Electronic device

Abstract

The application provides an electronic device, a first radiator of the electronic device includes a first free end, a first feeding point and a first grounding end, the first grounding end is electrically connected with a ground plane to realize grounding; a second radiator includes a second free end, an electrical connection point and a second grounding end, the second free end is arranged in a spaced manner with the first free end, the second grounding end extends in a direction away from the first radiator and is electrically connected with the ground plane to realize grounding; a first feed source is electrically connected with the first feeding point and the electrical connection point respectively, the first feed source is used for exciting the first radiator and the second radiator to support the transceiving of a first wireless signal of a first frequency band; a bearing plate is used for bearing the first feed source, the bearing plate is arranged in the electronic device, and the minimum distance between the bearing plate and the frame is greater than the maximum distance between the first radiator, the second radiator and the frame. Based on this, the SAR value of the electronic device when supporting the first frequency band is relatively low.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to an electronic device. Background Technology

[0002] With the development of communication technology, electronic devices such as smartphones are capable of more and more functions, and their communication modes are becoming more diversified. Each communication mode requires a corresponding antenna to support it. Generally, in the antenna design process, the Specific Absorption Rate (SAR) is used to evaluate the impact of electromagnetic radiation generated by electronic devices on the human body. The higher the SAR value, the greater the impact on the human body.

[0003] Electronic devices in related technologies often incorporate a backoff mechanism. When an excessively high SAR value is detected, the antenna's transmit power is reduced to lower the SAR value. However, this backoff operation severely impacts the antenna's radiation performance. Therefore, there is an urgent need to provide an antenna design scheme with both a lower SAR value and superior radiation performance. Summary of the Invention

[0004] This application provides an electronic device that has a low SAR value and superior radiation performance when transmitting wireless signals.

[0005] This application provides an electronic device, including a frame; the electronic device further includes:

[0006] The first radiator includes a first free end, a first feed point, and a first grounding end, wherein the first grounding end is electrically connected to the grounding plane to achieve grounding.

[0007] The second radiator includes a second free end, an electrical connection point, and a second grounding end. The second free end is spaced apart from the first free end, and the second grounding end extends in a direction away from the first radiator and is electrically connected to the grounding plane to achieve grounding.

[0008] A first feed source, electrically connected to both the first feed point and the electrical connection point, is used to excite the first radiator and the second radiator to jointly support the transmission and reception of a first wireless signal in the first frequency band; and

[0009] A support plate is used to support the first feed source. The support plate is disposed inside the electronic device, and the minimum distance between the support plate and the frame is greater than the maximum distance between the first radiator, the second radiator and the frame.

[0010] In the electronic device of this application, when the first feed source is disposed on the carrier plate, it is farther from the frame than the first radiator and the second radiator. The excitation signal provided by the first feed source can be coupled to the first radiator through a first path between the first feed source and the first feed point, or it can be coupled to the second radiator through a second path between the first feed source and the electrical connection point. At this time, some resonant current can be formed on the second path, which can divert some of the resonant current. Furthermore, since the carrier plate and the first feed source are far from the frame, the second path is farther from the user when the user uses the electronic device, thereby dispersing some of the resonant current. The second path, being farther from the user, can reduce the SAR value of the electronic device. At the same time, the second radiator contains both the resonant current generated by the excitation signal provided by the first feed source and the resonant current generated by electromagnetic coupling with the first radiator. Compared to the excitation current that only has electromagnetic coupling, the resonant current distribution on the second radiator of this application is more balanced, and the contribution rate of the second radiator to the SAR value of the electronic device is lower. Therefore, under the combined action of the first feed source, the first radiator, and the second radiator, the electronic device of this application can have a lower SAR value. Compared with the scheme in the related technology where the first feed source is only electrically connected to the first radiator, the SAR value of the electronic device of this application can be reduced by 25%, and the SAR reduction effect is obvious. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0013] Figure 2 This is a schematic diagram of the first current distribution of an electronic device provided in an embodiment of this application.

[0014] Figure 3 This is a schematic diagram of a second current distribution for an electronic device provided in an embodiment of this application.

[0015] Figure 4 for Figure 1 The S-parameter curve of the electronic device is shown.

[0016] Figure 5 for Figure 1 The diagram shows the antenna efficiency curve of the electronic device.

[0017] Figure 6 for Figure 1The SAR value hotspot distribution map of the electronic device is shown.

[0018] Figure 7 for Figure 1 The diagram shows a structure in which the first feed source of the electronic device is not electrically connected to the electrical connection point.

[0019] Figure 8 for Figure 7 The diagram shows a current distribution of an electronic device.

[0020] Figure 9 for Figure 7 This is a schematic diagram of another current distribution in the electronic device shown.

[0021] Figure 10 for Figure 7 The S-parameter curve of the electronic device is shown.

[0022] Figure 11 for Figure 7 The diagram shows the antenna efficiency curve of the electronic device.

[0023] Figure 12 for Figure 7 The SAR value hotspot distribution map of the electronic device is shown.

[0024] Figure 13 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application.

[0025] Figure 14 This is a schematic diagram of a third structure of an electronic device provided in an embodiment of this application.

[0026] Figure 15 This is a schematic diagram of a fourth structure of an electronic device provided in an embodiment of this application.

[0027] Figure 16 This is a fifth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0028] Figure 17 This is a sixth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0029] Figure 18 for Figure 17 The diagram shows the first type of current distribution for the electronic device.

[0030] Figure 19 for Figure 17 The diagram shows a second type of current distribution for the electronic device.

[0031] Figure 20 for Figure 17 The diagram shows an electrical connection of an electronic device.

[0032] Figure 21 This is a seventh structural schematic diagram of an electronic device provided in an embodiment of this application.

[0033] Figure 22 This is an eighth structural schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0034] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 22 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] This application provides an electronic device 10, which can be a smartphone, tablet computer, or other device, as well as a gaming device, augmented reality (AR) device, automotive device, data storage device, audio playback device, video playback device, laptop computer, desktop computing device, etc. Please refer to... Figure 1 , Figure 1 This is a schematic diagram of a first structure of an electronic device 10 provided in an embodiment of this application. The electronic device 10 includes a first radiator 110, a second radiator 120, a first feed source 130, and a carrier plate 300.

[0036] The first radiator 110 includes a first free end 111, a first ground end 112, and a first feed point 113. The first ground end 112 is electrically connected to the ground plane 140 to achieve grounding. The second radiator 120 is disposed on the side of the first free end 111 of the first radiator 110 away from the first ground end 112. The second radiator 120 includes a second free end 121, a second ground end 122, and an electrical connection point 123. The second free end 121 may be spaced apart from the first free end 111, and the second ground end 122 may extend in a direction away from the second free end 121, so that the second radiator 120 and the first radiator 110 can form a common aperture antenna. The first feed source 130 is disposed on the carrier plate 300, which carries the first feed source 130. The carrier plate 300 is disposed inside the electronic device 10. The minimum distance between the carrier plate 300 and the frame (e.g., the first frame 511 mentioned later) is greater than the largest of the distances between the first radiator 110 and the second radiator 120 and the frame, so that the carrier plate 300 and the first feed source 130 are further away from the frame than the first radiator 110 and the second radiator 120. The first feed source 130 is electrically connected to the first feed point 113 and the electrical connection point 123, respectively. The first feed source 130 is used to excite the first radiator 110 and the second radiator 120 to jointly support the transmission and reception of the first wireless signal in the first frequency band.

[0037] Understandably, the first power supply point 113 can be located between the first free end 111 and the first ground end 112, or it can be located at the first free end 111. The electrical connection point 123 can be located between the second free end 121 and the second ground end 122, or it can be located at the second free end 121.

[0038] It is understood that the first feed source 130 may, but is not limited to, be electrically connected to the first feed point 113 through structures such as microstrip lines, PCB traces, and metal springs to form a first path S1, and the first feed source 130 may, but is not limited to, be electrically connected to the electrical connection point 123 through structures such as microstrip lines, PCB traces, and metal springs to form a second path S2.

[0039] It is understood that the first radiator 110 and the second radiator 120 may be, but are not limited to, straight, bent, or other shapes. The first radiator 110 and the second radiator 120 are conductive structures capable of supporting the transmission and reception of a first wireless signal. For example, the first wireless signal supported by the first radiator 110 may include, but is not limited to, transmitting Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, 3rd Generation (3G), 4th Generation (4G), 5th Generation (5G), Near Field Communication (NFC) signals, Bluetooth (BT) signals, Ultra Wideband (UWB) signals, etc. Depending on the placement of the first radiator 110 and the second radiator 120, the carrier board 300 may be the motherboard or a small board of the electronic device 10.

[0040] It is understood that the ground plane 140 can form a common ground. The ground plane 140 can be a plane or structure with zero potential. The ground plane 140 can be a component of the electronic device 10 or other devices. For example, the ground plane 140 can be formed through conductors, printed circuits, or metal printed layers in the electronic device 10; the ground plane 140 can be formed on the motherboard, small board, or other carrier of the electronic device 10; or, the ground plane 140 can also be formed on the frame of the electronic device 10. This application embodiment does not limit the specific location of the ground plane 140.

[0041] In the electronic device 10 of this application embodiment, when the first feed source 130 is disposed on the carrier plate 300, the first feed source 130 is further away from the frame than the first radiator 110 and the second radiator 120. The excitation signal provided by the first feed source 130 can be coupled to the first radiator 110 through the first path S1 between the first feed source 130 and the first feed point 113, or it can be coupled to the second radiator 120 through the second path S2 between the first feed source 130 and the electrical connection point 123. At this time, some of the resonant current can be formed on the second path S2, so the second path S2 can divert some of the resonant current. Furthermore, since the carrier plate 300 and the first feed source 130 are far from the frame, when the user uses the electronic device 10, the second path S2 is further away from the user. Thus, the second path S2, which disperses some of the resonant current and is farther away from the user, can reduce the SAR value of the electronic device 10. At the same time, the second radiator 120 has both the resonant current generated by the excitation signal provided by the first feed source 130 and the resonant current generated by electromagnetic coupling with the first radiator 110. Compared with the excitation current that only has electromagnetic coupling, the resonant current distribution on the second radiator 120 of this application is more balanced, and the contribution rate of the second radiator 120 to the SAR value of the electronic device 10 is lower. Therefore, under the combined action of the first feed 130, the first radiator 110, and the second radiator 120, the electronic device 10 of this application can have a lower SAR value. Compared with the scheme in the related art where the first feed 130 is only electrically connected to the first radiator 110, the SAR value of the electronic device 10 of this application can be reduced by 25%, and the SAR reduction effect is obvious.

[0042] The first feed source 130 can excite the first radiator 110 and the second radiator 120 to form a first resonant mode and a second resonant mode to jointly support the transmission and reception of the first wireless signal in the first frequency band.

[0043] For example, please refer to Figure 2 , Figure 2 This is a schematic diagram of a first current distribution for an electronic device 10 provided in an embodiment of this application. A first resonant mode can form a first resonant current I1 flowing from the second free end 121 towards the second ground end 122 on the second radiator 120. It is understood that the first resonant current I1 can also be distributed on the first radiator 110, but the density of the first resonant current I1 on the first radiator 110 is less than the density of the first resonant current I1 on the second radiator 120, and the first resonant mode is mainly formed by the second radiator 120.

[0044] For another example, please refer to Figure 3 , Figure 3This is a schematic diagram of a second current distribution for the electronic device 10 provided in an embodiment of this application. A second resonant current I2 is formed on the first radiator 110, flowing from the first free end 111 towards the first ground end 112. It is understood that the second resonant current I2 can also be distributed on the second radiator 120, but the density of the second resonant current I2 on the second radiator 120 is less than the density of the second resonant current I2 on the first radiator 110, and the second resonant mode is mainly formed by the first radiator 110. It is understood that the flow direction of the second resonant current I2 formed on the first radiator 110 is opposite to the flow direction of the first resonant current I1 formed on the second radiator 120, thereby making the distribution of the resonant current generated by the excitation of the first feed source 130 more dispersed in the first radiator 110 and the second radiator 120.

[0045] It is understandable that, such as Figure 2 and Figure 3 As shown, the first resonant current I1 and the second resonant current I2 are strongly distributed on the second path S2 between the first feed source 130 and the electrical connection point 123 and the first path S1 between the first feed source 130 and the first feed point 113. Thus, the first path S1 and the second path S2 can play the role of dispersing the current. The resonant currents on the first path S1 and the second path S2 are far away from the human body, thereby reducing the SAR value of the electronic device 10.

[0046] Understandably, please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 The S-parameter curve of the electronic device 10 shown is shown. Figure 5 for Figure 1 The antenna efficiency curve of the electronic device 10 shown. Figure 4 Curve L1 represents the S-parameter region of electronic device 10 in the first and second resonant modes, where region A in curve L1 corresponds to the first resonant mode and region B corresponds to the second resonant mode. Figure 5 Curve L2 represents the radiation efficiency curve of electronic device 10 in the first and second resonant modes, and curve L3 represents the system efficiency curve of electronic device 10 in the first and second resonant modes. From curves L1 to L3, it can be seen that the electronic device 10 of this application exhibits superior antenna performance under the first and second resonant modes.

[0047] Understandably, please refer to Figure 6 , Figure 6 for Figure 1 The SAR value hotspot distribution map of the electronic device 10 shown is composed of... Figure 6 It can be seen that, Figure 1The main hotspots of the SAR value of the illustrated electronic device 10 are distributed in the second radiator 120. However, because the resonant current distribution on the second radiator 120 is relatively uniform and weak, the contribution of the second radiator 120 to the SAR value hotspots is low. Furthermore, the first path S1 and the second path S2 disperse part of the resonant current, resulting in a low SAR value for the electronic device 10. For example, the SAR value of the electronic device 10 of this application can be 1.63 W / kg.

[0048] It should be noted that the electronic device 10 in this application embodiment may also support the first wireless signal of the first frequency band in other resonance modes, and this application embodiment does not limit this.

[0049] Wherein, when the first feed source 230 is electrically connected to the first feed point but not electrically connected to the electrical connection point, such as Figure 7 As shown, Figure 7 for Figure 1 The diagram shows a structure of the electronic device 20 where the first feed 230 is not electrically connected to the electrical connection point. In this case, the second radiator 220, as a parasitic branch of the first radiator 210, can be electromagnetically coupled to the first radiator 210. Under the action of the first feed 230, the first radiator 210 and the second radiator 220 can also generate two resonant modes. For example... Figure 8 As shown, Figure 8 for Figure 7 The diagram shows a current distribution of the electronic device 20. A first feed source 230 can excite a first radiator 210 and a second radiator 220 to generate a third resonant mode. This third resonant mode forms a third resonant current I3 on ​​the first radiator 210 flowing from the first ground terminal towards the first free terminal, and on the second radiator 220 flowing from the first free terminal towards the first ground terminal. The directions of the third resonant current I3 on ​​the first radiator 210 and the second radiator 220 are the same. Figure 9 As shown, Figure 9 for Figure 7 Another current distribution diagram of the electronic device 20 shown shows that the first feed source 230 can also mainly excite the second radiator 220 to generate a fourth resonant mode. The fourth resonant mode forms a fourth resonant current I4 flowing from the second free end to the second ground end on the second radiator 220. This fourth resonant mode serves as an auxiliary mode to the third resonant mode.

[0050] It is understandable that, such as Figure 10 and Figure 11 As shown, Figure 10 for Figure 7 The S-parameter curve of the electronic device 20 shown is shown. Figure 11 for Figure 7 The antenna efficiency curve of the electronic device 20 shown is shown in the figure. Figure 10 The middle curve L4 is Figure 7The S-parameter curve of the electronic device 20 shown is as follows: Figure 11 The middle curves L5 and L6 are respectively Figure 7 The radiation efficiency curve and system efficiency curve of the electronic device 20 are shown. Figure 12 As shown, Figure 12 for Figure 7 The SAR value hotspot distribution map of the electronic device 20 shown is composed of... Figure 12 It can be seen that the SAR hotspots of electronic device 20 are mainly distributed in the second radiator 120, and the SAR value of electronic device 20 is 2.19 W / kg, which is relatively high.

[0051] Regarding the above Figures 1 to 6 and Figures 7 to 12 It is understood that, in the electronic device 10 of this application, when the first feed source 130 is simultaneously electrically connected to both the first feed point 113 and the electrical connection point 123, the second radiator 120 simultaneously exhibits a resonant current generated by the excitation signal provided by the first feed source 130 and a resonant current generated by electromagnetic coupling with the first radiator 110. Compared to an excitation current with only electromagnetic coupling, the resonant current distribution on the second radiator 120 of this application is more balanced, and the contribution rate of the second radiator 120 to the SAR value of the electronic device 10 is lower. Simultaneously, the first path S1 and the second path S2 are far from the human body and can divert some of the resonant current, thus the second path S2 of the first path S1 can further reduce the SAR value of the electronic device 10. The electronic device 10 of this application, when the first feed source 130 is simultaneously electrically connected to both the first feed point 113 and the electrical connection point 123, has superior radiation performance.

[0052] Please refer to the following: Figure 13 , Figure 13 This is a second structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 may further include a matching circuit 151.

[0053] Matching circuit 151 is electrically connected between the first feed 130 and the electrical connection point 123. Matching circuit 151 is used to perform impedance matching adjustment on the excitation signal fed from the first feed 130 to the electrical connection point 123, so as to adjust the current distribution of the resonant current generated by the excitation of the first feed 130 on the second radiator 120, thereby reducing the contribution of the resonant current on the second radiator 120 to the SAR hotspot.

[0054] Understandably, the matching circuit 151 can adjust the resonant current generated by the excitation of the first feed 130 so that the first radiator 110 and the second radiator 120 can form a first resonant mode and a second resonant mode, thereby reducing the SAR value of the electronic device 10.

[0055] It is understood that the matching circuit 151 may include, but is not limited to, a variable number of capacitors, inductors, and other components. The structure of the matching circuit 151 will differ depending on the frequency range of the first frequency band supported by the first radiator 110 and the second radiator 120. This application does not limit the specific structure of the matching circuit 151.

[0056] It is understandable that when the electrical length of the second radiator 120 is suitable for the first frequency band, the second radiator 120 may not require impedance matching adjustment by the matching circuit 151, and the current distribution under the excitation of the first feed source 130 may contribute less to the SAR hotspot. In this case, such as Figure 1 As shown, the electronic device 10 may also exclude the matching circuit 151. The first feed source 130 is connected to the electrical connection point 123 through structures such as microstrip lines and PCB traces. When the electrical length of the second radiator 120 needs to be adjusted, the electronic device 10 can connect the matching circuit 151 in series between the first feed source 130 and the electrical connection point 123.

[0057] It is understandable that electrical length refers to the equivalent length of a radiator when radiating a signal, or the equivalent length required for electromagnetic wave transmission within a radiating structure. The electrical length of a radiator can be greater than, less than, or equal to its branch length. The electrical length of a radiator is related to the frequencies it supports. A longer electrical length allows the radiator to support lower-frequency wireless signals, while a shorter electrical length allows it to support higher-frequency wireless signals. The electrical length of a radiator can be changed by electrically connecting it to circuits of different impedances.

[0058] Please refer to the following: Figure 14 , Figure 14 This is a schematic diagram of a third structure of the electronic device 10 provided in an embodiment of this application. The electronic device 10 may further include a first switching circuit 152.

[0059] The first switching circuit 152 is electrically connected between the first feed 130 and the electrical connection point 123. The first switching circuit 152 can connect the first feed 130 and the electrical connection point 123, allowing the first radiator 110 and the second radiator 120 to jointly support the transmission and reception of the first wireless signal in the first frequency band. The first switching circuit 152 can also disconnect the electrical connection between the first feed 130 and the electrical connection point 123, allowing the first radiator 110 and the second radiator 120 to jointly support the transmission and reception of the first wireless signal in the second frequency band.

[0060] It is understandable that as the frequency bands of the wireless signals excited by the first feed 130 to the first radiator 110 and the second radiator 120 differ, the SAR values ​​generated by these wireless signals often differ as well. For example, when the first feed 130 is not connected to the electrical connection point 123, the SAR values ​​of the first radiator 110 and the second radiator 120 when supporting the second frequency band are not very high. In this case, the electronic device 10 does not need to adjust the SAR value when supporting the second frequency band. Therefore, the first switching circuit 152 can maintain the state of disconnecting the electrical connection between the first feed 130 and the electrical connection point 123. As another example, when the first feed 130 is not connected to the electrical connection point 123, the SAR values ​​of the first radiator 110 and the second radiator 120 when supporting the first frequency band are higher (e.g., as...). Figures 7 to 12 (As shown in the figure, 2.19W / kg), at this time, the electronic device 10 needs to adjust the SAR value when supporting the first frequency band. The first switching circuit 152 can conduct the electrical connection between the first feed source 130 and the electrical connection point 123 so that the first feed source 130 is simultaneously connected to the first feed point 113 and the electrical connection point 123 and achieves the purpose of reducing the SAR value.

[0061] It is understood that the first wireless signal may be, but is not limited to, a mid-to-high frequency signal, and the first frequency band may be, but is not limited to, the B1 band (1920MHz-2170MHz), the N1 band (1920MHz-2170MHz), the B3 band (1710MHz-1880MHz), or the N3 band (1710MHz-1880MHz). The second frequency band may be, but is not limited to, the N40 band (2300MHz-2400MHz), the B40 band (2300MHz-2400MHz), the B41 band (2496 MHz-2690 MHz), or the N41 band (2496 MHz-2690 MHz). This application does not limit the first and second frequency bands.

[0062] Please refer to the following: Figure 15 , Figure 15 This is a fourth structural schematic diagram of the electronic device 10 provided in the embodiments of this application. The electronic device 10 may further include a second switching circuit 153.

[0063] The second switching circuit 153 is electrically connected between the first feed source 130 and the first feed point 113. The second switching circuit 153 includes multiple switching branches and is used to switch between different switching branches so that the first radiator 110 and the second radiator 120 can support the transmission and reception of the first wireless signal in the first frequency band at different frequencies, or so that the first radiator 110 and the second radiator 120 can support the transmission and reception of the first wireless signal in the second frequency band at different frequencies.

[0064] It is understood that when the first switching circuit 152 connects the electrical connection between the first feed 130 and the electrical connection point 123, the second switching circuit 153 can switch between multiple switching branches so that the first radiator 110 and the second radiator 120 support the transmission and reception of the first wireless signal in the first frequency band at different frequencies.

[0065] It is understandable that when the first switching circuit 152 disconnects the electrical connection between the first feed 130 and the electrical connection point 123, the second switching circuit 153 can also switch between multiple switching branches so that the first radiator 110 and the second radiator 120 support the transmission and reception of the first wireless signal in the second frequency band at different frequencies.

[0066] It is understood that the second switching circuit 153 may include, but is not limited to, an indefinite number of components such as capacitors, inductors, and switches, and the second switching circuit 153 has at least two switching branches that result in different electrical lengths of the first radiator 110.

[0067] The electronic device 10 of this application embodiment, under the action of the first switching circuit 152 and the second switching circuit 153, the first radiator 110 and the second radiator 120 can support a first frequency band of different frequencies or support a second frequency band of different frequencies. The electronic device 10 can support more frequency bands and has a wider range of applications.

[0068] Please refer to the following: Figure 16 , Figure 16 This is a fifth structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 also includes a third switching circuit 154.

[0069] Understandably, one end of the third switching circuit 154 is electrically connected between the first feed source 130 and the first feed point 113, and the other end is grounded. For example, the electronic device 10 includes a first transmission line, a second transmission line, and a third transmission line. One end of the first transmission line is electrically connected to the first feed source 130, one end of the second transmission line and one end of the third transmission line are both electrically connected to the other end of the first transmission line, the other end of the second transmission line is electrically connected to the first feed point 113, and the other end of the third transmission line is electrically connected to the electrical connection point 123. In this case, one end of the third switching circuit 154 can be electrically connected to the first transmission line.

[0070] like Figure 16As shown, the third switching circuit 154 includes a single-pole single-throw switch 1541 and a load element 1542 connected in series. One end of the single-pole single-throw switch 1541 is electrically connected between the first feed source 130 and the first feed point 113, and the other end is electrically connected to one end of the load element 1542. The other end of the load element 1542 is electrically connected to the ground plane 140. The single-pole single-throw switch 1541 can disconnect the electrical connection between the load element 1542 and the first feed source 130 and the first feed point 113, so that the first feed source 130 excites the first radiator 110 and the second radiator 120 to support the transmission and reception of the first wireless signal in the first frequency band. The single-pole single-throw switch 1541 is also used to connect the electrical connection between the load element 1542 and the first feed point 113 and the first feed source 130, so that the first feed source 130 excites the first radiator 110 and the second radiator 120 to support the transmission and reception of the first wireless signal in the third frequency band.

[0071] It is understandable that when the single-pole single-throw switch 1541 disconnects the electrical connection between the load element 1542 and the first feed source 130 and the first feed point 113, the first switching circuit 152 can connect the electrical connection between the first feed source 130 and the electrical connection point 123. At this time, the electronic device 10 can generate the aforementioned Figure 2 and Figure 3 The current distribution shown indicates that the first radiator 110 and the second radiator 120 can support the first wireless signal in the first frequency band.

[0072] It is understandable that when the single-pole single-throw switch 1541 connects the load element 1542 with the first feed point 113 and the first feed source 130, the first switching circuit 152 can connect the first feed source 130 with the electrical connection point 123, or disconnect the first feed source 130 with the electrical connection point 123. For example, when the single-pole single-throw switch 1541 connects the load element 1542 to the first feed point 113 and the first feed source 130, the first switching circuit 152 can disconnect the electrical connection between the first feed source 130 and the electrical connection point 123. At this time, since the excitation signal provided by the first feed source 130 can flow to the ground plane 140 through the third path between the first feed source 130 and the third switching circuit 154, the resonant current generated by the excitation of the first radiator 110 has a strong current distribution in the area near the first ground end 112 and the area near the first free end 111. In addition, the resonant current can also be grounded through the load element 1542. The strong point area of ​​the resonant current can be dispersed in at least three areas. The distribution of the strong point area of ​​the resonant current on the entire first radiator 110 is more uniform, thereby making the SAR value of the third frequency band supported by the first radiator 110 and the second radiator 120 lower.

[0073] For example, when the single-pole single-throw switch 1541 connects the load element 1542 to the first feed point 113 and the first feed source 130, the first switching circuit 152 can also connect the first feed source 130 to the electrical connection point 123. At this time, the first feed source 130 can be electrically connected to the first feed point 113 and the electrical connection point 123, and the third switching circuit 154 can be grounded. The excitation signal provided by the first feed source 130 can flow to the first radiator 110 through the first path S1 between the first feed source 130 and the first feed point 113, or through the third switching circuit 154. The second path S2 between the first feed 130 and the electrical connection point 123 flows to the second radiator 120, and can also flow to the ground plane 140 through the third path between the first feed 130 and the third switching circuit 154. Thus, the resonant current generated by the excitation of the first feed 130 can be dispersed at least along the first path S1, the second path S2 and the third path. The resonant current generated by the excitation of the first feed 130 is more evenly distributed on the first radiator 110 and the second radiator 120. The SAR value is lower when the first radiator 110 and the second radiator 120 jointly support the third frequency band. Specifically, if the third frequency band is the same as the first frequency band, or the third frequency band includes the first frequency band, or the first frequency band includes the third frequency band, then when the single-pole single-throw switch 1541 connects the load element 1542 to the first feed point 113 and the first feed source 130, and the first switching circuit 152 connects the first feed source 130 to the electrical connection point 123, the SAR value of the first frequency band supported by the first radiator 110 and the second radiator 120 is also low. It should be noted that the third frequency band may also be different from the first or second frequency band.

[0074] It is understood that the load element 1542 of the third switching circuit 154 can be, but is not limited to, an inductor. The inductance value of this inductor can be less than or equal to 10 nanohenries, so that the load element 1542 can be a small inductor. When the single-pole single-throw switch 1541 grounds the small inductor, the smaller the inductance value of the inductor, the higher the frequency of the second frequency band supported by the first radiator 110, and the electronic device 10 can reduce the SAR value of higher frequency wireless signals. Of course, it should be noted that the load element 1542 of this application can also be a circuit structure formed by one or more inductors, capacitors, and resistors connected in series or in parallel. Any structure with a certain impedance can be the load element 1542 of this application embodiment. The specific structure of the load element 1542 of this application embodiment is not limited.

[0075] It is understandable that the distance between the first feed point 113 and the first free end 111 can be less than the distance between the first feed point 113 and the first ground end 112, so that the first feed point 113 is closer to the first free end 111. The resonant current generated by the first feed source 130 exciting the first radiator 110 can have a strong current distribution in the region near the first ground end 112 and the region near the first free end 111 of the first radiator 110. The strong region of the resonant current is more evenly distributed on the entire first radiator 110. When the first radiator 110 supports the transmission and reception of the first wireless signal, such as the first wireless signal of the first frequency band, it can have both better radiation performance and a lower SAR value.

[0076] The electronic device 10 of this application embodiment can simultaneously connect the first feed point 113 and the electrical connection point 123 via the first feed source 130 to reduce the SAR value of the first radiator 110 and the second radiator 120 supporting the first frequency band wireless signal. The electronic device 10 can also connect the load element 1542 with the first feed point 113 and the first feed source 130 via the single-pole single-throw switch 1541 to reduce the SAR value of the first radiator 110 and the second radiator 120 supporting the third frequency band. When the first frequency band and the third frequency band are equal or the third frequency band has an inclusion relationship with the first frequency band, the electronic device 10 can also simultaneously connect the first feed point 113 and the electrical connection point 123 via the first feed source 130, and connect the load element 1542 with the first feed point 113 and the first feed source 130 via the single-pole single-throw switch 1541 to further reduce the SAR value of the first frequency band or the third frequency band. The electronic device 10 of this application can reduce the SAR value of the first wireless signal supported by the first radiator 110 and the second radiator 120.

[0077] Please refer to the following: Figure 17 , Figure 17 This is a sixth structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 also includes a third radiator 160 and a second feed source 170.

[0078] The third radiator 160 can be disposed on the side of the second ground terminal 122 of the second radiator 120 away from the second free end 121. The third radiator 160 includes a first end 161, a second end 162, and a second feed point 163. The first end 161 can be spaced apart from the second ground terminal 122 of the second radiator 120 and electrically connected to the grounding plane 140 to achieve grounding. The second end 162 can extend in a direction away from the second radiator 120. The second feed point 163 can be located in the middle region of the third radiator 160. For example, the ratio of the distance between the second feed point 163 and the first end 161 to the distance between the second feed point 163 and the second end 162 can be between two-thirds and three-half. The second feed source 170 can be electrically connected to the second feed point 163, and the second feed source 170 can excite the third radiator 160 to support the transmission and reception of the second wireless signal.

[0079] Understandably, please combine Figure 17 Please refer to Figure 18 , Figure 18 for Figure 17 The diagram shows a first current distribution of the electronic device 10. When the second feed 170 is electrically connected to the middle of the third radiator 160, the second feed 170 can excite the third radiator 160 to generate a fifth resonant mode. This fifth resonant mode can generate a fifth resonant current I5 on the third radiator 160. The fifth resonant current I5 can flow from the second feed point 163 to the first end 161 and from the second feed point 163 to the second end 162. At this time, the area near the second feed point 163, the area near the first end 161, and the area near the second end 162 can all have a strong current distribution. The strong area of ​​the fifth resonant current I5 is more evenly distributed on the entire third radiator 160. When the third radiator 160 supports the transmission and reception of the second wireless signal, it can have both better radiation performance and a lower SAR value.

[0080] Understandably, please combine Figure 17 Please refer to Figure 19 , Figure 19 for Figure 17 The diagram shows a second current distribution of the electronic device 10. The second feed 170 can also excite the third radiator 160 to generate a sixth resonant mode, which can form a sixth resonant current I6 flowing from the first end 161 to the second end 162 on the third radiator 160. This sixth resonant mode can serve as an auxiliary resonant mode to the fifth resonant mode, so that the second feed 170 can excite the third radiator 160 to generate both the fifth resonant mode (as the main radiation mode) and the sixth resonant mode (as the auxiliary radiation mode), and that the fifth and sixth resonant modes together support the transmission and reception of the second wireless signal.

[0081] It is understood that, in the fifth and sixth resonant modes, the third radiator 160 may, but is not limited to, supporting a second wireless signal in a low-frequency band. Of course, the third radiator 160 may also support wireless signals in other frequency bands; this application embodiment does not limit this.

[0082] In this embodiment of the electronic device 10, the third radiator 160, under the excitation of the second feed 170, can also achieve superior radiation performance and a lower SAR value when supporting the second wireless signal. Furthermore, when the third radiator 160 forms an LB antenna, and the second radiator 120 and the first radiator 110 form an MHB antenna, the LB antenna and the MHB antenna are tuned independently, making it easy to decouple the LB band and the MHB band, thereby improving the isolation between the antennas.

[0083] In this regard, please combine Figure 17 Please refer to Figure 20 , Figure 20 for Figure 17 The diagram shows an electrical connection of the electronic device 10. The electronic device 10 also includes a fourth switching circuit 155, which may include one or more (two or more, not described in detail below) first branches 1551 and one or more second branches 1552.

[0084] One end of each first branch 1551 can be electrically connected to the second ground terminal 122 of the second radiator 120, and the other end of each first branch 1551 can be electrically connected to the grounding plane 140 to achieve grounding. One end of each second branch 1552 can be electrically connected to the first terminal 161 of the third radiator 160, and the other end of each second branch 1552 can be electrically connected to the grounding plane 140 to achieve grounding. The fourth switching circuit 155 can conduct the electrical connection between the second ground terminal 122 of the second radiator 120 and one of the first branches 1551, allowing the second radiator 120 to be grounded through one of the first branches 1551, thus enabling the second radiator 120 to support the transmission and reception of the first wireless signal. The fourth switching circuit 155 can also conduct the electrical connection between the first terminal 161 of the third radiator 160 and one of the second branches 1552, allowing the third radiator 160 to be grounded through one of the second branches 1552, thus enabling the third radiator 160 to support the transmission and reception of the second wireless signal. Thus, the second radiator 120 and the third radiator 160 can be grounded through different branches within the same fourth switching circuit 155.

[0085] It is understood that the fourth switching circuit 155 may further include a switching switch 1553, which may include one or more input terminals and multiple output terminals, such that each first branch 1551 can be connected to one output terminal and each second branch 1552 can be connected to another output terminal. The switching switch 1553 can control the input terminals to conduct different output terminals to achieve different branch grounding. For example, the switching switch 1553 may be an SP4T switch. Of course, since the switching adjustment of the third radiator 160 and the switching adjustment of the second radiator 120 can be independent of each other, the switching switch 1553 may also be a multi-pole multi-throw switch, so that at the same time, the switching switch 1553 can simultaneously conduct one first branch 1551 and one second branch 1552. The specific structure of the fourth switching circuit 155 is not limited in the embodiments of this application.

[0086] It should be noted that the fourth switching circuit 155 may not include the switching switch 1553. The first branch 1551 and the second branch 1552 can be state-adjustable circuit structures, so that the first branch 1551 and the second branch 1552 can have different on or off states under different parameter conditions. The specific structure of the fourth switching circuit 155 in this application embodiment is not limited.

[0087] It is understood that the fourth switching circuit 155 may include a first branch 1551, such that when the second radiator 120 returns to ground through the first branch 1551, the second radiator 120 can support the corresponding frequency band within the first wireless signal. Of course, if the second radiator 120 needs to support more frequency bands, the fourth switching circuit 155 may also include multiple first branches 1551, and this application embodiment does not limit this.

[0088] It is understood that when the second wireless signal includes wireless signals of multiple sub-frequency bands, the fourth switching circuit 155 may include multiple second branches 1552. The fourth switching circuit 155 may also control the first terminal 161 to be grounded through different second branches 1552 to realize the transmission and reception of second wireless signals of different sub-frequency bands. For example, the fourth switching circuit 155 may include three second branches 1552. When the fourth switching circuit 155 switches between the three second branches 1552, it can enable the third radiator 160 to support low-frequency bands B28 (703MHz to 803MHz), B5 (824MHz-894MHz), and B8 (880MHz-960MHz) to achieve low-frequency full-band coverage. Of course, the fourth switching circuit 155 may also include other numbers of second branches 1552 to enable the third radiator 160 to support wireless signals of other frequency bands. This application embodiment does not limit this.

[0089] It is understood that the first branch 1551 and the second branch 1552 may include a single capacitor or an inductor, or a combination of multiple capacitors and inductors. This application does not limit the specific structure of the first branch 1551 and the second branch 1552.

[0090] In the electronic device 10 of this application embodiment, the third radiator 160 can serve as an LB antenna and, under the action of multiple second branches 1552 of the fourth switching circuit 155, can achieve full coverage of multiple sub-band wireless signals in the low-frequency band; the first radiator 110 and the second radiator 120 together can form an MHB antenna, and the first radiator 110 and the second radiator 120, with the support of the first switching circuit 152 and the fourth switching circuit 155, can achieve full coverage of mid-to-high frequency wireless signals.

[0091] For the structure of the aforementioned electronic device 10, please refer to... Figure 21 , Figure 21 This is a seventh structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Figure 21 As shown, the electronic device 10 may also include a display screen 400, a mid-frame 500, a circuit board 600, a battery 700, and a back cover 800.

[0092] A display screen 400 is disposed on the mid-frame 500 to form the display surface of the electronic device 10 for displaying images, text, and other information. The display screen 400 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen, among other types.

[0093] The middle frame 500 may include a side frame 510 and a middle plate 520. The side frame 510 may be a hollow frame structure forming the outer frame of the electronic device 10, and the middle plate 520 may be a thin plate or sheet structure. The middle frame 500 provides support for electronic devices or functional components in the electronic device 10, allowing the electronic devices and functional components of the electronic device 10 to be mounted together. For example, the middle frame 500 may have structures such as grooves, protrusions, and through holes to facilitate the mounting of electronic devices or functional components of the electronic device 10. It is understood that the material of the middle frame 500 may include metal or plastic.

[0094] The circuit board 600 is mounted on the mid-frame 500 for fixation and is sealed inside the electronic device 10 by the rear cover 800. The circuit board 600 may integrate a processor, as well as one or more functional components such as a headphone jack, accelerometer, gyroscope, and motor. Simultaneously, the display screen 400 can be electrically connected to the circuit board 600 to control its display via the processor on the circuit board 600.

[0095] The battery 700 is mounted on the mid-frame 500 and sealed inside the electronic device 10 by the rear cover 800. The battery 700 is electrically connected to the circuit board 600 to power the electronic device 10. The circuit board 600 may contain a power management circuit. This power management circuit distributes the voltage supplied by the battery 700 to the various electronic components within the electronic device 10.

[0096] The back cover 800 is connected to the middle frame 500. For example, the back cover 800 can be attached to the middle frame 500 using an adhesive such as double-sided tape to achieve the connection with the middle frame 500. The back cover 800, together with the middle frame 500 and the display screen 400, seals the electronic components and functional parts of the electronic device 10 inside the electronic device 10, thereby providing protection for the electronic components and functional parts of the electronic device 10.

[0097] It is understood that the ground plane 140 in this embodiment of the application can be formed on the middle plate 520 of the carrier plate 300, the rear shell 800, the circuit board 600 or the middle frame 500. For example, a conductor region with zero potential can be provided on the carrier plate 300, the rear shell 800, the circuit board 600 or the middle plate 520, and the ground plane 140 can be provided on the conductor region.

[0098] It is understood that one or more of the first feed source 130, the second feed source 170, the matching circuit 151, the first switching circuit 152 to the fourth switching circuit 155 in the embodiments of this application may be, but are not limited to, disposed on the circuit board 600; of course, one or more of the above components may also be disposed on the small board of the electronic device 10. The embodiments of this application do not limit the specific placement of the above structures.

[0099] It is understood that the above are merely exemplary examples of the electronic device 10. The electronic device 10 in this application embodiment may also include components such as a camera, a sensor, and a sound-to-electric conversion device. These components can be found in the descriptions in related technologies and will not be repeated here.

[0100] In this regard, please combine Figure 21 Please refer to Figure 22 , Figure 22This is an eighth structural schematic diagram of the electronic device 10 provided in the embodiments of this application. The electronic device 10 may further include a first frame 511 and a second frame 512 that are interconnected.

[0101] The first border 511 and the second border 512 can be the outer borders of the middle frame 500. The first border 511 and the second border 512 can be bent and connected so that the first border 511 and the second border 512 are not collinear. The length of the first border 511 can be less than the length of the second border 512. The first border 511 can be the short border of the electronic device 10, and the second border 512 can be the long border of the electronic device 10. The first radiator 110 and the second radiator 120 can be disposed on the first border 511. A portion of the third radiator 160 can be disposed on the first border 511, and another portion of the third radiator 160 can be disposed on the second border 512.

[0102] It is understood that the electronic device 10 may also include other borders, such as a third border 513 and a fourth border 514. The third border 513 may be disposed opposite to the first border 511, and the fourth border 514 may be disposed opposite to the second border 512, so that the middle frame 500 may be a rectangular frame. It should be noted that the middle frame 500 may also be other shapes, and the specific structure of the middle frame 500 is not limited in this embodiment.

[0103] It is understood that the first frame 511 and the second frame 512 are conductive structures, and slots can be formed on the first frame 511 and the second frame 512 to create metal branches. The first radiator 110, the second radiator 120, and the third radiator 160 may include at least one metal branch, thus the first radiator 110 to the third radiator 160 can be frame antennas. Of course, the first radiator 110 to the third radiator 160 can also be, but are not limited to, antennas in the form of flexible printed circuit boards (FPCs) or mechanical design antennas (MDAs) connected to the first frame 511 or the second frame 512. The specific arrangement of the three radiators is not limited in the embodiments of this application.

[0104] It is understood that the first frame 511, the second frame 512, the third frame 513, and the fourth frame 514 are all outer frames of the electronic device 10. When the first radiator 110 and the second radiator 120 are frame antennas, the distance between the carrier plate 300 located inside the electronic device 10 and the frame where the first radiator 110 or the second radiator 120 is located is greater than the distance between the first radiator 110 or the second radiator 120 and the frame, thereby making the carrier plate 300 further away from the human body.

[0105] It is understood that the first frame 511 can be the bottom frame when the user holds the electronic device 10 upright, and the second frame 512 can be the side frame when the user holds the electronic device 10 upright. Furthermore, the area between the second radiator 120 and the first radiator 110 can correspond to the USB port opened on the first frame 511, and the first frame 511 can have one less gap to form the first radiator 110 and the second radiator 120. Therefore, the first radiator 110 to the third radiator 160 of this embodiment can form a lower antenna scheme for the electronic device 10 that balances low cost and low SAR value, and the first radiator 110 and the second radiator 120 can be rationally arranged according to the appearance of the electronic device 10.

[0106] It should be noted that the antenna solution of this application is not only applicable to electronic devices such as mobile phones, but also to electronic devices such as tablet circuits, PCs, and large screens; at the same time, the antenna implementation of this application is not limited to the form of a metal frame, and the embodiments of this application do not limit it in this regard.

[0107] It should be understood that in the description of this application, terms such as "first" and "second" are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0108] The electronic devices provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electronic device, comprising: Including a frame; the electronic device also includes: The first radiator includes a first free end, a first feed point, and a first grounding end, wherein the first grounding end is electrically connected to the grounding plane to achieve grounding. The second radiator includes a second free end, an electrical connection point, and a second grounding end. The second free end is spaced apart from the first free end, and the second grounding end extends in a direction away from the first radiator and is electrically connected to the grounding plane to achieve grounding. The first feed source is electrically connected to the first feed point and the electrical connection point respectively. The first feed source is used to excite the first radiator and the second radiator to jointly support the transmission and reception of the first wireless signal in the first frequency band. The first wireless signal is a mid-to-high frequency wireless signal. A first switching circuit is electrically connected between the first feed source and the electrical connection point, and is used to connect or disconnect the electrical connection between the first feed source and the electrical connection point. A support plate is used to support the first feed source. The support plate is disposed inside the electronic device, and the minimum distance between the support plate and the frame is greater than the maximum distance between the first radiator, the second radiator and the frame. The third switching circuit includes a single-pole single-throw switch and a load element connected in series. One end of the single-pole single-throw switch is electrically connected between the first feed source and the first feed point, and the other end is electrically connected to one end of the load element. The other end of the load element is electrically connected to the ground plane. A third radiator includes a first end, a second feed point, and a second end. The first end is spaced apart from and grounded to the second ground end. The second end extends in a direction away from the second radiator. The second feed point is located in the central region of the third radiator. The second feed source is electrically connected to the second feed point. The second feed source is used to excite the third radiator to support the transmission and reception of the second wireless signal, which is a low-frequency wireless signal. The frame includes a first frame and a second frame that are bent and connected. The length of the first frame is less than the length of the second frame. The first radiator and the second radiator are disposed on the first frame. A portion of the third radiator is disposed on the first frame and another portion of the third radiator is disposed on the second frame. The area between the first radiator and the second radiator corresponds to the USB port opened on the first frame.

2. The electronic device of claim 1, wherein, The electronic device also includes: A matching circuit is electrically connected between the first feed source and the electrical connection point. The matching circuit is used to perform impedance matching adjustment on the excitation signal fed from the first feed source to the electrical connection point.

3. The electronic device of claim 1, wherein, The first feed source is used to excite the first radiator and the second radiator to form a first resonant mode and a second resonant mode to jointly support the transmission and reception of the first wireless signal in the first frequency band; wherein, The first resonant mode forms a first resonant current flowing from the second free end toward the second ground end on the second radiator; The second resonant mode forms a second resonant current on the first radiator that flows from the first free end toward the first ground end.

4. The electronic device according to claim 1, characterized in that, The first switching circuit is used to connect the electrical connection between the first feed source and the electrical connection point, so that the first radiator and the second radiator jointly support the transmission and reception of the first wireless signal in the first frequency band. The first switching circuit is also used to disconnect the electrical connection between the first feed source and the electrical connection point, so that the first radiator and the second radiator jointly support the transmission and reception of the first wireless signal in the second frequency band.

5. The electronic device of claim 4, wherein, The first frequency band is either the B1 band or the B3 band; and / or, the second frequency band is either the N40 band or the B41 band.

6. The electronic device of claim 1, wherein, The electronic device also includes: The second switching circuit is electrically connected between the first feed source and the first feed point. The second switching circuit includes multiple switching branches and is used to switch between different switching branches so that the first radiator and the second radiator support the transmission and reception of the first wireless signal of the first frequency band at different frequencies.

7. The electronic device according to any one of claims 1 to 6, characterized in that, The single-pole single-throw switch is used to disconnect the electrical connection between the load element and the first feed source and the first feed point, so that the first feed source excites the first radiator and the second radiator to support the transmission and reception of the first wireless signal in the first frequency band. The single-pole single-throw switch is also used to connect the load element to the first feed point and the first feed source, so that the first feed source excites the first radiator and the second radiator to support the transmission and reception of the first wireless signal in the third frequency band.

8. The electronic device of claim 7, wherein, The load element is an inductor, and the inductance value of the inductor is no greater than 10 nanohenries.

9. The electronic device of claim 1, wherein, The electronic device also includes: A fourth switching circuit, one end of which is electrically connected to the second grounding terminal and the other end of which is electrically connected to the grounding plane; the fourth switching circuit includes one or more first branches and one or more second branches, one end of each first branch and one end of each second branch are electrically connected to the second grounding terminal, and the other end of each first branch and the other end of each second branch are electrically connected to the grounding plane to achieve grounding; wherein... The fourth switching circuit is used to connect the second ground terminal to one of the first branches to enable the transmission and reception of the first wireless signal. The fourth switching circuit is also used to connect the first terminal to one of the second branches to enable the transmission and reception of the second wireless signal.

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