: a second loop Antenna (ABGHIJKLCD), a feed stub 27(EF), a third feed F3 and a fourth feed F4, the third feed F3 is coupled and fed through a fourth contact point E, and the fourth feed F4 is fed through two points, namely a fifth contact point B and a sixth contact point C. The point a and the point D are ground points, while being used for the ground of the microstrip line of the fourth feed F4. The third matching component of the third feed F3 is a 0.6pF capacitor connected in series, and the fourth matching component of the fourth feed F4 is a 1.5nH inductor connected in series. The third feed F3 excites the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD), and the Specific Absorption Rate (SAR) value is not higher than 0.75. The fourth feed F4 excites the signal at the D-mode port of the second loop Antenna (ABGHIJKLCD) with SAR values up to 4.23 and the second resonant SAR is lower at 1.2.

To sum up, the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 1, and the signal of the D-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 2, so that the antenna unit can form two antennas.

Where table 1 shows SAR simulation values for antenna 1, where the back attitude (backslide) specifies an attitude where the SAR probe is located on the back of the electronic device and 5mm away from the antenna. Table 2 shows the SAR simulation values of the antenna 2. And different frequencies, the ECC of antenna 1 and antenna 2 are different, see table 3 specifically. And the isolation between the antenna 1 and the antenna 2 is more than 19.5dB, and the ECC is less than 0.007. And the third feed F3 can cover the N77+ N79 frequency band with-3 dB in-band efficiency. The fourth feed F4 may cover the N77 band with an in-band efficiency of-5 dB.

Table 1 SAR simulation values for antenna 1

Table 2 SAR simulation values for antenna 2

TABLE 3 ECC for antenna 1 and antenna 2

Frequency of	3.3	3.6	4.2
				ECC	0.002	0.0001	0.007

Fig. 18b shows a waveform diagram of the S parameters of the third feed F3 and the fourth feed F4 in fig. 18a on different working frequency bands. In FIG. 18b, the abscissa is frequency in GHz and the ordinate is the input reflection coefficient S11, the reverse transmission coefficient S12/forward transmission coefficient S21 and the output reflection coefficient S22 in the S parameter in dB. As shown in fig. 18b, curve 1 represents the input reflection coefficient S11 of the third feed F3, the resonance point (corresponding to the signal of the D-mode port of the first feed) in curve 1, curve 2 represents the reverse transmission coefficient S12/forward transmission coefficient S21 of the third feed F3 and the fourth feed F4, and curve 3 represents the output reflection coefficient S22 of the fourth feed F4.

FIG. 18c shows a waveform schematic diagram of the system efficiency and the radiation efficiency of the third feed F3 and the fourth feed F4, respectively, in FIG. 18 a. In fig. 18c, the abscissa is frequency in GHz and the ordinate is system efficiency in dB. As shown in fig. 18c, curve 1 represents the system efficiency of the third feed F3, curve 2 represents the radiation efficiency of the third feed F3, curve 3 represents the system efficiency of the fourth feed F4, and curve 4 represents the radiation efficiency of the fourth feed F4.

Next, based on the above description, the circuit direction distribution of the antenna unit is exemplified with reference to fig. 18d to 18 i.

Fig. 18d shows the current distribution of the antenna element in the case where the third feed F3 excites the half-multiplied mode of the 1.4GHz second loop stub 20. Fig. 18e shows the current distribution of the antenna element in the case where the third feed F3 excites the three-half frequency multiplication mode of the 3GHz second loop segment 20. Fig. 18F shows the current distribution pattern of the antenna element in case the third feed F3 excites the three-half frequency doubled mode of the 3.6GHz second loop branch 20. Fig. 18g shows the current profile of the antenna element in the case where the third feed F3 excites the three-half times multiplication mode of the 4GHz second loop branch 20 and the quarter times multiplication mode of the feed branch 27 EF.

Fig. 18h shows the current distribution of the antenna element in the case where the fourth feed F4 excites a frequency doubled mode of the 3.2GHz second loop stub 20. Fig. 18i shows the current profile of the antenna unit in case the fourth feed F4 excites the double frequency mode functioning as the second loop stub 20 at 4.2GHz (and the fourth matching component is series connected to a 1.5nH inductance, where the radiating sections AB and CD function as parallel inductances).

In another specific embodiment, the structure, performance and current distribution of the antenna unit of the present application are described in detail based on the antenna unit shown in fig. 16a in conjunction with fig. 19a to 19 j. Different from the previous embodiment, the third matching component accessed by the third feed F3 is different from the fourth matching component accessed by the fourth feed F4.

Fig. 19a shows a schematic topology of the antenna element shown in fig. 16 a. As shown in fig. 19a, the antenna unit includes: a second loop Antenna (ABGHIJKLCD), a feed stub 27(EF), a third feed F3 and a fourth feed F4, the third feed F3 is coupled and fed through a fourth contact point E, and the fourth feed F4 is fed through two points, namely a fifth contact point B and a sixth contact point C. The point a and the point D are ground points, while being used for the ground of the microstrip line of the fourth feed F4. The third matching component of the third feed F3 is a series-connected 1pF capacitor, and the fourth matching component of the fourth feed F4 is a series-connected 0.3pF capacitor and 4nH inductor. Excited by the third feed F3 is the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD). The fourth feed F4 excites the signal of the D-mode port of the second loop antenna ABGHIJKLCD. The third feed source F3 can cover WIFI2.4G + N77+ N79+ WIFI5G frequency bands, WIFI2.4G in-band efficiency is-3.2 dB, N77 in-band efficiency is-5.7 dB, N79 in-band efficiency is-4.2 dB, and WIFI5G in-band efficiency is-3.4 dB. The fourth feed F4 can cover WIFI2.4G + WIFI5G frequency bands, WIFI2.4G in-band efficiency is-3.2 dB, and WIFI5G in-band efficiency is-3.7 dB. The directivity of the two antennas is maximum 3.7dBi at WIFI2.4GHz.

To sum up, the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 1, and the signal of the D-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 2, so that the antenna unit can form two antennas. Where table 4 shows SAR simulation values for antenna 1 and table 5 shows SAR simulation values for antenna 2. And different frequencies, the ECC of antenna 1 and antenna 2 are different, see table 6. And the isolation between the antenna 1 and the antenna 2 is greater than 12.1dB, and the ECC is less than 0.04. The SAR value of the signal of the C-mode port of Wifi2.4G is 0.6, the SAR value of the signal of the D-mode port is 2.86, the SAR value of the signal of the C-mode port of WIFI5G is 1.7, and the SAR value of the signal of the D-mode port is 0.5. The SAR value of the signal at the C-mode port of N77N79 is 0.7.

Table 4 SAR simulation values for antenna 1

TABLE 5 SAR simulation values for antenna 2

TABLE 6 ECC for antenna 1 and antenna 2

Frequency of	2.4	3.6	4.7	5.5
					ECC	0.0007	0.004	0.04	0.007

Fig. 19b shows a waveform diagram of the S parameters of the third feed F3 and the fourth feed F4 in fig. 19a on different operating frequency bands. In fig. 19b, the abscissa is frequency in GHz and the ordinate is the input reflection coefficient S11, the reverse transmission coefficient S12/forward transmission coefficient S21 and the output reflection coefficient S22 in dB among the S parameters. As shown in FIG. 19b, curve 1 represents the input reflection coefficient S11 of the third feed F3, curve 2 represents the reverse transmission coefficient S12/forward transmission coefficient S21 of the third feed F3 and the fourth feed F4, and curve 3 represents the output reflection coefficient S22 of the fourth feed F4.

Fig. 19c shows a waveform diagram of the system efficiency and the radiation efficiency of the third feed F3 and the fourth feed F4 in fig. 19a, respectively. In fig. 19c, the abscissa is frequency in GHz and the ordinate is system efficiency in dB. As shown in fig. 19c, curve 1 represents the system efficiency of the third feed F3, curve 2 represents the radiation efficiency of the third feed F3, curve 3 represents the system efficiency of the fourth feed F4, and curve 4 represents the radiation efficiency of the fourth feed F4.

Next, based on the above description, the circuit direction distribution of the antenna elements is exemplified with reference to fig. 19d to 19 j.

Fig. 19d shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the three-half frequency multiplication mode of the 2.4GHz second loop segment 20. Fig. 19e shows the current distribution of the antenna element in case the third feed F3 excites the three-half frequency multiplication mode acting as the second loop branch 20 of 3.6GHz, wherein the radiating sections AB and CD act as parallel inductances. Fig. 19F shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the fifth half-multiplier mode of the 4.7GHz second loop stub 20. Fig. 19g shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the three-half frequency multiplication mode of the 5.8GHz second loop segment 20.

Fig. 19h shows the current distribution of the antenna element in case the fourth feed F4 excites a double frequency mode of the 2.4GHz second loop stub 20. Fig. 19i shows the current distribution of the antenna element in case the fourth feed F4 excites the double frequency mode of the 4GHz second loop stub 20. Fig. 19j shows the current distribution of the antenna element in the case where the fourth feed F4 excites the frequency-tripled mode of the 5.6GHz second loop stub 20.

In another specific embodiment, the structure, performance and current distribution of the antenna unit of the present application are described in detail based on the antenna unit shown in fig. 17a in conjunction with fig. 20a to 20 i. In which a second non-conductive support 24, a third conductor 25MN and a fourth conductor 26OP are added, unlike the first embodiment.

Fig. 20a shows a schematic topology of the antenna element shown in fig. 17 a. As shown in fig. 20a, the antenna unit includes: a second loop Antenna (ABGHIJKLCD), a feed stub 27(EF), a third feed F3, a fourth feed F4, a second non-conductive support 24 (not shown in fig. 20 a), a third conductive member 25MN, and a fourth conductive member 26 OP. The third feed F3 is fed in through the fourth contact point E, and the fourth feed F4 is fed in through the fifth contact point B and the sixth contact point C. The point a and the point D are ground points, while being used for the ground of the microstrip line of the fourth feed F4. The third conductor 25(MN) and the fourth conductor 26(OP) are used to broaden the bandwidth of the antenna element. The third matching component of the third feed F3 is a 0.6pF capacitor connected in series, and the fourth matching component of the fourth feed F4 is a 1.5nH inductor connected in series. Excited by the third feed F3 is the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD). The fourth feed F4 excites the signal of the D-mode port of the second loop Antenna (ABGHIJKLCD).

To sum up, the signal of the C-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 1, and the signal of the D-mode port of the second loop Antenna (ABGHIJKLCD) causes the antenna unit to form the antenna 2, so that the antenna unit can form two antennas. Where table 7 shows SAR simulation values for antenna 1, third conductor 25(MN), and fourth conductor 26(OP), and table 8 shows SAR simulation values for antenna 2, third conductor 25MN, and fourth conductor 26 OP. And different frequencies, the ECC of antenna 1 and antenna 2 are different, see table 9. And the isolation between the antenna 1 and the antenna 2 is more than 12dB, and the ECC is less than 0.09. Both the third feed F3 and the fourth feed F4 may cover the N77+ N79 frequency band by means of the third conductor 25(MN) and the fourth conductor 26 (OP). The third feed F3 is at-3 dB in-band efficiency and the fourth feed F4 is at-4 dB in-band efficiency. And the SAR value of the antenna 2 is at most 1.89 and that of the antenna 1 is at most 1.18, through the third conductor 25MN and the fourth conductor 26 OP.

TABLE 7 SAR simulation values for antenna 1, third conductor 25(MN) and fourth conductor 26(OP)

TABLE 8 SAR simulation values for antenna 2, third conductor 25(MN), and fourth conductor 26(OP)

TABLE 9 ECC for antenna 1 and antenna 2

Frequency of	3.3	3.6	4.2	5
					ECC	0.005	0.004	0.01	0.09

Fig. 20b shows a waveform diagram of the S parameters of the third feed F3 and the fourth feed F4 in fig. 20a in different operating frequency bands. In fig. 20b, the abscissa is frequency in GHz and the ordinate is the input reflection coefficient S11, the reverse transmission coefficient S12/forward transmission coefficient S21 and the output reflection coefficient S22 in dB among the S parameters. As shown in FIG. 20b, curve 1 represents the input reflection coefficient S11 of the third feed F3, curve 2 represents the reverse transmission coefficient S12/forward transmission coefficient S21 of the third feed F3 and the fourth feed F4, and curve 3 represents the output reflection coefficient S22 of the fourth feed F4.

Fig. 20c shows a waveform diagram of the system efficiency and the radiation efficiency of the third feed F3 and the fourth feed F4 in fig. 20a, respectively. In fig. 20c, the abscissa is frequency in GHz and the ordinate is system efficiency in dB. As shown in fig. 20c, curve 1 represents the system efficiency of the third feed F3, curve 2 represents the radiation efficiency of the third feed F3, curve 3 represents the system efficiency of the fourth feed F4, and curve 4 represents the radiation efficiency of the fourth feed F4.

Next, based on the above description, the circuit direction distribution of the antenna unit is exemplified with reference to fig. 20d to 20 i.

Fig. 20d shows the current distribution of the antenna element in the case where the third feed F3 excites the three-half frequency multiplication mode of the 3GHz second loop segment 20. Fig. 20e shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the three-half frequency multiplication mode of the 3.7GHz second loop segment 20. Fig. 20F shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the fifth half-multiplier mode of the 4.5GHz second loop stub 20. Fig. 20g shows the current distribution pattern of the antenna element in the case where the third feed F3 excites the three-half frequency doubled mode of the 2.9GHz second loop segment 20.

Fig. 20h shows the current distribution of the antenna element in case the fourth feed F4 excites a double frequency mode of the 4GHz second loop stub 20. Fig. 20i shows the current distribution of the antenna element in case the fourth feed F4 excites the doubled frequency mode of the 2.5GHz second loop stub 20.

In another specific embodiment, the structure, performance and current distribution of the antenna unit of the present application are described in detail based on the antenna unit shown in fig. 16b in conjunction with fig. 21 a-21 c. Different from the first embodiment, the specific implementation form of the antenna unit is different.

Fig. 21a shows a schematic topology of the antenna element shown in fig. 16 b. As shown in fig. 21a, the antenna unit includes: a second loop antenna (ABGHIJKLCD + MNO + PQR), a feed stub 27(EF), a third feed F3 and a fourth feed F4. The third feed F3 is fed in through the fourth contact point E, and the fourth feed F4 is fed in through the fifth contact point O and the sixth contact point P. Point M, point N, point Q, and point R are ground points. The third matching component of the third feed F3 is a 0.7pF capacitor connected in series, and the fourth matching component of the fourth feed F4 is a 0.3pF capacitor connected in series. The third feed F3 excites the signal of the C-mode port of the second loop antenna (ABGHIJKLCD + MNO + PQR). The fourth feed F4 excites the signal of the D-mode port of the second loop antenna (ABGHIJKLCD + MNO + PQR).

To sum up, the signal of the C-mode port of the second loop antenna (ABGHIJKLCD + MNO + PQR) causes the antenna unit to form the antenna 1, and the signal of the D-mode port of the second loop antenna (ABGHIJKLCD + MNO + PQR) causes the antenna unit to form the antenna 2, so that the antenna unit can form two antennas. The different frequencies and the ECCs of the antenna 1 and the antenna 2 are different, which can be seen in table 10. And the isolation between the antenna 1 and the antenna 2 is more than 24.5dB, and the ECC is less than 0.0077. The third feed F3 can cover the N77+ N79 frequency band with the in-band efficiency of-3 dB, and the fourth feed F4 can cover the N77 frequency band with the in-band efficiency of-3.5 dB.

TABLE 10 ECC for antenna 1 and antenna 2

Frequency of	4.4	4.7	5
				ECC	0.0002	0.0035	0.0077

Fig. 21b shows a waveform diagram of the S parameters of the third feed F3 and the fourth feed F4 in fig. 21a in different operating frequency bands. In FIG. 21b, the abscissa is frequency in GHz and the ordinate is the input reflection coefficient S11, the reverse transmission coefficient S12/forward transmission coefficient S21 and the output reflection coefficient S22 in the S parameter in dB. As shown in FIG. 21b, curve 1 represents the input reflection coefficient S11 of the third feed F3, curve 2 represents the reverse transmission coefficient S12/forward transmission coefficient S21 of the third feed F3 and the fourth feed F4, and curve 3 represents the output reflection coefficient S22 of the fourth feed F4.

Fig. 21c shows a waveform diagram of the system efficiency and the radiation efficiency of the third feed F3 and the fourth feed F4 in fig. 21a, respectively. In fig. 21c, the abscissa is frequency in GHz and the ordinate is system efficiency in dB. As shown in fig. 21c, curve 1 represents the system efficiency of the third feed F3, curve 2 represents the radiation efficiency of the third feed F3, curve 3 represents the system efficiency of the fourth feed F4, and curve 4 represents the radiation efficiency of the fourth feed F4.

In summary, it can be seen from the above four embodiments that the antenna unit of the present application can realize two antennas with high isolation and low envelope correlation coefficient ECC under the excitation of the third feed F3 and the fourth feed F4 based on the same second annular branch 20.

In the second embodiment, the antenna unit is based on the symmetrical layout of the same loop antenna (i.e. the second loop branch and the feed branch), and the signal of the C-mode port and the signal of the D-mode port of the loop antenna are excited by two feed sources respectively, so that the signal of the C-mode port is self-offset at the D-mode port, the signal of the D-mode port is self-offset at the C-mode port, the signal isolation between the two ports is realized, the signal of the C-mode port and the signal of the D-mode port are mutually complementary in different radiation directions, thereby realizing two antennas with high isolation and low ECC, not only ensuring good antenna performance, the antenna unit can be fully utilized to realize various scenes in the limited space of the electronic equipment, and the electronic equipment can also comprise more antennas in the limited space, so that the utilization rate of the antenna space is improved.

Illustratively, the application also provides an electronic device. The electronic device of the present application may include: a printed circuit board and at least one antenna element. The electronic device includes, but is not limited to, a mobile phone, a headset, a tablet computer, a laptop computer, a wearable device, or a data card.

In the present application, any one of the antenna elements is grounded to the printed circuit board. The antenna unit may adopt a specific implementation manner in any one of the embodiments of fig. 1 to 21 c. For example, the electronic device may include an antenna unit implemented based on the description of the first embodiment, may also include an antenna unit implemented based on the description of the second embodiment, and may also include an antenna unit implemented based on the description of the first embodiment and an antenna unit implemented based on the description of the second embodiment, which is not limited in this application. Any one of the antenna units may be disposed on a frame of the electronic device, may also be disposed on a printed circuit board, and may also be disposed through a bracket, which is not limited in this application.

The electronic equipment comprises at least one antenna unit, wherein signals of a C-mode port and signals of a D-mode port of the same annular antenna in any one antenna unit are excited by two feed sources respectively, and the signals of the C-mode port and the signals of the D-mode port are self-offset at the D-mode port based on the electrically symmetrical arrangement of the antenna unit, so that the signals of the D-mode port are self-offset at the C-mode port, the signal isolation between the two ports is realized, the signals of the C-mode port and the signals of the D-mode port can be mutually complemented in different radiation directions, two antennas with high isolation and low envelope correlation coefficient ECC are realized based on the same annular antenna, good antenna performance is ensured, the electronic equipment can fully utilize the antenna unit to realize various scenes in a limited space, for example, the electronic equipment is applied to diversity antennas or multi-input multi-output (multi-input multi-output, MIMO) antenna and other multi-antenna scenes, directional diagram synthesis scenes, directional diagram switching scenes such as horizontal-vertical switching and the like, and the electronic equipment can contain more antennas in a limited space, so that the utilization rate of the antenna space is improved.