阅读说明：本技术 天线结构及具有该天线结构的电子设备 (Antenna structure and electronic equipment with same ) 是由 许倬纲 贺敏慧 于 2020-04-10 设计创作，主要内容包括：本发明提供一种电子设备的天线结构,包括框体、第一馈入点、第一切换点及第二切换点,所述框体至少部分由金属材料制成,所述框体上开设有第一缝隙及有第二缝隙,所述第一缝隙与所述第二缝隙之间的所述框体形成一第一辐射部,所述第一馈入点电连接至一第一馈电点,以为所述第一辐射部馈入电流信号,所述第一切换点及所述第二切换点分别设置于所述框体并相邻于所述第一缝隙的两端,且分别通过相应的切换电路接地。所述天线结构可通过不同的切换方式涵盖低频、中频、高频等多个频段,具宽频效果。本发明还提供一种具有该天线结构的电子设备。(The invention provides an antenna structure of electronic equipment, which comprises a frame body, a first feed-in point, a first switching point and a second switching point, wherein at least part of the frame body is made of a metal material, a first gap and a second gap are formed in the frame body, the frame body between the first gap and the second gap forms a first radiation part, the first feed-in point is electrically connected to the first feed-in point to feed in a current signal for the first radiation part, and the first switching point and the second switching point are respectively arranged on the frame body, are adjacent to two ends of the first gap and are respectively grounded through corresponding switching circuits. The antenna structure can cover a plurality of frequency bands such as low frequency, intermediate frequency, high frequency and the like through different switching modes, and has a broadband effect. The invention also provides electronic equipment with the antenna structure.)

1. An antenna structure of an electronic device is characterized in that the antenna structure comprises a frame body, a first feed point, a first switching point and a second switching point, at least part of the frame body is made of a metal material, a first gap and a second gap are formed in the frame body, the frame body between the first gap and the second gap forms a first radiation portion, the first feed point is arranged on the first radiation portion and electrically connected to the first feed point to feed current signals into the first radiation portion, and the first switching point and the second switching point are respectively arranged on the frame body and adjacent to two ends of the first gap and are respectively grounded through corresponding switching circuits.

2. The antenna structure of claim 1, characterized in that: the frame body is also provided with a third gap which is closer to the first gap than the second gap, the frame body between the first gap and the third gap forms a second radiation part, the antenna structure also comprises a second feed-in point, the second feeding point is disposed on the second radiation portion and electrically connected to a second feeding point, feeding a current signal to the second radiating part, the electrical length of the first radiating part being greater than the electrical length of the second radiating part, the electrical length of the frame body between the first feed-in point and the first gap is larger than the electrical length of the frame body between the first feed-in point and the second gap, the electrical length of the frame body between the second feed-in point and the first gap is greater than the electrical length of the frame body between the second feed-in point and the third gap.

3. The antenna structure of claim 2, characterized in that: the second switching point is arranged on the second radiation part and is positioned at the other end part of the frame body close to the first gap, the second switching point is grounded through a second switching circuit, and the circuit structure of the second switching circuit is the same as that of the first switching circuit.

4. The antenna structure of claim 2, characterized in that: the electronic equipment further comprises a system ground plane, wherein a first slit and a second slit are respectively formed in two sides of the system ground plane, and the first slit and the second slit are arranged in parallel and respectively penetrate through the second slit and the third slit.

5. The antenna structure of claim 4, characterized in that: the antenna structure further comprises a first grounding point and a second grounding point, wherein the first grounding point is arranged on the part of the frame body corresponding to the first slit, spans across the first slit and is grounded, and the second grounding point is arranged on the part of the frame body corresponding to the second slit, spans across the second slit and is grounded.

6. The antenna structure of claim 1, characterized in that: the frame body is a metal frame of the electronic equipment, or

The frame body is arranged in the shell of the electronic equipment and is integrated with the shell in an in-mold injection molding mode.

7. The antenna structure of claim 2, characterized in that: when current is fed from the first feed-in point, the first radiation part excites LTE-A low, medium and high frequency modes, and when current is fed from the second feed-in point, the second radiation part excites LTE-A medium frequency mode, super medium frequency mode and LTE-A high frequency mode.

8. The antenna structure of claim 5, characterized in that: when current is fed from the first feed point, the current is coupled to the first slit through the second slit, and the first slit generates coupling resonance to adjust the frequency of the first radiation part; when current is fed from the second feeding point, the current is coupled to the second slit through the third slit, and the second slit generates coupling resonance to adjust the frequency of the second radiation part.

9. An electronic device, characterized in that: the electronic device comprising an antenna structure according to any of claims 1-8.

10. The electronic device of claim 9, wherein: the electronic equipment further comprises a back plate, the frame body is arranged on the edge of the back plate, a slot is further formed in the edge, close to the frame body, of the back plate, and the first gap and the second gap are communicated with the slot.

Technical Field

The invention relates to an antenna structure and an electronic device with the same.

Background

With the progress of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are gradually developing towards the trend of function diversification, light weight, and faster and more efficient data transmission. However, the space for accommodating the antenna is smaller and smaller, and the bandwidth requirement of the antenna is increasing with the development of wireless communication technology. Therefore, how to design an antenna with a wider bandwidth in a limited space is an important issue for antenna design.

Disclosure of Invention

In view of the above, it is desirable to provide an antenna structure and an electronic device having the same to solve the above problems.

An antenna structure of an electronic device comprises a frame body, a first feed point, a first switching point and a second switching point, wherein at least part of the frame body is made of a metal material, a first gap and a second gap are formed in the frame body, a first radiation part is formed in the frame body between the first gap and the second gap, the first feed point is arranged on the first radiation part and is electrically connected to the first feed point so as to feed a current signal into the first radiation part, and the first switching point and the second switching point are respectively arranged at the two ends of the frame body, adjacent to the first gap, and are respectively grounded through corresponding switching circuits.

An electronic device comprises the antenna structure.

The antenna structure and the electronic device with the antenna structure are provided with the corresponding first switching point and the second switching point at two ends of the first gap. Therefore, a plurality of frequency bands such as low frequency, intermediate frequency, high frequency and the like can be covered by different switching modes, Carrier Aggregation (CA) of LTE-A is met, and the radiation of the antenna structure has a wider frequency effect compared with a common metal back cover antenna. Moreover, the antenna structure can effectively control the mutual coupling state between the two radiation parts by arranging the first switching point and the second switching point, thereby effectively improving the isolation of the two radiation parts and improving the efficiency of each radiation part.

Drawings

Fig. 1 is a schematic diagram illustrating an application of an antenna structure to an electronic device according to a preferred embodiment of the invention.

Fig. 2 is a schematic view of the electronic device shown in fig. 1 at another angle.

Fig. 3 is a circuit diagram of the antenna structure shown in fig. 1.

Fig. 4 is a schematic diagram of a current flow direction of the antenna structure shown in fig. 3 during operation.

Fig. 5 is a circuit diagram of a first switching circuit in the antenna structure shown in fig. 3.

Fig. 6 is a graph of S-parameters (scattering parameters) when the antenna structure shown in fig. 3 operates in the LTE B8 frequency band when the first slot is opened and the first slot is not opened.

Fig. 7 is a graph of the total radiation efficiency of the antenna structure shown in fig. 3 when operating in the LTE B8 frequency band when the first slot is opened and when the first slot is not opened.

Fig. 8 is a graph showing S-parameters (scattering parameters) of the second radiation portion of the antenna structure shown in fig. 3 when the second slit is opened and when the second slit is not opened.

Fig. 9 is a graph of the total radiation efficiency of the second radiation portion of the antenna structure shown in fig. 3 when the second slit is opened and the second slit is not opened.

Fig. 10 is a graph of the S-parameter (scattering parameter) of the antenna structure shown in fig. 3.

Fig. 11 is a graph of the total radiation efficiency of the antenna structure shown in fig. 3.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "electrically connected" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "electrically connected" to another element, it can be connected by contact, e.g., by wires, or by contactless connection, e.g., by contactless coupling.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and 2, an antenna structure 100 (see fig. 3) according to a preferred embodiment of the present invention is applicable to an electronic device 200, such as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), etc., for transmitting and receiving radio waves to transmit and exchange wireless signals.

It is to be appreciated that the electronic device 200 may employ one or more of the following communication techniques: bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, wireless fidelity (Wi-Fi) communication technology, global system for mobile communications (GSM) communication technology, Wideband Code Division Multiple Access (WCDMA) communication technology, Long Term Evolution (LTE) communication technology, 5G communication technology, SUB-6G communication technology, future other communication technologies, and the like.

Referring to fig. 3, the electronic device 200 includes a housing 11 and a display unit 201. The housing 11 at least includes a frame 111, a back plate 112, a system ground plane 113 and a middle frame 114.

The frame 111 is a substantially ring-shaped structure, and is made of metal or other conductive material. The back plate 112 is disposed at an edge of the frame 111. The backplate 112 may be made of metal or other conductive material. Of course, the back plate 112 may also be made of an insulating material, such as glass, plastic, ceramic, etc.

It is understood that, in the present embodiment, an opening (not shown) is disposed on a side of the frame 111 opposite to the back plate 112 for accommodating the display unit 201. It is understood that the display unit 201 has a display plane exposed at the opening. It is understood that the display unit 201 may be combined with a touch sensor to form a touch screen. The touch sensor may also be referred to as a touch panel or a touch sensitive panel.

The system ground plane 113 may be made of metal or other conductive material to provide ground for the antenna structure 100.

The middle frame 114 is a generally rectangular sheet made of metal or other conductive material. The shape and size of the middle frame 114 is slightly smaller than the system ground plane 113. The middle frame 114 is stacked on the system ground plane 113. It is understood that, in the present embodiment, the middle frame 114 is a metal sheet for supporting the display unit 201, providing electromagnetic shielding, and improving the mechanical strength of the electronic device 200.

Referring to fig. 3 again, the antenna structure 100 at least includes a frame, a first feeding point 12, a second feeding point 13, a first switching point 15, and a second switching point 17.

The frame body is at least partially made of a metal material. In this embodiment, the frame is a frame 111 of the electronic device 200. The bezel 111 includes at least a first portion 115, a second portion 116, and a third portion 117. In this embodiment, the first portion 115 is a bottom end of the electronic device 200, that is, the first portion 115 is a bottom metal frame of the electronic device 200, and the antenna structure 100 constitutes a lower antenna of the electronic device 200. The second portion 116 is disposed opposite to the third portion 117, and both are disposed at both ends of the first portion 115, preferably vertically. In this embodiment, the length of the second portion 116 or the third portion 117 is greater than the length of the first portion 115. That is, the second portion 116 and the third portion 117 are both side metal frames of the electronic device 200.

At least one slit is further formed on the frame 111. In this embodiment, the frame 111 has three slits, i.e., a first slit 120, a second slit 121, and a third slit 122. Wherein the first slit 120 opens onto the first portion 115. The second slit 121 is disposed on the second portion 116. The third slit 122 is disposed on the third portion 117. The third slit 122 is closer to the first slit 120 than the second slit 121.

In this embodiment, the first slit 120, the second slit 121, and the third slit 122 all penetrate and block the frame 111. The at least one slit jointly divides at least two radiation portions from the frame 111. In the present embodiment, the first slit 120, the second slit 121, and the third slit 122 jointly define a first radiation portion F1 and a second radiation portion F2 from the frame 111. In the present embodiment, the frame 111 between the first slit 120 and the second slit 121 forms the first radiation portion F1. The bezel 111 between the third slit 122 and the first slit 120 forms the second radiation part F2. That is, the first radiation portion F1 is disposed at the lower right corner of the electronic device 200, i.e., is composed of a portion of the first portion 115 and a portion of the second portion 116. The second radiation portion F2 is disposed at the lower left corner of the electronic device 200, i.e., is composed of a portion of the first portion 115 and a portion of the third portion 117. The electrical length of the first radiation part F1 is greater than that of the second radiation part F2.

It can be understood that, in the present embodiment, when the widths of the second slot 121 and the third slot 122 are less than 2 millimeters (mm), the efficiency of the antenna structure 100 may be affected. Therefore, the widths of the second gap 121 and the third gap 122 are generally not less than 2 mm. While a larger width of the first slot 120 is more effective for the antenna structure 100. Therefore, in the present embodiment, the widths of the second slot 121 and the third slot 122 may be set to be 2mm in consideration of the overall appearance of the electronic device 200 and the radiation efficiency of the antenna structure 100. The width of the first slit 120 may be set to 7.25 mm.

It is understood that, in the present embodiment, the first feeding point 12 is disposed on the first radiation portion F1 and is located at the second portion 116. The first feeding point 12 can be electrically connected to a first feeding point 202 by means of a spring, a microstrip line, a strip line, a coaxial cable, etc. to feed a current signal to the first radiating portion F1.

The second feeding point 13 is disposed on the second radiating portion F2 and is located at the third portion 117. The second feeding point 13 can be electrically connected to a second feeding point 203 through a spring, a microstrip line, a strip line, a coaxial cable, etc. to feed a current signal to the second radiating portion F2.

The first switching point 15 is provided on the first radiation portion F1 and is located at the first portion 115. The second switching point 17 is provided on the second radiation portion F2 and is located at the first portion 115. In the present embodiment, the first switching point 15 is disposed at the end of the first radiating portion F1 close to the first slot 120, and is grounded through a first switching circuit 150. The second switch 17 is disposed at the end of the second radiating portion F2 close to the first slot 120, and is grounded through a second switch circuit 170. That is, in the present embodiment, the first switching point 15 and the second switching point 17 are disposed at an interval in the first portion 115, are located at two ends of the first gap 120, and are grounded through corresponding switching circuits, respectively.

It is understood that fig. 4 is a circuit diagram of the antenna structure 100. When a current is fed from the first feeding point 12, the current flows through the first radiating portion F1 and flows to the first slot 120 (see path P1), so as to excite a first working mode to generate a radiation signal of a first radiation frequency band. When a current is fed from the first feeding point 12, the current also flows through the portion of the first radiating portion F1 located in the second portion 116 and flows to the second slot 121 (see path P2), so as to excite a second working mode to generate a radiation signal of a second radiation frequency band.

When a current is fed from the second feeding point 13, the current flows through the portion of the second radiation portion F2 located in the first portion 115 and flows to the first gap 120 (see path P3), so as to excite a third working mode to generate a radiation signal of a third radiation frequency band. When a current is fed from the second feeding point 13, the current also flows through the portion of the second radiating portion F2 located in the third portion 117 and flows to the third slot 122 (see path P4), so as to excite a fourth mode of operation to generate a radiation signal in a fourth radiation band.

In this embodiment, the first working mode is a low-frequency mode of Long Term Evolution Advanced (LTE-a), and the second working mode includes a medium-frequency mode and a high-frequency mode of LTE-a. The third working mode includes an LTE-a intermediate frequency (if) mode and an ultra-intermediate frequency (UMB) mode. The fourth working mode comprises LTE-A medium and high frequency modes.

Referring to fig. 5, in the present embodiment, the first switching circuit 150 includes a first switching unit 151 and at least one first switching element 153. The first switching unit 151 may be a single-pole single-throw switch, a single-pole double-throw switch, a single-pole triple-throw switch, a single-pole four-throw switch, a single-pole six-throw switch, a single-pole eight-throw switch, or the like. The first switching unit 151 is electrically connected to the first switching point 15 to be electrically connected to the first radiation part F1. The first switching element 153 may be an inductor, a capacitor, or a combination of an inductor and a capacitor. The first switching elements 153 are connected in parallel, and one end thereof is electrically connected to the first switching unit 151, and the other end thereof is grounded. Thus, by controlling the switching of the first switching unit 151, the first radiating portion F1 can be switched to different first switching elements 153 to adjust the frequency of the first radiating band, i.e. the frequency of the low frequency band, so that the low frequency band covers 600-.

It is understood that in the present embodiment, the circuit structure and the operation principle of the second switching circuit 170 are similar to those of the first switching circuit 150, and the difference is only that the second switching circuit 170 is used to adjust the frequency of the third radiation band to control the if frequency offset of the third radiation band, so as to cover the UMB band (1427 and 1510MHz, applied to japan), which is not repeated herein.

It can be understood that, referring to fig. 2 again, in the present embodiment, the back plate 112 is further provided with a slot 123 near the edge of the frame 111. The slot 123 is substantially U-shaped, opens at a side of the back plate 112 close to the first portion 115, extends towards the second portion 116 and the third portion 117, and is communicated with the first slit 120, the second slit 121, and the third slit 122.

It is understood that, in the present embodiment, the first gap 120, the second gap 121, the third gap 122 and the slot 123 are all filled with an insulating material, such as, but not limited to, plastic, rubber, glass, wood, ceramic, etc.

It can be understood that, referring to fig. 3 again, in the present embodiment, the system ground plane 113 is provided with a first slit 124 and a second slit 125 along a direction parallel to the second portion 116 and close to the first portion 115 respectively adjacent to two ends of the middle frame 114. The first slit 124 and the second slit 125 are disposed in parallel, and are respectively communicated with the second slit 121 and the third slit 122.

It is understood that, in the present embodiment, the antenna structure 100 further includes a first grounding point 18 and a second grounding point 19. The first ground point 18 is disposed on the second portion 116 of the frame 111 corresponding to the first slit 124, and has one end crossing the first slit 124 and grounded. The second grounding point 19 is disposed on the third portion 117 of the frame 111 corresponding to the second slit 125, and has one end crossing the second slit 125 and grounded.

It is understood that, referring to fig. 4 again, when a current is fed from the first feeding point 12, flows through the portion of the first radiating portion F1 located at the second portion 116, and flows to the second slot 121, the current is also coupled to the first slit 124 through the second slot 121. Thus, the first slit 124 can be used to couple and resonate a mode with adjustability and better antenna efficiency, so that the medium-high frequency of the first radiation portion F1 can cover 1710-. Meanwhile, when a current is fed from the second feeding point 13 to flow through a portion of the second radiating portion F2 located at the third portion 117 and to the third slit 122, the current is also coupled to the second slit 125 through the third slit 122. Thus, the second slit 125 can be used to couple and resonate a mode with adjustability and better antenna efficiency, so that the frequency of the second radiation portion F2 can cover 1427-2690 MHz.

It should be understood that fig. 6 is a graph illustrating S-parameters (scattering parameters) when the antenna structure 100 is opened and not opened with the first slit 124, and the antenna structure 100 is operated in the LTE B8 frequency band. The curve S601 is an S11 value when the antenna structure 100 operates in the LTE B8 frequency band when the first slit 124 is not opened. The curve S602 is the S11 value when the antenna structure 100 operates in the LTE B8 frequency band when the first slot 124 is opened.

Fig. 7 is a graph of the total radiation efficiency of the antenna structure 100 operating in the LTE B8 frequency band when the antenna structure 100 is opened with the first slit 124 and not opened with the first slit 124. A curve S701 is a total radiation efficiency of the antenna structure 100 operating in the LTE B8 frequency band when the first slit 124 is opened. Curve S702 is the total radiation efficiency of the antenna structure 100 operating in the LTE B8 frequency band when the first slit 124 is not opened. The curve S703 is the total radiation efficiency of the antenna structure 100 when the first radiation portion F1 operates.

Fig. 8 is a graph of S-parameters (scattering parameters) of the second radiation portion F2 in the antenna structure 100 when the antenna structure 100 is opened with the second slit 125 and not opened with the second slit 125. A curve S801 is a value S11 when the second slit 125 is opened, and the second radiation portion F2 operates in a super intermediate frequency (UMB) band. A curve S802 is a S11 value when the second radiation portion F2 operates in a super intermediate frequency (UMB) band when the second slit 125 is not opened. The curve S803 is S11 when the second slit 125 is opened, and the second radiation portion F2 operates in the middle and high frequency bands. The curve S804 is the S11 value when the second radiation portion F2 operates in the middle and high frequency bands when the second slit 125 is not opened.

Fig. 9 is a graph of the total radiation efficiency of the second radiation portion F2 in the antenna structure 100 when the antenna structure 100 is opened with the second slit 125 and not opened with the second slit 125. The curve S901 is a total radiation efficiency of the second radiation portion F2 when the second slit 125 is opened and the second radiation portion F2 operates in a super intermediate frequency (UMB) band. A curve S902 is a total radiation efficiency of the second radiation portion F2 when the second slit 125 is not opened, when the second radiation portion F2 operates in a super intermediate frequency (UMB) band. A curve S903 is a total radiation efficiency of the second radiation portion F2 when the second slit 125 is opened, and the second radiation portion F2 operates in the middle and high frequency bands. A curve S904 shows the total radiation efficiency of the second radiation portion F2 when the second slit 125 is not opened, and the second radiation portion F2 operates in the middle and high frequency bands. The curve S905 is the total radiation efficiency of the antenna structure 100 when the second radiation portion F2 operates.

Fig. 10 is a graph of the S-parameter (scattering parameter) of the antenna structure 100. The curve S101 is the S11 value of the antenna structure 100 operating in the LTE B71 frequency band. Curve S102 is the S11 value for the antenna structure 100 operating in the LTE B17 frequency band. Curve S103 is the S11 value of the antenna structure 100 operating in the LTE B13 frequency band. Curve S104 is the S11 value for the antenna structure 100 operating in the LTE B20 frequency band. The curve S105 is the S11 value of the antenna structure 100 operating in the LTE B5 frequency band. Curve S106 is the S11 value for the antenna structure 100 operating in the LTE B8 frequency band. Curve S107 is the S11 value for the antenna structure 100 operating in the ultra-intermediate frequency (UMB) band. The curve S108 is the S11 value when the antenna structure 100 operates in the middle and high frequency bands. Curve S109 is the S11 value for the antenna structure 100.

Fig. 11 is a graph of the overall radiation efficiency of the antenna structure 100. The curve S111 represents the total radiation efficiency of the antenna structure 100 operating in the LTE B71 frequency band. Curve S112 is the total radiation efficiency of the antenna structure 100 operating in the LTE B17 frequency band. Curve S113 is the total radiation efficiency of the antenna structure 100 operating in the LTE B13 frequency band. Curve S114 is the total radiation efficiency of the antenna structure 100 operating in the LTE B20 frequency band. Curve S115 is the total radiation efficiency of the antenna structure 100 operating in the LTE B5 frequency band. Curve S116 shows the total radiation efficiency of the antenna structure 100 operating in the LTE B8 frequency band. Curve S117 represents the total radiation efficiency of the antenna structure 100 operating in the ultra-medium frequency (UMB) band. Curve S118 is the total radiation efficiency of the antenna structure 100 operating in the middle and high frequency bands. Curve S119 is the total radiation efficiency of the first radiation portion F1 in the antenna structure 100. The curve S120 is the total radiation efficiency of the second radiation portion F2 in the antenna structure 100.

As can be seen from fig. 6 to 11, the antenna structure 100 is provided with the first switching circuit 150 to switch the low frequency modes of the antenna structure 100, so as to effectively improve the low frequency bandwidth and achieve better antenna efficiency, and the low frequency of the antenna structure 100 covers the B71/B17/B13/B20/B5/B8 frequency band. Furthermore, by providing the dual slits, i.e. the first slit 124 and the second slit 125, energy can be coupled to resonate an additional mode, thereby effectively increasing the bandwidth of medium-high frequency. Specifically, by combining the middle-high frequency radiator (i.e., the radiator between the first feed point 12 and the second slot 121) of the first radiation part F1 with the first slot 124, the middle-high frequency radiator (i.e., the radiator between the second feed point 13 and the third slot 122) of the second radiation part F2 is combined with the second slot 125, so that energy can be effectively coupled to resonate an additional mode, thereby effectively increasing the bandwidth of middle and high frequencies, and further covering a globally common 4G communication band, such as 1710-2690MHz band. Furthermore, compared with the structure without the first slit 124 and the second slit 125 in the prior art, the antenna structure 100 of the present invention can improve the antenna efficiency of the resonant mode by 2-3dB by providing the first slit 124 and the second slit 125.

It can be understood that, in the present embodiment, the first switching circuit 150 and the second switching circuit 170 are located at two sides of the first slot 120, and can be respectively used for adjusting the resonant frequency of the corresponding radiation portion, so as to effectively improve the frequency coverage of the antenna structure 100. For example, the first switching circuit 150 is used to adjust a low frequency band of the first radiation portion F1. The second switching circuit 170 is configured to adjust a medium-high frequency band of the second radiation portion F2.

In addition, the first switching circuit 150 and the second switching circuit 170 are further used to effectively improve the isolation between the two radiation portions. In general, when two radiating portions operate in the same frequency band, there may be mutual interference between each other. In the present embodiment, by providing the first switching circuit 150 and the second switching circuit 170, when one of the radiation portions, for example, the first radiation portion F1, operates in a certain frequency band, for example, the middle-high frequency band, the other radiation portion, for example, the second radiation portion F2, can be switched by the switching circuit, for example, the second switching circuit 170, so as to effectively improve the isolation between the two radiation portions. And the antenna structure 100 in the present invention is less costly than the prior art in which the corresponding tuner is directly provided at the feed point to switch the corresponding frequency.

Furthermore, in the present embodiment, since the middle-high frequency radiator of the first radiation portion F1 is disposed on the second portion 116, and the middle-high frequency radiator of the second radiation portion F2 is disposed on the third portion 117, the two radiators are disposed at intervals, that is, a low frequency radiator is disposed between the two radiators, so that the isolation between the two radiation portions can be effectively improved.

It is understood that in the present embodiment, the antenna structure 100 may be adapted to an electronic device 200 having a full screen, a narrow bezel, a folded screen, or a dual screen.

It can be understood that, in the present embodiment, since the first slot 120 is disposed on the low frequency radiator, i.e., the first portion 115 of the first radiation portion F1, it can also effectively reduce the influence of the hand grasping on the low frequency.

It is understood that, referring to fig. 3 again, in the present embodiment, the electronic device 200 further includes a circuit board 20 and at least one electronic element. The circuit board 20 is disposed in a space surrounded by the frame 111, the back plate 112, and the middle frame 114. The circuit board 20 may be made of a dielectric material such as epoxy resin fiberglass (FR 4). The first feeding point 202, the second feeding point 203, the first switching circuit 150 and the second switching circuit 170 are disposed on the circuit board 20. In the present embodiment, the electronic device 200 includes at least four electronic components, namely a first electronic component 21, a second electronic component 22, a third electronic component 23, and a fourth electronic component 24. The first electronic component 21, the second electronic component 22, the third electronic component 23 and the fourth electronic component 24 are disposed on the circuit board 20.

In the present embodiment, the first electronic component 21 is a Universal Serial Bus (USB) interface module. The first electronic component 21 is located between the first slit 120 and the second portion 116. The second electronic component 22 is a speaker. The second electronic element 22 is disposed between the first electronic element 21 and the second portion 116. The third electronic component 23 is a microphone. The third electronic component 23 is disposed corresponding to the first slit 120. The fourth electronic component 24 is a Vibrator (Vibrator). The fourth electronic element 24 is disposed between the first gap 120 and the third portion 117.

As described above, in the present embodiment, the frame body of the antenna structure 100 is directly formed by the frame 111 of the electronic device 200, that is, the housing (frame) of the electronic device 200 is made of a metal material, and the antenna structure 100 is a metal frame antenna. Of course, in other embodiments, the antenna structure 100 is not limited to a metal bezel antenna, but may also be in other antenna forms such as a Mode Decoration Antenna (MDA). For example, when the antenna structure 100 is an MDA antenna, it can utilize a metal part in the chassis of the electronic device 200 as a frame to implement a radiation function. The housing of the electronic device 200 is made of insulating materials such as plastic, glass or ceramic, and the metal part is integrated with the housing by injection molding.

In summary, the antenna structure 100 of the present invention is configured with at least one slot (e.g., the first slot 120, the second slot 121, and the third slot 122) on the frame 111 to divide at least two radiation portions from the frame 111. The antenna structure 100 further includes a first switching point 15 and a second switching point 17 disposed at two ends of the first slot 120. Therefore, a plurality of frequency bands such as low frequency, intermediate frequency, high frequency and the like can be covered by different switching modes, Carrier Aggregation (CA) of LTE-a is satisfied, and the radiation of the antenna structure 100 has a wider frequency effect compared with a general metal back cover antenna. Specifically, the antenna structure 100 can cover 600-. Furthermore, the antenna structure 100 can effectively control the mutual coupling state between the two radiation portions by providing the first switch point 15 and the second switch point 17, so as to effectively improve the isolation between the two radiation portions and the efficiency of each radiation portion. Meanwhile, by providing the first slit 124 and the second slit 125, independent modes with adjustability and good antenna efficiency can be generated through coupling. The antenna structure 100 of the present invention can increase the if bandwidth and has the best antenna efficiency, and has MIMO characteristics, and can also cover the applied frequency band of the global frequency band.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention. Those skilled in the art can also make other changes and the like in the design of the present invention within the spirit of the present invention as long as they do not depart from the technical effects of the present invention. Such variations are intended to be included within the scope of the invention as claimed.