阅读说明：本技术 天线结构和电子设备 (Antenna structure and electronic device ) 是由 刘家荣 于 2020-03-18 设计创作，主要内容包括：本公开是关于一种天线结构和电子设备。天线结构包括：第一天线单元包括第一辐射体、金属导电层、第一馈电和第一调谐器,第一馈电连接至金属导电层的一端、金属导电层的另一端连接至第一调谐器和第一辐射体,第一辐射体上远离第一调谐器的一端接地；第二天线单元包括第二辐射体、第二馈电和第二调谐器,第二辐射体与第一辐射体之间相互靠近的端部之间形成天线缝隙,且第二辐射体远离第一辐射体的一端接地,第二调谐器连接至第二辐射体上靠近第一辐射体的一端；其中,第一调谐器用于调节第一天线单元的辐射频率、第二调谐器用于调节第二天线单元的辐射频率,以使得天线结构的辐射频率覆盖2G信号、3G信号、4G信号和5G信号所处的频段。(The present disclosure relates to an antenna structure and an electronic device. The antenna structure includes: the first antenna unit comprises a first radiating body, a metal conducting layer, a first feed and a first tuner, wherein the first feed is connected to one end of the metal conducting layer, the other end of the metal conducting layer is connected to the first tuner and the first radiating body, and one end, far away from the first tuner, of the first radiating body is grounded; the second antenna unit comprises a second radiator, a second feed and a second tuner, an antenna gap is formed between the end parts, close to each other, of the second radiator and the first radiator, one end, far away from the first radiator, of the second radiator is grounded, and the second tuner is connected to one end, close to the first radiator, of the second radiator; the first tuner is used for adjusting the radiation frequency of the first antenna unit, and the second tuner is used for adjusting the radiation frequency of the second antenna unit, so that the radiation frequency of the antenna structure covers the frequency bands where the 2G signal, the 3G signal, the 4G signal and the 5G signal are located.)

1. An antenna structure, comprising:

the antenna comprises a first antenna unit, a second antenna unit and a third antenna unit, wherein the first antenna unit comprises a first radiating body, a metal conducting layer, a first feed and a first tuner, the first feed is connected to one end of the metal conducting layer, the other end of the metal conducting layer is connected to the first tuner and the first radiating body, and one end, far away from the first tuner, of the first radiating body is grounded;

the second antenna unit comprises a second radiator, a second feed and a second tuner, an antenna gap is formed between the end parts, close to each other, of the second radiator and the first radiator, one end, far away from the first radiator, of the second radiator is grounded, and the second tuner is connected to one end, close to the first radiator, of the second radiator;

the first tuner is used for adjusting the radiation frequency of the first antenna unit, and the second tuner is used for adjusting the radiation frequency of the second antenna unit, so that the radiation frequency of the antenna structure covers the frequency bands where 2G signals, 3G signals, 4G signals and 5G signals are located.

2. The antenna structure according to claim 1, wherein the first tuner comprises a plurality of working channels, each working channel comprising a capacitance and a switching element in series with the capacitance, the capacitance of each working channel being connected to ground, the switching element being connected to the metallic conductive layer;

wherein the first tuner adjusts a radiation frequency of the first antenna element by switching a switching state of a switching element in the plurality of operating channels.

3. The antenna structure of claim 2, wherein the first tuner comprises:

a first working channel comprising a first capacitor and a first switch component in series with the first capacitor, the first capacitor being grounded and the first switch component being connected to the metal conductive layer;

a second working channel comprising a second capacitor and a second switch component in series with the second capacitor, the second capacitor being grounded and the second switch component being connected to the metal conductive layer;

a third working channel comprising a third capacitor and a third switching component in series with the third capacitor, the third capacitor being connected to ground, the third switching component being connected to the metal conductive layer;

wherein the first tuner adjusts a radiation frequency of the first antenna element by switching states of the first, second, and third switching components.

4. The antenna structure according to claim 3,

when the first switch component is in a closed state and the second switch component and the third switch component are in an open state, the first antenna unit covers a frequency band of 890-960 MHz and a frequency band of 3400-3600 MHz;

when the second switch component is in a closed state and the first switch component and the third switch component are in an open state, the first antenna unit covers a 790MHz-894MHz frequency band and a 3400MHz-3600MHz frequency band;

when the third switch component is in a closed state and the first switch component and the second switch component are in an open state, the first antenna unit covers a 700MHz-800MHz frequency band and a 3400MHz-3600MHz frequency band.

5. The antenna structure according to claim 3, characterized in that the capacitance value of the first capacitor is 0.5pF, the capacitance value of the second capacitor is 1.3pF and the capacitance value of the third capacitor is 2.5 pF.

6. The antenna structure of claim 1, wherein the first antenna element further comprises a matching circuit connected to both the first feed and the radio frequency front end, the matching circuit for matching an impedance of the first antenna element.

7. The antenna structure according to claim 6, characterized in that the matching circuit comprises a first inductance, one end of which is connected to ground and the other end is connected between the first feed and the radio frequency front end.

8. The antenna structure of claim 1, wherein the second tuner comprises:

one end of the adjustable capacitor is connected to the second feed, and the other end of the adjustable capacitor is connected to the radio frequency front end;

a plurality of inductors, each of the plurality of inductors being coupled to ground;

a plurality of switching components, each inductor being in series with at least one switching component, the at least one switching component being connected between the second feed and the radio frequency front end;

the second tuner switches the working state of the second tuner by adjusting the switching states of the plurality of switching elements and the capacitance value of the adjustable capacitor, and when the second tuner is in different working states, the radiation frequency of the second antenna unit is different.

9. The antenna structure according to claim 8, characterized in that the second tuner comprises a second inductance, a third inductance, a fourth switching component in series with the second inductance, a fifth switching component in series with the third inductance and a sixth switching component in series with the fourth inductance, the second, third and fourth inductances being all connected to ground, the fourth, fifth and sixth switching components being connected between the second feed and the radio frequency front end, respectively;

the second tuner adjusts the switching states of the fourth switching component, the fifth switching component and the sixth switching component and the capacitance value switching working state of the adjustable capacitor, so as to adjust the radiation frequency of the second antenna unit.

10. The antenna structure according to claim 9,

when the fourth switch component is in a closed state and the fifth switch component and the sixth switch component are in an open state, the second tuner is in a first working state, and the radiation frequency of the second antenna unit covers 1710MHz-1920MHz frequency bands and 4800MHz-4900MHz frequency bands;

when the sixth switch component is in a closed state and the fourth switch component and the fifth switch component are in an open state, the second tuner is in a second working state, and the radiation frequency of the second antenna unit covers a 1920MHz-2170MHz frequency band and a 4800MHz-4900MHz frequency band;

when the fourth switch assembly, the fifth switch assembly and the sixth switch assembly are all in an off state, the second tuner is in a third working state, and the radiation frequency of the second antenna unit covers a 2300MHz-2400MHz frequency band;

when the fifth switch component is in a closed state, and the fourth switch component and the sixth switch component are in an open state, the second tuner is in a fourth working state, and the radiation frequency of the second antenna unit covers a frequency band of 2500MHz-2690 MHz.

11. The antenna structure according to claim 10, wherein the inductance value of the second inductor is 3.3nH, the inductance value of the third inductor is 15nH, and the inductance value of the fourth inductor is 3.3 nH;

when the second tuner is in the first working state, the capacitance value of the adjustable capacitor is 10 pF;

when the second tuner is in the second working state, the capacitance value of the adjustable capacitor is 2.6 pF;

when the second tuner is in the third working state, the capacitance value of the adjustable capacitor is 1.3 pF;

and when the second tuner is in the fourth working state, the capacitance value of the adjustable capacitor is 0.8 pF.

12. The antenna structure of claim 1, wherein a portion of the metal conductive layer is disposed parallel to a portion of the first radiator.

13. The antenna structure of claim 12, wherein a sum of lengths of the metal conductive layer and the first radiator is greater than or equal to 80 mm.

14. The antenna structure of claim 1, wherein a width of an antenna slot between the first radiator and the second radiator is greater than or equal to 0.5 mm.

15. The antenna structure according to claim 1, characterized in that the second antenna element is in the form of an IFA.

16. The antenna structure according to claim 1, characterized in that the length of the second antenna element is greater than or equal to 20 mm.

17. An electronic device, comprising:

a metal middle frame;

the antenna structure of any one of claims 1-16, wherein the first radiator and the second radiator in the antenna structure are part of the metal bezel.

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to an antenna structure and an electronic device.

Background

As a new generation of communication protocol standard, 5G (5th generation mobile networks) technology has gradually started to enter the public. In order to enable the electronic device to support three operator networks under the 5G protocol standard and improve the market share of the electronic device, how to set the antenna structure of the electronic device to achieve the full-band coverage of the 5G communication technology has become a focus point and a breakthrough point of designers.

Disclosure of Invention

The present disclosure provides an antenna structure and an electronic device to solve the disadvantages of the related art.

According to a first aspect of embodiments of the present disclosure, there is provided an antenna structure, comprising:

the antenna comprises a first antenna unit, a second antenna unit and a third antenna unit, wherein the first antenna unit comprises a first radiating body, a metal conducting layer, a first feed and a first tuner, the first feed is connected to one end of the metal conducting layer, the other end of the metal conducting layer is connected to the first tuner and the first radiating body, and one end, far away from the first tuner, of the first radiating body is grounded;

the second antenna unit comprises a second radiator, a second feed and a second tuner, an antenna gap is formed between the end parts, close to each other, of the second radiator and the first radiator, one end, far away from the first radiator, of the second radiator is grounded, and the second tuner is connected to one end, close to the first radiator, of the second radiator;

the first tuner is used for adjusting the radiation frequency of the first antenna unit, and the second tuner is used for adjusting the radiation frequency of the second antenna unit, so that the radiation frequency of the antenna structure covers the frequency bands where 2G signals, 3G signals, 4G signals and 5G signals are located.

Optionally, the first tuner includes a plurality of working channels, each working channel includes a capacitor and a switch component connected in series with the capacitor, the capacitor of each working channel is grounded, and the switch component is connected to the metal conductive layer;

wherein the first tuner adjusts a radiation frequency of the first antenna element by switching a switching state of a switching element in the plurality of operating channels.

Optionally, the first tuner includes:

a first working channel comprising a first capacitor and a first switch component in series with the first capacitor, the first capacitor being grounded and the first switch component being connected to the metal conductive layer;

a second working channel comprising a second capacitor and a second switch component in series with the second capacitor, the second capacitor being grounded and the second switch component being connected to the metal conductive layer;

a third working channel comprising a third capacitor and a third switching component in series with the third capacitor, the third capacitor being connected to ground, the third switching component being connected to the metal conductive layer;

wherein the first tuner adjusts a radiation frequency of the first antenna element by switching states of the first, second, and third switching components.

Optionally, when the first switch assembly is in a closed state and the second switch assembly and the third switch assembly are in an open state, the first antenna unit covers an 890MHz-960MHz frequency band and a 3400MHz-3600MHz frequency band;

when the second switch component is in a closed state and the first switch component and the third switch component are in an open state, the first antenna unit covers a 790MHz-894MHz frequency band and a 3400MHz-3600MHz frequency band;

when the third switch component is in a closed state and the first switch component and the second switch component are in an open state, the first antenna unit covers a 700MHz-800MHz frequency band and a 3400MHz-3600MHz frequency band.

Optionally, the capacitance value of the first capacitor is 0.5pF, the capacitance value of the second capacitor is 1.3pF, and the capacitance value of the third capacitor is 2.5 pF.

Optionally, the first antenna element further includes a matching circuit, the matching circuit is connected to both the first feed and the radio frequency front end, and the matching circuit is configured to match an impedance of the first antenna element.

Optionally, the matching circuit includes a first inductor, and one end of the first inductor is grounded, and the other end of the first inductor is connected between the first feed and the radio frequency front end.

Optionally, the second tuner includes:

one end of the adjustable capacitor is connected to the second feed, and the other end of the adjustable capacitor is connected to the radio frequency front end;

a plurality of inductors, each of the plurality of inductors being coupled to ground;

a plurality of switching components, each inductor being in series with at least one switching component, the at least one switching component being connected between the second feed and the radio frequency front end;

the second tuner switches the working state of the second tuner by adjusting the switching states of the plurality of switching elements and the capacitance value of the adjustable capacitor, and when the second tuner is in different working states, the radiation frequency of the second antenna unit is different.

Optionally, the second tuner includes a second inductor, a third inductor, a fourth switch component connected in series with the second inductor, a fifth switch component connected in series with the third inductor, and a sixth switch component connected in series with the fourth inductor, the second inductor, the third inductor, and the fourth inductor are all grounded, and the fourth switch component, the fifth switch component, and the sixth switch component are respectively connected between the second feed and the radio frequency front end;

the second tuner adjusts the switching states of the fourth switching component, the fifth switching component and the sixth switching component and the capacitance value switching working state of the adjustable capacitor, so as to adjust the radiation frequency of the second antenna unit.

Optionally, when the fourth switch component is in a closed state, and the fifth switch component and the sixth switch component are in an open state, the second tuner is in a first working state, and the radiation frequency of the second antenna unit covers a 1710MHz-1920MHz frequency band and a 4800MHz-4900MHz frequency band;

when the sixth switch component is in a closed state and the fourth switch component and the fifth switch component are in an open state, the second tuner is in a second working state, and the radiation frequency of the second antenna unit covers a 1920MHz-2170MHz frequency band and a 4800MHz-4900MHz frequency band;

when the fourth switch assembly, the fifth switch assembly and the sixth switch assembly are all in an off state, the second tuner is in a third working state, and the radiation frequency of the second antenna unit covers a 2300MHz-2400MHz frequency band;

when the fifth switch component is in a closed state, and the fourth switch component and the sixth switch component are in an open state, the second tuner is in a fourth working state, and the radiation frequency of the second antenna unit covers a frequency band of 2500MHz-2690 MHz.

Optionally, an inductance value of the second inductor is 3.3nH, an inductance value of the third inductor is 15nH, and an inductance value of the fourth inductor is 3.3 nH;

when the second tuner is in the first working state, the capacitance value of the adjustable capacitor is 10 pF;

when the second tuner is in the second working state, the capacitance value of the adjustable capacitor is 2.6 pF;

when the second tuner is in the third working state, the capacitance value of the adjustable capacitor is 1.3 pF;

and when the second tuner is in the fourth working state, the capacitance value of the adjustable capacitor is 0.8 pF.

Optionally, a portion of the metal conductive layer is disposed in parallel with a portion of the first radiator.

Optionally, the sum of the lengths of the metal conductive layer and the first radiator is greater than or equal to 80 mm.

Optionally, the width of the antenna slot between the first radiator and the second radiator is greater than or equal to 0.5 mm.

Optionally, the second antenna unit is in the form of IFA.

Optionally, the length of the second antenna unit is greater than or equal to 20 mm.

According to a second aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including:

a metal middle frame;

the antenna structure according to any of the preceding embodiments, wherein the first radiator and the second radiator in the antenna structure are part of the metal middle frame.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

known from the above embodiment, the antenna structure in this disclosure can make the antenna structure compatible with each frequency band of 2-5G antenna signals through the combined action of the first tuner and the second tuner, and the elements included in the antenna structure can be arranged in a tiled manner, which can avoid stacking of the elements and affect the internal space of the electronic device configured with the antenna structure, and the antenna structure only includes one antenna slot, thereby reducing the effect on the appearance surface configured with the antenna structure and being beneficial to the structural strength.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating an arrangement of antenna structures within an electronic device according to an exemplary embodiment.

Fig. 2 is a simplified schematic diagram illustrating an antenna structure in accordance with an exemplary embodiment.

Fig. 3 is a circuit block diagram of a first tuner shown according to an exemplary embodiment.

Fig. 4 is a graph illustrating return loss of a first antenna element according to an exemplary embodiment.

Fig. 5 is a graph illustrating antenna efficiency of a first antenna element according to an exemplary embodiment.

Fig. 6 is a circuit configuration diagram illustrating a first tuner and matching circuit according to an exemplary embodiment.

Fig. 7 is a circuit configuration diagram illustrating a second tuner according to an exemplary embodiment.

Fig. 8 is a graph illustrating return loss for a second antenna element according to an exemplary embodiment.

Fig. 9 is a graph illustrating antenna efficiency of a second antenna element according to an exemplary embodiment.

Fig. 10 is a graph illustrating isolation of an antenna structure in one operating state according to an exemplary embodiment.

Fig. 11 is a simplified schematic diagram illustrating another antenna structure in accordance with an example embodiment.

Fig. 12 is a schematic structural diagram of an electronic device according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Fig. 1 is a schematic diagram illustrating an arrangement of an antenna structure within an electronic device according to an exemplary embodiment, and fig. 2 is a simplified schematic diagram illustrating an antenna structure according to an exemplary embodiment. As shown in fig. 1 and fig. 2, the antenna structure 100 may include a first antenna unit 101 and a second antenna unit 102, where the first antenna unit 101 and the second antenna unit 102 may respectively radiate radiation signals in different frequency bands, so that the radiation signals of the antenna structure 100 may cover the frequency bands where 2G signals, 3G signals, 4G signals, and 5G signals are located, and an electronic device configured with the antenna structure 100 may be compatible with 2G, 3G, 4G, and 5G communication modes.

Still referring to fig. 1 and 2, the first antenna element 101 may include a first radiator 1, a metal conductive layer 2, a first feed 3, and a first tuner 4. The first feed 3 is connected to one end of the metal conductive layer 2, the other end of the metal conductive layer 2 is connected to the first tuner 4 and the first radiator 1, and one end of the first radiator 1 far from the first tuner 4 is grounded. Wherein the first tuner 4 may be used to adjust the radiation frequency of the first antenna element 101. The second antenna unit 102 may include a second radiator 5, a second feed 6, and a second tuner 7, an antenna slot 103 may be formed between the ends of the second radiator 5 and the first radiator 1, which are close to each other, and a non-metal material such as plastic may be injected into the antenna slot 103. The end of the second radiator 5 away from the first radiator 1 may be grounded, and the second tuner 7 is connected to the end of the second radiator 5 disposed close to the first radiator 1. For example, as shown in fig. 1, a separation distance between the second tuner 7 and an end of the second radiator 5 close to the first radiator 1 is located within a preset separation distance, or the second tuner 7 may be connected to an end of the second radiator 5 close to the first radiator 1, which may be specifically designed as needed, and the disclosure is not limited thereto, and the second tuner 7 may adjust the radiation frequency of the second antenna unit 102, so that the first tuner 4 and the second tuner 7 may adjust the radiation frequencies of the first antenna unit 101 and the second antenna unit 102, respectively, so that the antenna structure 100 may radiate antenna signals of 2 to 5G.

In this embodiment, when the antenna structure 100 is disposed in an electronic device, both the first radiator 1 and the second radiator 5 may be edge portions of a metal middle frame of the electronic device, and at this time, the metal middle frame may serve as a system ground of the antenna structure 100, in order to achieve normal operation of the antenna structure 100, the metal conductive layer 2 needs to be suspended above the system ground, and the height may be greater than or equal to 0.5mm, for example, a spacing distance between the metal conductive layer 2 and the system ground may be 0.8mm, 1mm, 1.5mm, or 2mm, and the like, which may be specifically designed as needed. Further, in an embodiment, the length dimension of the metalized conductive layer 2 may be 40mm, the width dimension may be 2mm, and the thickness dimension may be 0.1mm, and of course, the specific dimension of the metalized conductive layer 2 may also be adjusted according to specific situations, which is not limited by the present disclosure. The first radiator 1 and the second radiator 5 may be connected to a metal middle frame as a system ground, and in order to achieve sufficient radiation performance, the first radiator 1 and the second radiator 5 both need a predetermined clearance, and the size of the clearance may be greater than or equal to 0.5mm, for example, may be 0.8mm, 1mm, 1.5mm, or 2mm, and may be specifically designed as needed.

It can be known from the foregoing embodiments that the antenna structure 100 in the present disclosure can make the antenna structure 100 compatible with each frequency band of 2-5G antenna signals through the combined action of the first tuner 3 and the second tuner 7, and the elements included in the antenna structure 100 can be arranged in a tiled manner, so as to avoid stacking of the elements and influence on the internal space of the electronic device configuring the antenna structure 100, and the antenna structure 100 includes only one antenna slot, so that the influence on the external appearance of the antenna structure 100 is reduced, and the structural strength is facilitated.

In order to explain how the antenna structure 100 adjusts the radiation frequency in the present disclosure, the specific structure of the first tuner 4 and the second tuner 7 will be described in detail below.

As shown in fig. 3, the first tuner 4 may include a plurality of working channels, each working channel may include a capacitor and a switch element connected in series with the capacitor, each working channel includes a capacitor connected to ground, and the switch element is connected to the metal conductive layer, so that the first tuner 4 may adjust the radiation frequency of the first antenna element 101 by switching the switch state of the switch element in the plurality of working channels.

For example, and as also shown in fig. 3, the first tuner 4 may include a first working channel 41, a second working channel 42, and a third working channel 43. Wherein the first working channel 41 may include a first capacitor 411 and a first switching component 412 in series with the first capacitor 411, the second working channel 42 may include a second capacitor 421 and a second switching component 422 in series with the second capacitor 421, and the third working channel 43 may include a third capacitor 431 and a third switching component 432 in series with the third capacitor 431. The first capacitor 411, the second capacitor 421 and the third capacitor 431 are grounded, and the first switch component 412, the second switch component 422 and the third switch component 432 are connected to the metal conductive layer 2. The first tuner 4 can adjust the radiation frequency of the first antenna element 101 by switching the switching states of the first switching element 412, the second switching element 422, and the third switching element 432.

Wherein the first antenna unit 101 may cover 890MH-960MHz band and 3400MHz-3600MHz band when the first switch component 412 is in a closed state and the second switch component 422 and the third switch component 432 are in an open state; when the second switch component 422 is in a closed state and the first switch component 412 and the third switch component 432 are in an open state, the first antenna unit 101 can cover a 790MHz-894MHz frequency band and a 3400MHz-3600MHz frequency band; when the third switch component 432 is in a closed state and the first switch component 412 and the second switch component 422 are in an open state, the first antenna unit 101 covers a 700MHz-800MHz frequency band and a 3400MHz-3600MHz frequency band. Thus, the first antenna element 101 can be made to cover the 700MHz-960 MHz and the N78(3400MHz-3600MHz) band of Sub-6 by the frequency modulation action of the first tuner 3.

It should be noted that: the first tuner 4 includes the first working channel 41, the second working channel 42, and the third working channel 43 for example, but in other embodiments, the first tuner 4 may include four or more working channels, and the disclosure is not limited thereto. Moreover, the capacitance of each working channel capacitor can be configured according to the frequency modulation requirement, for example, in an embodiment, the capacitance of the first capacitor 411 is 0.5pF, the capacitance of the second capacitor 421 is 1.3pF, and the capacitance of the third capacitor 431 is 2.5 pF. Of course, in other embodiments, the first capacitor 411 may also be 1pF or other values, and the similar second capacitor 421 and third capacitor 431 may also be other capacitance values, which may be designed as needed, and the disclosure does not limit this.

Taking the first tuner 4 including the first working channel 41, the second working channel 42 and the third working channel 43, the capacitance value of the first capacitor 411 being 0.5pF, the capacitance value of the second capacitor 421 being 1.3pF, and the capacitance value of the third capacitor 431 being 2.5pF, a return loss curve of the first antenna element 101 as shown in fig. 4 and an antenna efficiency curve of the first antenna element 101 as shown in fig. 5 can be obtained.

As shown in fig. 4, curves S1, S2 and S3 respectively show return loss curves of the first antenna unit 101 when the antenna unit radiates 890MH-960MHz band, 3400MHz-3600MHz band, 790MHz-894MHz band, 3400MHz-3600MHz band, 700MHz-800MHz band and 3400MHz-3600MHz band, that is, a curve S1 is a return loss curve when the first working channel 41 of the first tuner 4 is in an operating state, a curve S2 is a return loss curve when the second working channel 42 of the first tuner 4 is in an operating state, and a curve S3 is a return loss curve when the third working channel 43 of the first tuner 4 is in an operating state. As shown by the curves S1, S2, and S3, the return loss of the first antenna element 101 is all above-10 dB, the matching degree of the first antenna element 101 is high, and the antenna performance is good.

As shown in fig. 5, when the first operating channel 41 in the first tuner 4 is in an operating state, the first antenna unit 101 covers a frequency band of 890MHz to 960MHz, and the antenna efficiency of the first antenna unit 101 is shown as a curve S4 in fig. 5; when the second operating channel 42 in the first tuner 4 is in an operating state, the first antenna unit 101 covers a frequency band from 790MHz to 894MHz, and at this time, the antenna efficiency of the first antenna unit 101 is shown as a curve S5 in fig. 5; when the third operating channel 43 in the first tuner 4 is in an operating state, the first antenna unit 101 covers a frequency band of 700MHz to 800MHz, and the antenna efficiency of the first antenna unit 101 is shown as a curve S6 in fig. 5. As shown by the curve S4, the curve S5, and the curve S6, the antenna efficiency of the first antenna element 101 is above-8 dB in the low frequency band of 700MHz-960 MHz, and the antenna efficiency of the first antenna element 101 is above-6 dB in the N78 frequency band (3400MHz-3600MHz), which can meet the performance requirement of the general communication terminal on the antenna.

In the above embodiments, in order to perform impedance matching on the first antenna element 101, as shown in fig. 6, the first antenna element 101 may further include a matching circuit 8, where the matching circuit 8 may be connected to both the radio frequency front end 104 corresponding to the antenna structure 100 and the first feed 3, and the matching circuit 8 is configured to match the impedance of the first antenna element 101, for example, the impedance of the feed point end of the first feed 3 may be matched to 50 ohms or more, so as to improve the radiation effect of the first antenna element 101. For example, as shown in fig. 6, the matching circuit 8 may include a first inductor 81, one end of the first inductor 81 is grounded, and the other end is connected between the first feed 3 and the rf front end 104, and the inductance value of the first inductor 81 may be 8 nH. Of course, in this embodiment, only the matching circuit 8 including the first inductor 81 is taken as an example for explanation, in other embodiments, the circuit structure of the matching circuit 8 may be designed according to debugging requirements, for example, two or more inductors may be provided, and the disclosure does not limit this. Moreover, in other embodiments, the inductance value of the first inductor 81 may also be designed according to debugging requirements, for example, may be 10nH, or 12nH, etc., which is not limited by the present disclosure.

As shown in fig. 7, the second tuner 7 may include an adjustable capacitor 71, a plurality of inductors 72, and a plurality of switch components 73, each inductor of the plurality of inductors 72 is connected in series with one or more switch components, each inductor of the plurality of inductors 72 is connected to ground, and at least one switch component is connected between the second feed 6 and the rf front end 105 corresponding to the second antenna unit 102. Therefore, the second tuner 7 can switch the operating state of the second tuner 7 by adjusting the switching state of the plurality of switching elements 73 and the capacitance value of the adjustable capacitor 71, and when the second tuner 7 is in different operating states, the radiation frequency of the second antenna unit 102 is also different, so that the second tuner 7 can be configured such that the second antenna unit 102 covers the 1710-2690MHz frequency band and the N41(2515MHz-2675MHz) and N79(4800MHz-4900MHz) frequency bands of Sub-6.

For example, still referring to fig. 7, the plurality of inductors 72 may include a second inductor 721, a third inductor 722, and a fourth inductor 723, and the plurality of switching elements 73 may include a fourth switching element 731, a fifth switching element 732, and a sixth switching element 733. Wherein, the second inductor 721 is connected in series with the fourth switching component 731, the third inductor 722 is connected in series with the fifth switching component 732, the fourth inductor 723 is connected in series with the sixth switching component 733, the second inductor 721, the third inductor 722 and the fourth inductor 723 are respectively connected to the ground, and the fourth switching component 731, the fifth switching component 732 and the sixth switching component 733 are respectively connected between the second feed 6 and the rf front end 105. The second tuner 7 can switch the working state of the second tuner 7 by adjusting the switching states of the fourth switching component 731, the fifth switching component 732, and the sixth switching component 733, and the capacitance value of the adjustable capacitor 71, and adjust the electronic component connected between the second feed 6 and the rf front end 105, so as to adjust the radiation frequency of the second antenna unit 102.

For example, when the fourth switching component 731 is in a closed state, and the fifth switching component 732 and the sixth switching component 733 are in an open state, the second tuner 7 is in a first working state, and the radiation frequency of the second antenna unit 102 covers the 1710MHz to 1920MHz frequency band and the 4800MHz to 4900MHz frequency band at this time; when the sixth switch component 733 is in a closed state and the fourth switch component 731 and the fifth switch component 732 are in an open state, the second tuner 7 is in a second working state, and the radiation frequency of the second antenna unit 102 covers a frequency band of 1920MHz to 2170MHz and a frequency band of 4800MHz to 4900 MHz; when the fourth switching component 731, the fifth switching component 732 and the sixth switching component 733 are all in the off state, the second tuner 7 is in the third working state, and the radiation frequency of the second antenna unit 102 covers the 2300MHz-2400MHz frequency band; when the fifth switch component 732 is in the closed state and the fourth switch component 731 and the sixth switch component 733 are in the open state, the second tuner 7 is in the fourth operating state, and the radiation frequency of the second antenna unit 105 covers the frequency band from 2500MHz to 2690MHz, so that the radiation frequency of the second antenna unit 102 covers.

In this embodiment, the inductance values of the second inductor 721, the third inductor 722 and the fourth inductor 723 and the capacitance values of the adjustable capacitors when the second tuner 7 is in different operating states may all be determined according to actual debugging conditions. For example, in one embodiment, the inductance of the second inductor 721 is 3.3nH, the inductance of the third inductor 722 is 15nH, and the inductance of the fourth inductor 723 is 3.3 nH; when the second tuner 7 is in the first operating state, the capacitance value of the adjustable capacitor 71 is 10 pF; when the second tuner 7 is in the second operating state, the capacitance value of the adjustable capacitor 71 is 2.6 pF; when the second tuner 7 is in the third operating state, the capacitance value of the adjustable capacitor 71 is 1.3 pF; in the fourth operating state of the second tuner 7, the capacitance of the tunable capacitor 71 is 0.8 pF. Of course, the inductance values of the second inductor 721, the third inductor 722 and the fourth inductor 723 and the capacitance values of the adjustable capacitors when the second tuner 7 is in different operating states can be determined as other values according to practical situations. Of course, in other embodiments, the second tuner 7 may also include two or more adjustable capacitors, which may be specifically designed as needed; similarly, the second tuner 7 may also include four or more switch sets, and the second tuner 7 may also include four or more inductors, which may be designed as needed, and the disclosure does not limit this.

The second tuner 7 includes a second inductor 721, a third inductor 722, a fourth inductor 723, a fourth switching element 731, a fifth switching element 732 and a sixth switching element 733, the inductance of the second inductor 721 is 3.3nH, the inductance of the third inductor 722 is 15nH, the inductance of the fourth inductor 723 is 3.3nH, and the capacitance of the adjustable capacitor 71 in the first working state is 10 pF; in the second operating state, the capacitance of the adjustable capacitor 71 is 2.6 pF; in the third operating state, the capacitance of the adjustable capacitor 71 is 1.3 pF; in the fourth operating state, the capacitance value of the adjustable capacitor 71 is 0.8pF, for example, so that the return loss curve of the second antenna element 102 shown in fig. 8 and the antenna efficiency curve of the second antenna element 102 shown in fig. 9 can be obtained.

As shown in fig. 8, a return loss curve when the second tuner 7 is in the first operation state is shown as a curve L1, a return loss curve when the second tuner 7 is in the second operation state is shown as a curve L2, a return loss curve when the second tuner 7 is in the third operation state is shown as a curve L3, and a return loss curve when the second tuner 7 is in the fourth operation state is shown as a curve L4. As shown by the curve L1, the curve L2, the curve L3, and the curve L4, the return loss of the second antenna unit 102 is higher than-10 dB, and the second antenna unit 102 has a good matching degree in the first operating state, the second operating state, the third operating state, and the fourth operating state, and better covers the frequency range of 1710MHz to 2690MHz and 48000MHz to 4900 MHz.

As shown in fig. 9, an antenna efficiency curve when the second tuner 7 is in the first operation state is shown by a curve L5, an antenna efficiency curve when the second tuner 7 is in the second operation state is shown by a curve L6, an antenna efficiency curve when the second tuner 7 is in the third operation state is shown by a curve L7, and an antenna efficiency curve when the second tuner 7 is in the fourth operation state is shown by a curve L8. As shown by the curve L5, the curve L6, the curve L7 and the curve L8, when the second tuner 7 is in the first operating state, the second operating state, the third operating state and the fourth operating state, the antenna efficiency of the second antenna unit 102 is above-5 dB, and the antenna performance requirement of the general electronic device communication can be satisfied.

In the above embodiments, the first antenna element 101 and the second antenna element 102 are separated by only the antenna slot 103, and the width of the antenna slot 103 is small, so that in the case where the first tuner provided in the present disclosure is not provided, it is inevitable that approximately the resonance of the high-order mode of the first antenna element 101 falls within the frequency range supported by the second antenna element 102, causing a problem of signal interference between the first antenna element 101 and the second antenna element 102.

And, as in the embodiment of the present disclosure, the first tuner 4 is provided on the first radiator 1 of the first antenna element 101 at an end close to the second radiator 5, when any one of the first working channel 41, the second working channel 42 and the third working channel 43 included in the first tuner 4 is in an operating state, the first antenna element 101 may be loaded with a capacitor, on the one hand, the coverage frequency band of the first antenna element 101 is switched by different capacitors on the first working channel 41, the second working channel 42 and the third working channel 43, on the other hand, for high frequency signals, the parallel capacitor is equivalent to a short circuit, for the second antenna element 102, therefore, the capacitance loaded in parallel on the first antenna element 101 has the equivalent effect of short-circuiting the high-order mode resonance of the first antenna element 101 to ground, the influence of the higher-order mode resonance of the first antenna element 101 on the second antenna element 102 can be reduced. Similarly, in the first antenna element 101, the parallel loading capacitor has an equivalent effect of short-circuiting the high-order mode resonance of the second antenna element 102 to the ground, so that the influence of the high-order mode resonance of the second antenna element 102 on the first antenna element 101 can be reduced. In other words, the effect of the parallel loading capacitance in the first working channel 41, the second working channel 42 and the third working channel 43 is equivalent to adding a ground for isolation between the first antenna element 101 and the second antenna element 102, and the isolation effect is more obvious when the capacitance value of the parallel loading capacitance is larger.

Taking the capacitance value of the first capacitor 411 of the first working channel 41 as 0.5pF, the capacitance value of the second capacitor 421 of the second working channel 42 as 1.3pF, and the capacitance value of the third capacitor 431 of the third working channel 43 as 2.5pF as examples, the isolation curves of the second antenna unit 102 in the first working state and the second fourth working state when the third working channel 43 of the first tuner 4 in the first antenna unit 101 is in the working state are obtained. As shown in fig. 10, a curve S7 represents an isolation curve when the third operating channel 43 of the first tuner 4 in the first antenna unit 101 is in an operating state and the second antenna unit 102 is in the first operating state, a curve S8 represents an isolation curve when the third operating channel 43 of the first tuner 4 in the first antenna unit 101 is in an operating state and the second antenna unit 102 is in the fourth operating state, and a curve S9 represents an isolation curve when the third operating channel 43 of the first tuner 4 in the first antenna unit 101 is in an operating state and the second antenna unit 102 is in the second operating state. As can be seen from the curves S7, S8, and S8, the isolation between the first antenna element 101 and the second antenna element 102 is less than-10 dB, which provides a good isolation effect.

Based on the technical solution of the present disclosure, as shown in fig. 11, a portion of the metal conductive layer 2 is disposed in parallel with a portion of the first radiator 1, and since one end of the metal conductive layer 2 is connected to one end of the first radiator 1, the other end of the metal conductive layer 2 may extend toward the other end of the first radiator 1, so that the metal conductive layer 2 and the first radiator 1 together form an annular LOOP path, and the coverage frequency band of the first antenna unit 101 may be adjusted by adjusting the length of the LOOP path. In this embodiment, the total length of the metal conductive layer 2 and the first radiator 1 may be greater than or equal to 80 mm. For example, in an embodiment, the total length of the metal conductive layer 2 and the first radiator 1 may be equal to 92. Of course, in other embodiments, the total length of the metal conductive layer 2 and the first radiator 1 may be equal to 92mm, 98mm, 100mm, 108mm, or the like, which may be determined according to practical debugging, and the disclosure does not limit this. After determining the total length of the metal conductive layer 2 and the first radiator 1, the lengths of the metal conductive layer 2 and the first radiator 1 may be determined by tuning respectively. For example, when the total length of the metal conductive layer 2 and the first radiator 1 is equal to 92mm, the length of the metal conductive layer 2 may be 40mm, the width thereof may be 2mm, and the length of the first radiator 1 may be 52mm, although in other embodiments, the length of the metal conductive layer 2 may also be equal to 45mm, and the length of the first radiator 1 may be equal to 47mm, which may be specifically designed as needed, and the disclosure is not limited thereto.

In an embodiment, the second antenna unit 102 may adopt an IFA antenna form, and the total length of the second antenna unit 102 is greater than or equal to 20mm, for example, in an embodiment, the total length of the second antenna unit 102 is equal to 26mm, or in other embodiments, the total length of the second antenna unit 102 may be equal to 28mm or 33mm, and the like, which may be determined according to practical debugging, and is not limited by the present disclosure. The width of the antenna slot 103 between the second radiator 5 on the second antenna unit 102 and the first radiator 1 on the first antenna unit 101 cannot be too large or too small, generally, the width of the antenna slot 103 may be greater than or equal to 0.5mm, for example, the width of the antenna slot 103 may be equal to 0.8mm, 1.3mm, 1.5mm, and the like, which may be determined specifically according to practical debugging, and the disclosure does not limit this.

Based on the technical solution of the present disclosure, as shown in fig. 12, an electronic device 200 is further provided, where the electronic device 200 may include a metal middle frame 201 and the antenna structure 100 described in any of the above embodiments, and the first radiator 1 and the second radiator 5 included in the antenna structure 100 are both part of the metal middle frame 201, so as to radiate through the metal middle frame 201, and implement communication of the electronic device 200. The antenna slot 103 formed by the metal middle frame 201 may be filled with a non-metal material such as plastic. The electronic device 200 may include devices such as a mobile phone terminal, a tablet terminal, and an electronic reader, and the disclosure is not limited thereto.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.