Antenna device and electronic equipment

Abstract

The invention provides an antenna device and electronic equipment, a coupling gap is formed between a first free end of a first radiator and a second free end of a second radiator of the antenna device, and a first grounding end of the first radiator and a second grounding end of the second radiator are far away from each other and are grounded; one end of the coupling amount adjusting circuit is electrically connected between the signal source and the feeding point, and the other end is electrically connected to the second radiator; the signal source excites the first radiator and the second radiator to jointly generate a resonance mode and support receiving and transmitting of wireless signals, part of resonance current formed by the resonance mode is electromagnetically coupled to the second radiator through the coupling gap, and the other part of resonance current flows between the first radiator and the second radiator through the coupling amount adjusting circuit. On this basis, the resonant current can form two current paths between the first radiator and the second radiator through the coupling gap and the coupling amount adjusting circuit, the resonant current of the first radiator and the second radiator is more dispersed, and the SAR value of the antenna device is low.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna device and an electronic device. Background Art

[0002] With the development of communication technology, antenna devices and electronic devices such as smartphones can realize more and more functions, and the communication modes of antenna devices and electronic devices are also more diversified. Each communication mode requires a corresponding antenna to support it. Generally, in the process of antenna design, the electromagnetic wave absorption rate (Specific absorption rate, referred to as "SAR") is used to evaluate the impact of electromagnetic radiation generated by antenna devices and electronic devices on the human body. The larger the SAR value, the greater the impact on the human body.

[0003] Relevant laws stipulate that the SAR value of mobile phone antennas cannot exceed 1.6W / kg. The antenna devices and electronic devices of related technologies are often designed with a power fallback mechanism. When the SAR value of the antenna is detected to be too large, the antenna transmission power will be reduced to reduce the antenna SAR value. However, the fallback operation will seriously affect the radiation performance of the antenna. Therefore, it is urgent to provide an antenna design solution with a lower SAR value and better radiation performance. Summary of the invention

[0004] The present application provides an antenna device and an electronic device, which can have a lower SAR value and better radiation performance when supporting wireless signals.

[0005] In a first aspect, the present application provides an antenna device, comprising:

[0006] A first radiator comprises a first free end, a feeding point and a first grounding end, wherein the first grounding end is grounded;

[0007] A signal source, electrically connected to the feeding point;

[0008] A second radiator, comprising a second free end and a second ground end, wherein a coupling gap is formed between the second free end and the first free end, and the second ground end extends in a direction away from the first radiator and is grounded;

[0009] A coupling adjustment circuit, one end of which is electrically connected between the signal source and the feeding point, and the other end of which is electrically connected to the second radiator; wherein,

[0010] The signal source is used to excite the first radiator and the second radiator to jointly generate a resonant mode and support the transmission and reception of wireless signals. Part of the resonant current formed by the resonant mode is electromagnetically coupled to the second radiator through the coupling gap, and another part of the resonant current flows between the first radiator and the second radiator through the coupling amount adjustment circuit.

[0011] In a second aspect, the present application also provides an electronic device, comprising the antenna device as described above.

[0012] In the antenna device and electronic device of the present application, a coupling gap is formed between the first free end of the first radiator and the second free end of the second radiator, the first grounded end of the first radiator and the second grounded end of the second radiator are separated from each other and grounded, and the first radiator and the second radiator can form a mouth-to-mouth antenna radiation structure; at the same time, one end of the coupling amount adjustment circuit is electrically connected between the signal source and the feeding point of the first radiator, and the other end of the coupling amount adjustment circuit is electrically connected to the second radiator. The resonant current generated by the excitation of the signal source can flow on the first radiator and be electromagnetically coupled to the second radiator through the coupling gap and flow on the second radiator. At the same time, the resonant current can also flow between the first radiator and the second radiator through the coupling amount adjustment circuit. Therefore, the resonant current can form at least two current paths between the first radiator and the second radiator through the coupling gap and the coupling amount adjustment circuit, the resonant current can be more dispersed between the first radiator and the second radiator, and the current density and current intensity on the first radiator and the second radiator are more balanced, which can reduce the SAR value of the antenna device, reduce the antenna power back-off value, and improve the antenna performance in the actual user usage scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0014] Figure 1 A first structural schematic diagram of an antenna device provided in an embodiment of the present application.

[0015] Figure 2 for Figure 1 A schematic diagram of a first current distribution of the antenna device is shown.

[0016] Figure 3 for Figure 1 A second current distribution diagram of the antenna device is shown.

[0017] Figure 4 for Figure 1A schematic diagram of an S11 parameter curve of the antenna device is shown.

[0018] Figure 5 A second structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0019] Figure 6 for Figure 5 A first current distribution schematic diagram of the antenna device is shown.

[0020] Figure 7 for Figure 5 A second current distribution diagram of the antenna device is shown.

[0021] Figure 8 A third structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0022] Fig. 9 A fourth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0023] Fig.10 A fifth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0024] Fig.11 A sixth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0025] Fig.12 This is a seventh structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0026] Fig.13 This is a schematic diagram of the eighth structure of the antenna device provided in an embodiment of the present application.

[0027] Fig.14 This is a ninth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0028] Fig.15 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0029] Fig.16 A second structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the attached examples of the present application Figure 1 To Attachment Fig.16 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] The embodiments of the present application provide an antenna device and an electronic device. The antenna device can realize a wireless communication function. For example, the antenna device can transmit, but is not limited to, Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, third-generation mobile communication technology (3rd-Generation, 3G), fourth-generation mobile communication technology (4th-Generation, 4G), fifth-generation mobile communication technology (5th-Generation, 5G), near field communication (NFC), Bluetooth (BT), ultra-wideband (UWB) signals, etc.

[0032] Among them, please refer to Figure 1 , Figure 1 This is a schematic diagram of a first structure of an antenna device 100 provided in an embodiment of the present application. The antenna device 100 includes a first radiator 110 , a second radiator 120 , a signal source 130 and a coupling adjustment circuit 140 .

[0033] The first radiator 110 includes a first free end 111 and a first grounding end 112. The first grounding end 112 can be electrically connected to the ground system 150 to achieve grounding. The first free end 111 can be the end or open end of the first radiator 110. The first radiator 110 can also include a feeding point 113. The feeding point 113 can be arranged between the first free end 111 and the first grounding end 112. Alternatively, the feeding point 113 can be arranged at the first free end 111 so that the first free end 111 is the feeding end of the first radiator 110. The signal source 130 can be directly or indirectly electrically connected to the feeding point 113. The signal source 130 can provide an excitation signal to the first radiator 110. The second radiator 120 includes a second free end 121 and a second ground end 122. The second free end 121 can form a coupling gap 101 with the first free end 111 of the first radiator 110. The second free end 121 can be the end or open end of the second radiator 120. The second ground end 122 extends in a direction away from the first radiator 110 and is grounded. The first radiator 110 and the second radiator 120 can form a mouth-to-mouth radiation structure. One end of the coupling adjustment circuit 140 can be directly or indirectly electrically connected between the signal source 130 and the feeding point 113, and the other end of the coupling adjustment circuit 140 can be directly or indirectly electrically connected to the second radiator 120. Among them, the signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly generate a resonant mode and support the transmission and reception of wireless signals (transmission and reception include transmission and reception, which will not be repeated below). Part of the resonant current formed by the resonant mode can be electromagnetically coupled to the second radiator 120 through the coupling gap 101, and another part of the resonant current can flow between the first radiator 110 and the second radiator 120 through the coupling amount adjustment circuit 140.

[0034] It is understandable that electromagnetic coupling is also called capacitive coupling, which means that when an electric field is generated between two radiators, a signal on one radiator can be transmitted to another radiator through the electric field, so that the two radiators can achieve electrical signal conduction even when they are not in direct contact or connection. In the embodiment of the present application, part of the resonant current generated by the excitation of the signal source 130 can be capacitively coupled between the first radiator 110 and the second radiator 120.

[0035] It is understandable that both the first radiator 110 and the second radiator 120 can be radiating devices with conductor structures. The first radiator 110 and the second radiator 120 can be, but are not limited to, straight strips, bends, or other shapes, and the extension directions of the first radiator 110 and the second radiator 120 can be the same or different. The embodiment of the present application does not limit the specific shapes of the first radiator 110 and the second radiator 120.

[0036] It can be understood that the ground system 150 can form a common ground for the antenna device 100 or the electronic device. The ground system 150 can be a plane or structure with zero electric potential. For example, the ground system 150 can be formed by a conductor, a printed circuit, or a metal printed layer in the antenna device 100 or the electronic device; for another example, the ground system 150 can be formed on a main board, a small board, or other supporting board of the electronic device; for another example, the ground system 150 can also be formed on a frame of the electronic device (such as the middle board 320 described later). The specific setting position of the ground system 150 is not limited in the embodiment of the present application.

[0037] It is understandable that the signal source 130 can provide an excitation signal. The signal source 130 can convert a high-frequency excitation signal or a bound electromagnetic wave into radiated electromagnetic energy to excite the first radiator 110 and the second radiator 120 to support the transmission of wireless signals. At the same time, the first radiator 110 and the second radiator 120 can also capture and bind electromagnetic waves in the free space and transmit them to the signal source 130 to form a current signal, so that the first radiator 110 and the second radiator 120 can support the reception of wireless signals.

[0038] It can be understood that the coupling adjustment circuit 140 can be, but is not limited to, a circuit structure formed by components such as capacitors, inductors, and switches. For example, the coupling adjustment circuit 140 can be a capacitive load circuit. The so-called capacitive load circuit refers to a load with a capacitance parameter. The capacitive load circuit can make the load current exceed the structure of a phase difference characteristic of its load circuit. The capacitive load circuit can be, but is not limited to, a structure including one or more capacitive elements connected in series and in parallel to the ground. Among them, the coupling adjustment circuit 140 can make the excitation signal provided by the signal source 130 be coupled to the second radiator 120 through the coupling adjustment circuit 140, so that the coupling adjustment circuit 140 can adjust the coupling degree between the first radiator 110 and the second radiator 120.

[0039] It can be understood that when the antenna device 100 is not provided with a coupling adjustment circuit 140, the resonant current generated by the signal source 130 exciting the first radiator 110 and the second radiator 120 can flow on the first radiator 110 and be electromagnetically coupled to the second radiator 120 through the coupling gap 101 between the first radiator 110 and the second radiator 120 and flow on the second radiator 120. Since the first radiator 110 and the second radiator 120 share the same signal source 130, the resonant current flows unevenly on the first radiator 110 and the second radiator 120, and the current density on one radiator will be greater than the current density on the other radiator. This makes the SAR value of the first radiator 110 and the second radiator 120 higher when supporting wireless signals, which is not only not conducive to the health of the user, but also may trigger the power back-off mechanism and affect the radiation performance of the antenna device 100.

[0040] The antenna device 100 of the embodiment of the present application is provided with a coupling adjustment circuit 140, one end of which is electrically connected between the signal source 130 and the feeding point 113, and the other end of the coupling adjustment circuit 140 is electrically connected to the second radiator 120. The resonant current generated by the excitation signal provided by the signal source 130 can flow on the first radiator 110 and be electromagnetically coupled to the second radiator 120 through the coupling gap 101 and flow on the second radiator 120. At the same time, the resonant current can also flow to the second radiator 120 through the coupling adjustment circuit 140. Therefore, the resonant current can form at least two flow paths between the first radiator 110 and the second radiator 120 through the coupling gap 101 and the coupling adjustment circuit 140. The current distribution of the resonant current on the first radiator 110 and the second radiator 120 is more dispersed, and the current density and current intensity on the first radiator 110 and the second radiator 120 are more balanced, which can reduce the SAR value of the antenna device 100, reduce the antenna power back-off value, and improve the antenna performance in the actual user usage scenario.

[0041] The signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly generate at least one of the first resonance mode and the second resonance mode. The first radiator 110 and the second radiator 120 can support the transmission and reception of wireless signals under the action of at least one resonance mode.

[0042] It can be understood that the signal source 130 can excite the first radiator 110 and the second radiator 120 to generate a first resonance mode to form a first resonance current I1, such as Figure 2 As shown, Figure 2 for Figure 1In the schematic diagram of the first current distribution of the antenna device 100 shown in the figure, the first resonant current I1 can flow from the first ground end 112 toward the first free end 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120 and flow from the second free end 121 toward the second ground end 122 on the second radiator 120 to form a first current path. The current flow directions of the first resonant current I1 on the first radiator 110 and the second radiator 120 are the same, and the first resonant mode can excite the first radiator 110 and the second radiator 120 to generate current distribution in the same direction. Among them, since one end of the coupling adjustment circuit 140 is electrically connected between the signal source 130 and the feeding point 113, and the other end is electrically connected to the second radiator 120, part of the first resonant current I1 can also flow between the first radiator 110 and the second radiator 120 through the coupling adjustment circuit 140. The coupling adjustment circuit 140 can make the current density of the first resonant current I1 on the first radiator 110 and the second radiator 120 equal, and the distribution of the first resonant current I1 on the first radiator 110 and the second radiator 120 is more balanced. The current density or electric field strength of the first resonant current I1 on the first radiator 110 and the second radiator 120 is equal (including approximately equal), so that the SAR value generated by the first resonant mode is lower, and the first resonant mode can have better antenna performance.

[0043] It can be understood that the signal source 130 can excite the first radiator 110 and the second radiator 120 to generate a second resonance mode to form a second resonance current I2, such as Figure 3 As shown, Figure 3 for Figure 1As shown in the second current distribution diagram of the antenna device 100, the second resonant current I2 can flow from the first ground end 112 toward the first free end 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120 and flow from the second ground end 122 toward the second free end 121 on the second radiator 120 to form a second current path. The second resonant current I2 flows in opposite directions on the first radiator 110 and the second radiator 120, and the second resonant mode can excite the first radiator 110 and the second radiator 120 to generate opposite current distributions. Among them, since one end of the coupling adjustment circuit 140 is electrically connected between the signal source 130 and the feeding point 113, and the other end is electrically connected to the second radiator 120, part of the second resonant current I2 can also flow between the first radiator 110 and the second radiator 120 through the coupling adjustment circuit 140. The coupling adjustment circuit 140 can make the current density of the second resonant current I2 on the first radiator 110 and the second radiator 120 equal, and the distribution of the second resonant current I2 on the first radiator 110 and the second radiator 120 is more balanced. The current density or electric field strength of the second resonant current I2 on the first radiator 110 and the second radiator 120 is equal (including approximately equal), so that the SAR value generated by the second resonant mode is lower, and the second resonant mode can have better antenna performance.

[0044] It can be understood that, in the antenna device 100 of the embodiment of the present application, the signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly generate the first resonance mode without generating the second resonance mode; or, the signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly generate the second resonance mode without generating the first resonance mode; or, the signal source 130 can also excite the first radiator 110 and the second radiator 120 to simultaneously generate the first resonance mode and the second resonance mode, that is, the first radiator 110 and the second radiator 120 can simultaneously have the first resonance current I1 and the second resonance current I2, and the first resonance current I1 can be along Figure 2 The current path shown in FIG. 1 flows on the first radiator 110 and the second radiator 120, and the second resonant current I2 can flow along Figure 3 The current path shown flows on the first radiator 110 and the second radiator 120 .

[0045] It can be understood that when the signal source 130 excites the first radiator 110 and the second radiator 120 to simultaneously generate the first resonance mode and the second resonance mode, the center frequency of the first resonance mode is different from the center frequency of the second resonance mode, so that the first radiator 110 and the second radiator 120 can support wireless signals of different frequency bands or support the transmission and reception of wireless signals with a wider frequency band under the joint action of the first resonance mode and the second resonance mode.

[0046] For example, see Figure 4 , Figure 4 for Figure 1 A schematic diagram of an S11 parameter curve of the antenna device 100 is shown in FIG. Figure 4 As shown, the first radiator 110 and the second radiator 120 can jointly generate the first resonance mode P1 and the second resonance mode P2, the center frequency of the first resonance mode P1 can be lower than the center frequency of the second resonance mode P2, the first resonance mode P1 can but is not limited to covering the uplink signal frequency of the wireless signal supported by the first radiator 110 and the second radiator 120, and the second resonance mode P2 can but is not limited to covering the downlink signal frequency of the wireless signal supported by the first radiator 110 and the second radiator 120, so that the first resonance mode P1 and the second resonance mode P2 can jointly cover a wireless signal of a wider frequency band. Among them, the first radiator 110 and the second radiator 120 can cover the middle and high frequency bands under the action of the first resonance mode P1 and the second resonance mode P2; of course, the first resonance mode P1 and the second resonance mode P2 can also cover other frequency bands, which is not limited in the embodiment of the present application.

[0047] It can be understood that the wireless signal corresponding to the first resonance mode P1 may also be a wireless signal of a different frequency band from the wireless signal corresponding to the second resonance mode P2, and the two wireless signals may be spaced apart from each other or partially intersect in the frequency spectrum and have different center frequencies. For example, in the first resonance mode, the first radiator 110 and the second radiator 120 may support wireless signals in the B3 frequency band; in the second resonance mode, the first radiator 110 and the second radiator 120 may support wireless signals in the B1 frequency band. Thus, the first radiator 110 and the second radiator 120 can support wireless signals in two frequency bands, and the antenna device 100 has a wider range of applicable scenarios.

[0048] It can be understood that when the signal source 130 excites the first radiator 110 and the second radiator 120 to generate the first resonant mode or the second resonant mode, at this time, the wireless signals corresponding to the first resonant mode and the second resonant mode can be the same wireless signal (at this time the antenna device 100 can support the same wireless signal in different resonant modes) or different wireless signals (at this time the antenna device 100 can support different wireless signals in different resonant modes), and the embodiments of the present application are not limited to this.

[0049] It should be noted that the above is only an exemplary description of the wireless signals supported by the first resonance mode and the second resonance mode. The first resonance mode and the second resonance mode may also support other wireless signals, which is not limited in the embodiments of the present application.

[0050] Among them, please refer to Figures 5 to 7 , Figure 5This is a schematic diagram of a second structure of the antenna device 100 provided in an embodiment of the present application. Figure 6 for Figure 5 The first current distribution diagram of the antenna device 100 is shown in FIG. Figure 7 for Figure 5 1. The second current distribution diagram of the antenna device 100 shown in FIG. 1 shows that when the antenna device 100 is not provided with the coupling adjustment circuit 140, the signal source 130 can also excite the first radiator 110 and the second radiator 120 to simultaneously generate the first resonant mode and the second resonant mode. Figure 6 As shown, the first resonant current I1 generated by the first resonant mode flows from the first ground end 112 toward the first free end 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120 and flow from the second free end 121 toward the second ground end 122 on the second radiator 120. Since the antenna device 100 is not provided with the coupling amount adjustment circuit 140, the first resonant current I1 cannot flow between the first radiator 110 and the second radiator 120 through the coupling amount adjustment circuit 140, so that Figure 6 In the antenna device 100 shown, in the first resonance mode, the current density of the first resonance current I1 distributed on the first radiator 110 is greater than the current density distributed on the second radiator 120, so that in the first resonance mode, the first radiator 110 acts as a main radiation branch and the second radiator 120 acts as an auxiliary radiation branch to jointly support the transmission and reception of wireless signals. Figure 7 As shown, the second resonant current I2 generated by the second resonant mode flows from the first ground end 112 toward the first free end 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120 and flow from the second ground end 122 toward the second free end 121 on the second radiator 120; since the antenna device 100 is not provided with a coupling amount adjustment circuit 140, the second resonant current I2 cannot flow between the first radiator 110 and the second radiator 120 through the coupling amount adjustment circuit 140, so that Figure 7 In the antenna device 100 shown, in the second resonant mode, the current density of the second resonant current I2 distributed on the second radiator 120 is greater than the current density distributed on the first radiator 110, so that in the second resonant mode, the second radiator 120 acts as the main radiation branch and the first radiator 110 acts as the auxiliary radiation branch to jointly support the transmission and reception of wireless signals.

[0051] Understandably, compared Figure 2 and Figure 6It can be seen that the antenna device 100 of the embodiment of the present application is provided with a coupling adjustment circuit 140, and the first resonant current I1 with a larger current distribution density on the first radiator 110 can flow to the second radiator 120 through the coupling adjustment circuit 140, and the area with the largest current density on the first radiator 110 can be dispersed to other areas (such as other areas of the first radiator 110 or the second radiator 120), and the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is more balanced, and the SAR value generated by the first resonant mode is lower, and the antenna performance of the first resonant mode is better. For example, when the first resonant mode covers the uplink signal of the wireless signal, the uplink transmission performance of the antenna device 100 provided with the coupling adjustment circuit 140 in the present application is better.

[0052] Understandably, compared Figure 3 and Figure 7 It can be seen that the antenna device 100 of the embodiment of the present application is provided with a coupling adjustment circuit 140, and the second resonant current I2 with a larger current distribution density on the second radiator 120 can flow to the first radiator 110 through the coupling adjustment circuit 140, and the area with the largest current density on the second radiator 120 can be dispersed to other areas (such as other areas of the second radiator 120 or the first radiator 110), and the current density of the second resonant current I2 distributed on the first radiator 110 and the second radiator 120 is more balanced, and the SAR value generated by the second resonant mode is lower, and the antenna performance of the second resonant mode is better. For example, when the second resonant mode covers the downlink signal of the wireless signal, the downlink reception performance of the antenna device 100 provided with the coupling adjustment circuit 140 in the present application is better.

[0053] It should be noted that the coupling adjustment circuit 140 does not substantially affect the frequency of the wireless signal supported by the first radiator 110 and the second radiator 120 under the first resonance mode and the second resonance mode. That is, when the coupling adjustment circuit 140 is not provided, the first radiator 110 and the second radiator 120 can support wireless signals in a certain frequency band, such as the medium and high frequency band, under the first resonance mode and the second resonance mode; when the antenna device 100 is provided with the coupling adjustment circuit 140, the first radiator 110 and the second radiator 120 can still support wireless signals in the frequency band, such as the medium and high frequency band, under the first resonance mode and the second resonance mode.

[0054] The antenna device 100 of the embodiment of the present application is provided with a coupling adjustment circuit 140, and the resonant current generated by the excitation signal provided by the signal source 130 can form at least two flow paths between the first radiator 110 and the second radiator 120. The current distribution of the resonant current on the first radiator 110 and the second radiator 120 is more dispersed, and the current density and current intensity on the first radiator 110 and the second radiator 120 are more balanced, which can reduce the SAR value of the antenna device 100, reduce the antenna power back-off value, and improve the antenna performance in the user's actual usage scenario.

[0055] Among them, please refer to Figure 8 , Figure 8 The third structural diagram of the antenna device 100 provided in the embodiment of the present application is as follows: The coupling adjustment circuit 140 may include at least one of a first circuit 141 and a second circuit 142 .

[0056] One end of the first circuit 141 can be directly or indirectly electrically connected between the signal source 130 and the feeding point 113 , and the other end of the first circuit 141 can be directly or indirectly electrically connected to the second radiator 120 . The first circuit 141 can allow the first resonant current I1 to flow between the first radiator 110 and the second radiator 120 along the first circuit 141 .

[0057] One end of the second circuit 142 can be directly or indirectly electrically connected between the signal source 130 and the feeding point 113, and the other end of the second circuit 142 can be directly or indirectly electrically connected to the second radiator 120. The second circuit 142 can make the second resonant current I2 flow between the first radiator 110 and the second radiator 120 along the second circuit 142.

[0058] It can be understood that when the coupling adjustment circuit 140 is not provided, the current density of the first resonant current I1 distributed on the first radiator 110 is greater than the current density distributed on the second radiator 120. The first circuit 141 can allow part of the first resonant current I1 to flow from the first radiator 110 along the first circuit 141 to the second radiator 120, so as to balance the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120. For example, the first circuit 141 can make the current density of the first resonant current I1 on the first radiator 110 and the second radiator 120 equal. It should be noted that the equality here may include approximately equality. In the current simulation diagram, the scheme of the first circuit 141 that makes the current distribution color and / or density of the first radiator 110 similar to the current distribution color and / or density of the second radiator 120 is within the protection scope of the embodiments of the present application.

[0059] It can be understood that when the coupling adjustment circuit 140 is not provided, the current density of the second resonant current I2 distributed on the second radiator 120 is greater than the current density distributed on the first radiator 110. The second circuit 142 can allow part of the second resonant current I2 to flow from the second radiator 120 along the second circuit 142 to the first radiator 110, so as to balance the current density of the second resonant current I2 distributed on the first radiator 110 and the second radiator 120. For example, the second circuit 142 can make the current density of the second resonant current I2 on the first radiator 110 and the second radiator 120 equal. It should be noted that the equality here may include approximately equality. In the current simulation diagram, the second circuit 142 makes the current distribution color and / or density of the first radiator 110 similar to the current distribution color and / or density of the second radiator 120, and the scheme of the second circuit 142 is within the protection scope of the embodiments of the present application.

[0060] It can be understood that when the first radiator 110 and the second radiator 120 generate the first resonance mode but do not generate the second resonance mode, the antenna device 100 or the electronic device can make one end of the first circuit 141 electrically connected between the signal source 130 and the feeding point 113, and the other end of the first circuit 141 is electrically connected to the second radiator 120. The first circuit 141 can make the current density of the first resonance current I1 on the first radiator 110 and the second radiator 120 equal, so that the SAR value in the first resonance mode is lower. At this time, the antenna device 100 can only include the first circuit 141 but not the second circuit 142, or the antenna device 100 also includes the second circuit 142 but the second circuit 142 does not work, for example, the two ends of the second circuit 142 may not be connected to the second radiator 120 and the area between the signal source 130 and the feeding point 113.

[0061] It can be understood that when the first radiator 110 and the second radiator 120 generate the second resonance mode but not the first resonance mode, the antenna device 100 or the electronic device can make one end of the second circuit 142 electrically connected between the signal source 130 and the feeding point 113, and the other end of the second circuit 142 electrically connected to the second radiator 120, and the second circuit 142 can make the current density of the second resonance current I2 on the first radiator 110 and the second radiator 120 equal, so that the SAR value in the second resonance mode is lower. At this time, the antenna device 100 can only include the second circuit 142 but not the first circuit 141, or the antenna device 100 also includes the first circuit 141 but the first circuit 141 does not work, for example, the two ends of the first circuit 141 may not be connected to the second radiator 120 and the area between the signal source 130 and the feeding point 113.

[0062] It can be understood that when the first radiator 110 and the second radiator 120 simultaneously generate the first resonant mode and the second resonant mode, the antenna device 100 or the electronic device can control one of the first circuit 141 and the second circuit 142 to work so as to achieve a resonant current in a resonant mode that is evenly distributed in the two radiators and has a lower SAR value, or the antenna device 100 or the electronic device can control the first circuit 141 and the second circuit 142 to work in a time division multiplexing manner (using different time periods of the same physical connection to transmit different signals) so that the first resonant mode and the second resonant mode can work in time division so that the first resonant mode and the second resonant mode can achieve a lower SAR value in time division.

[0063] It is understandable that if Figure 8 As shown, the coupling adjustment circuit 140 may further include a control switch 143, the input end a1 of the control switch 143 may be electrically connected between the signal source 130 and the feeding point 113, the first output end b1 of the control switch 143 may be electrically connected to the first circuit 141, and the second output end b2 of the control switch 143 may be electrically connected to the second circuit 142. The control switch 143 may control the input end a1 to be conductive with the first output end b1 so that one end of the first circuit 141 may be electrically connected to the signal source 130 and the feeding point 113, and the first circuit 141 may enable the first resonant mode to have a lower SAR value. Alternatively, the control switch 143 may also control the input end a1 to be conductive with the second output end b2 so that one end of the second circuit 142 may be electrically connected to the signal source 130 and the feeding point 113, and the second circuit 142 may enable the second resonant mode to have a lower SAR value.

[0064] It can be understood that when the signal source 130 excites the first radiator 110 and the second radiator 120 to jointly generate the first resonant mode and the second resonant mode, and the center frequency of the wireless signal supported by the first resonant mode is lower than the center frequency of the wireless signal supported by the second resonant mode, the coupling variable generated by the first circuit 141 for the first resonant mode may be different from the coupling variable generated by the second circuit 142 for the second resonant mode. For example, the equivalent capacitance value of the first circuit 141 may be greater than the equivalent capacitance value of the second circuit 142. Under the action of the first circuit 141 with a larger equivalent capacitance value, the current density of the first resonant current I1 of the first resonant mode with a lower center frequency distributed on the first radiator 110 and the second radiator 120 is more evenly distributed; under the action of the second circuit 142 with a smaller equivalent capacitance value, the current density of the second resonant current I2 of the second resonant mode with a higher center frequency distributed on the first radiator 110 and the second radiator 120 is also more evenly distributed. Therefore, when the wireless signals supported by the first resonant mode and the second resonant mode cover a wider frequency band, the coupling adjustment circuit 140 of the embodiment of the present application can make the SAR values ​​of the wireless signals supported by the first radiator 110 and the second radiator 120 smaller in the entire frequency band, which can improve the antenna performance of the antenna device 100 when supporting the wireless signal.

[0065] It can be understood that when the wireless signal supported by the first resonance mode covers the uplink signal frequency band of a certain frequency band, and the wireless signal supported by the second resonance mode covers the downlink signal of the frequency band, considering that the detection of the SAR value generally exists in the scene where the antenna device 100 transmits the signal outward, therefore, in the actual scene, the coupling amount adjustment circuit 140 may include the first circuit 141 but not the second circuit 142. Of course, in other application scenarios, the coupling amount adjustment circuit 140 may also include the second circuit 142, or include the first circuit 141 and the second circuit 142 at the same time. For example, when the wireless signal supported by the first resonance mode and the wireless signal supported by the second resonance mode respectively cover two different frequency band signals, at this time, the coupling amount adjustment circuit 140 may include the first circuit 141 and the second circuit 142 at the same time, and the antenna device 100 or the electronic device may control the first circuit 141 and the second circuit 142 to work in a time-division multiplexing manner, so that the first resonance mode and the second resonance mode can have a lower SAR value in time division. The embodiment of the present application does not limit the specific structure of the coupling amount adjustment circuit 140.

[0066] Please combine Figure 8 Please also refer to Fig. 9 , Fig. 9 This is a fourth structural diagram of the antenna device 100 provided in an embodiment of the present application. The first circuit 141 of the coupling adjustment circuit 140 may include a switch 1411 , a first branch 1412 , and at least one second branch 1413 .

[0067] The switch 1411 may include one or more (a plurality of may be two or more, which will not be described in detail below) input terminals and a plurality of output terminals. One terminal of the switch 1411, for example, the input terminal, may be directly or indirectly electrically connected to the second radiator 120. One terminal of the first branch 1412 may be directly or indirectly electrically connected between the signal source 130 and the feeding point 113, and the other terminal of the first branch 1412 may be directly or indirectly electrically connected between the switch 1411 (for example, the input terminal of the switch 1411) and the second radiator 120. The first branch 1412 may form a current path between the signal source 130 and the second radiator 120. One terminal of each second branch 1413 may be directly or indirectly electrically connected between the signal source 130 and the feeding point 113, and the other terminal of each second branch 1413 may be directly or indirectly electrically connected to an output terminal of the switch 1411.

[0068] It can be understood that the first branch 1412 and at least one second branch 1413 can be, but are not limited to, matching circuit structures, and the switch 1411 can switch between different matching circuit structures. The first branch 1412 and at least one second branch 1413 can be, but are not limited to, including capacitor elements. For example, the first branch 1412 may include a first capacitor, and the second branch 1413 may include a second capacitor. Of course, the first branch 1412 and the second branch 1413 can also be other structures, such as, but not limited to, the first branch 1412 and the second branch 1413 are wire structures. This embodiment of the present application does not limit this.

[0069] It can be understood that the switch 1411 can conduct the electrical connection between the other end of at least one second branch 1413 and the second radiator 120, so as to form at least one current path through the switch 1411 between the signal source 130 and the second radiator 120. Of course, the switch 1411 can also disconnect the electrical connection between the other end of at least one second branch 1413 and the second radiator 120, so that the current path between the signal source 130 and the second radiator 120 through the switch 1411 is disconnected.

[0070] It can be understood that the switching switch 1411 can be, but is not limited to, a single-pole multi-throw switch, a multi-pole multi-throw switch, a plurality of single-pole single-throw switches, etc. The embodiment of the present application does not limit the specific structure of the switching switch 1411.

[0071] It can be understood that no matter whether the switch 1411 is in the on state or the off state, the first branch 1412 can be in a state of being electrically connected to the signal source 130 and the second radiator 120, and the first circuit 141 can increase the coupling amount between the first radiator 110 and the second radiator 120 through the first branch 1412. When the switch 1411 is switched between the on state and the off state, the first circuit 141 can further adjust the coupling amount between the first radiator 110 and the second radiator 120 by controlling the state of the second branch 1413.

[0072] It can be understood that when the frequencies of the wireless signals jointly supported by the first radiator 110 and the second radiator 120 are different, the current distribution of the first resonant current I1 on the first radiator 110 and the second radiator 120 will also be different, and the SAR values ​​generated by the first radiator 110 and the second radiator 120 will also be different. In order to obtain the optimal SAR value (that is, the lowest SAR value at this frequency), the switching switch 1411 has different switching states, and the coupling amount of the first radiator 110 and the second radiator 120 is adjusted by selecting the conduction state of at least one second branch 1413, so that under the adjustment of the first circuit 141, the coupling amount of the first radiator 110 and the second radiator 120 at the current frequency is in the optimal range, and the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is more balanced, so that the antenna device 100 can have a lower SAR value at this frequency.

[0073] The first circuit 141 of the coupling adjustment circuit 140 of the embodiment of the present application includes a first branch 1412 and at least one second branch 1413. The first branch 1412 can be in a state of being electrically connected to the signal source 130 and the second radiator 120. The second branch 1413 can be connected or disconnected from the electrical connection with the second radiator 120 under the control of the switching switch 1411. Therefore, the first circuit 141 of the embodiment of the present application can adjust the antenna device 100 to different coupling amounts, and can ensure that the antenna device 100 can have a lower SAR value in each frequency band.

[0074] Please combine Figure 8 Please also refer to Fig.10 , Fig.10 A fifth structural diagram of the antenna device 100 provided in an embodiment of the present application: The first circuit 141 of the coupling adjustment circuit 140 may include a switch 1411 and a plurality of second branches 1413 but does not include the first branch 1412 .

[0075] The switch 1411 may include one or more input terminals and multiple output terminals, and one terminal of the switch 1411, for example, the input terminal, may be directly or indirectly electrically connected to the second radiator 120. One terminal of each second branch 1413 may be directly or indirectly electrically connected between the signal source 130 and the feeding point 113, and the other terminal of each second branch 1413 may be directly or indirectly electrically connected to an output terminal of the switch 1411. The switch 1411 is used to turn on or off the electrical connection between the other terminal of at least one second branch 1413 and the second radiator 120.

[0076] It can be understood that the equivalent capacitance values ​​of multiple second branches 1413 may be different, and the switching switch 1411 can select different second branches 1413 to be connected or disconnected with the second radiator 120, so that the first circuit 141 can produce different coupling amounts to the first radiator 110 and the second radiator 120, so that under the regulation of the first circuit 141, the coupling amount of the first radiator 110 and the second radiator 120 at the current frequency is in the optimal range, and the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is more evenly distributed, so that the antenna device 100 can have a lower SAR value performance at this frequency.

[0077] It should be noted that the above is only an exemplary description of the structure of the first circuit 141 of the embodiment of the present application, and the first circuit 141 may also have other structures, for example, but not limited to, the first circuit 141 may not include the switch 1411, and the first branch 1412 and at least one second branch 1413 are circuit structures that are turned on or off by adjusting parameters. The embodiment of the present application does not limit the specific structure of the first circuit 141.

[0078] Among them, please refer to Fig.11 , Fig.11 This is a sixth structural diagram of the antenna device 100 provided in an embodiment of the present application. The antenna device 100 may further include a first switching circuit 160. The first circuit 141 may share part of the structure with the first switching circuit 160.

[0079] One end of the first switching circuit 160 is directly or indirectly electrically connected to the second radiator 120, and the other end of the first switching circuit 160 is electrically connected to the ground system 150 to achieve grounding. Under the action of the first switching circuit 160, the signal source 130 can stimulate the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0080] like Fig.11As shown, the first switching circuit 160 may include a switching switch 1411 of the first circuit 141 and at least one switching branch 161, one end (for example, an input end) of the switching switch 1411 may be electrically connected to the second radiator 120, one end of each switching branch 161 may be electrically connected to the switching switch 1411 (for example, an output end of the switching switch 1411), and the other end of each switching branch 161 may be electrically connected to the ground system 150 to achieve grounding.

[0081] It can be understood that the switching switch 1411 may include multiple output terminals, for example, may include one or more first output terminals and one or more second output terminals, each second branch 1413 may be electrically connected to a first output terminal, and each switching branch 161 may be electrically connected to a second output terminal, so that part of the first circuit 141 can be integrated into the first switching circuit 160, the first circuit 141 and the first switching circuit 160 can share part of the structure, which can further simplify the structure of the antenna device 100.

[0082] It can be understood that the multiple switching branches 161 can be, but are not limited to, matching circuit structures, and the inductive and capacitive load values ​​of the multiple switching branches 161 can be different, so that when the switching switch 1411 selects to turn on different switching branches 161, the first radiator 110 and the second radiator 120 can have different electrical lengths and can support wireless signals of different frequency bands. The so-called electrical length refers to the equivalent length of the radiating structure when radiating a signal, or the equivalent length required for electromagnetic wave transmission in the radiating structure. The electrical length of the radiating structure can be greater than, less than or equal to its branch length. The electrical length of the radiating structure can be associated with the frequency supported by the radiating structure. When the electrical length of the radiating structure is longer, the radiating structure can support wireless signals with lower frequencies; when the electrical length of the radiating structure is shorter, the radiating structure can support wireless signals with higher frequencies. The radiating structure can change its electrical length by electrically connecting circuits with different impedances.

[0083] It is understandable that the switch 1411 can switch on or off the electrical connection between at least one switch branch 161 and the second radiator 120 , so that the signal source 130 can stimulate the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0084] It can be understood that the switching switch 1411 can also adaptively choose to turn on or off the electrical connection between the other end of at least one second branch 1413 and the second radiator 120 according to the frequency band of the wireless signal supported by the first radiator 110 and the second radiator 120, so that when the first radiator 110 and the second radiator 120 operate in different frequency bands, the first circuit 141 can make the coupling amount of the first radiator 110 and the second radiator 120 be in the optimal range, the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is basically equal, and the first radiator 110 and the second radiator 120 supporting different frequency bands can have the best coupling amount.

[0085] Exemplarily, when the switching switch 1411 selects to turn on at least one switching branch 161 to electrically connect with the second radiator 120 so that the first radiator 110 and the second radiator 120 support wireless signals of the first frequency band, the switching switch 1411 can also turn on the electrical connection between the other end of at least one second branch 1413 and the second radiator 120 so that the first circuit 141 has a first equivalent capacitance value. At this time, under the regulation of the first circuit 141, the first radiator 110 and the second radiator 120 have a better coupling amount, and the SAR value of the first radiator 110 and the second radiator 120 when supporting the wireless signals of the first frequency band is also lower. When the switching switch 1411 chooses to turn on at least another switching branch 161 to electrically connect with the second radiator 120 so that the first radiator 110 and the second radiator 120 support wireless signals of the second frequency band, the switching switch 1411 can also turn on the electrical connection between the other end of at least another second branch 1413 and the second radiator 120 so that the first circuit 141 has a second equivalent capacitance value. At this time, under the regulation of the first circuit 141, the first radiator 110 and the second radiator 120 also have a better coupling amount, and the SAR value of the first radiator 110 and the second radiator 120 when supporting wireless signals of the second frequency band is also lower.

[0086] It can be understood that when the first frequency band supported by the first radiator 110 and the second radiator 120 is higher than the second frequency band, the switching switch 1411 can switch between different second branches 1413, so that the first equivalent capacitance value of the first circuit 141 when supporting the first frequency band wireless signal is smaller than the second equivalent capacitance value when supporting the second frequency band wireless signal. For example, when the first radiator 110 and the second radiator 120 support wireless signals in the B1 frequency band (1920MHz-2170MHz) or the B3 frequency band (1710MHz-1880MHz), the switching switch 1411 turns on at least one second branch 1413 so that the first equivalent capacitance value of the first circuit 141 can be 0.5pF (picofarad); when the first radiator 110 and the second radiator 120 support wireless signals in the higher frequency B41 frequency band (2496MHz-2690MHz), the switching switch 1411 turns on at least another second branch 1413 so that the second equivalent capacitance value of the first circuit 141 can be 0.3pF.

[0087] The first switching circuit 160 and the first circuit 141 of the embodiment of the present application reuse the switching switch 1411, and part of the structure of the first circuit 141 can be integrated in the first switching circuit 160, which can simplify the structure of the antenna device 100 and realize the miniaturized design of the antenna device 100; at the same time, the switching switch 1411 can adaptively choose to turn on or off the electrical connection between the other end of at least one second branch 1413 and the second radiator 120 according to the frequency band of the wireless signal supported by the first radiator 110 and the second radiator 120, thereby ensuring that the antenna device 100 can obtain a lower SAR value in each frequency band.

[0088] It should be noted that the first switching circuit 160 of the embodiment of the present application may not reuse the switch 1411 with the first circuit 141, that is, the first switching circuit and the first circuit 141 may be independent structures. Fig.12 , Fig.12 This is a seventh structural diagram of the antenna device 100 provided in an embodiment of the present application. The first switching circuit 160 and the first circuit 141 can be electrically connected to different areas of the second radiator 120. The first switching circuit 160 and the first circuit 141 can be independent of each other without reusing any structure. The embodiment of the present application does not limit the specific structures of the first switching circuit 160 and the first circuit 141.

[0089] It should be noted that the second circuit 142 of the coupling adjustment circuit 140 may also include a switch, a first branch, and at least one second branch like the first circuit 141; the second circuit 142 may also reuse part of the structure with the first switching circuit 160 like the first circuit 141 or be separated from the first switching circuit 160. Of course, the second circuit 142 may further reuse part of the structure with the first circuit 141 and the first switching circuit 160 to further simplify the structure of the antenna device 100. For example, please refer to Fig.13 , Fig.13 The eighth structural diagram of the antenna device 100 provided in the embodiment of the present application is as follows: The first switching circuit 160 may include a switch 1411 , at least one switching branch 161 , a first branch 1412 , at least one second branch 1413 and at least one third branch 162 .

[0090] One end of the switching switch 1411, for example, the input end, can be electrically connected to the second radiator 120, one end of each switching branch 161 can be electrically connected to an output end of the switching switch 1411, and the other end of each second branch 1413 can be grounded; one end of the first branch 1412 can be electrically connected between the signal source 130 and the first radiator 110, and the other end of the first branch 1412 can be electrically connected between the switching switch 1411 and the second radiator 120; one end of each second branch 1413 can be electrically connected between the signal source 130 and the first radiator 110, and the other end of each second branch 1413 can be electrically connected to an output end of the switching switch 1411; one end of each third branch 162 can be electrically connected between the signal source 130 and the first radiator 110, and the other end of each third branch 162 can be electrically connected to an output end of the switching switch 1411.

[0091] It is understandable that the switch 1411 can switch on or off the electrical connection between at least one switch branch 161 and the second radiator 120 , so that the signal source 130 can stimulate the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0092] It can be understood that the switching switch 1411 can also adaptively choose to turn on or off the electrical connection between the other end of at least one second branch 1413 and the second radiator 120 according to the frequency band of the wireless signal supported by the first radiator 110 and the second radiator 120. The first circuit 141 can adjust the coupling amount between the first radiator 110 and the second radiator 120 through at least one second branch 1413 and the first branch 1412. When the first radiator 110 and the second radiator 120 operate in different frequency bands, the first circuit 141 can make the coupling amount between the first radiator 110 and the second radiator 120 within the optimal range, and the current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is basically equal, and the first radiator 110 and the second radiator 120 supporting different frequency bands can have the optimal coupling amount.

[0093] It can be understood that the switching switch 1411 can also adaptively select to turn on or off the electrical connection between the other end of at least one third branch 162 and the second radiator 120 according to the frequency band of the wireless signal supported by the first radiator 110 and the second radiator 120. The first circuit 141 can adjust the coupling amount between the first radiator 110 and the second radiator 120 through at least one third branch 162 and the first branch 1412. When the first radiator 110 and the second radiator 120 operate in different frequency bands, the first circuit 141 can make the coupling amount between the first radiator 110 and the second radiator 120 within the optimal range, and the current density of the second resonant current I2 distributed on the first radiator 110 and the second radiator 120 is basically equal. The first radiator 110 and the second radiator 120 supporting different frequency bands can also have the optimal coupling amount.

[0094] It is understandable that the first branch 1412, the second branch 1413, and the third branch 162 may be, but are not limited to, matching circuit structures. For example, the first branch 1412, the second branch 1413, and the third branch 162 may be capacitors with different capacitance values, so that when the switching circuit switches between different branches, the first radiator 110 and the second radiator 120 may have different coupling amounts.

[0095] In the embodiment of the present application, the first circuit 141 and the second circuit 142 of the coupling adjustment circuit 140 are integrated into the first switching circuit 160 , which can further improve the integration of the antenna device 100 , so that the antenna device 100 can be further miniaturized.

[0096] It should be noted that the above is only an exemplary description of the structure of the first circuit 141, the second circuit 142, and the first switching circuit 160 of the coupling amount adjustment circuit 140 of the embodiment of the present application. The first circuit 141, the second circuit 142, and the first switching circuit 160 of the embodiment of the present application can also be other structures, and the embodiment of the present application is not limited to this.

[0097] Please combine Figures 1 to 13 Please refer to Fig.14 , Fig.14 This is a ninth structural diagram of the antenna device 100 provided in an embodiment of the present application. The antenna device 100 may further include a second switching circuit 170 .

[0098] One end of the second switching circuit 170 can be directly or indirectly electrically connected to the first radiator 110, and the other end of the second switching circuit 170 can be electrically connected to the ground system 150 to achieve grounding. Under the action of the second switching circuit 170, the signal source 130 is used to stimulate the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0099] It is understandable that the second switching circuit 170 may include a switch element and multiple (two or more) switching branches, and the switch element may turn on or off the electrical connection between one end of at least one switching branch and the first radiator 110. Each switching branch may include, but is not limited to, any combination of components such as capacitors and resistors. The specific structure of the second switching circuit 170 is not limited in the embodiment of the present application.

[0100] It is understandable that the antenna device 100 may include the first switching circuit 160 but not the second switching circuit 170; the antenna device 100 may also include the second switching circuit 170 but not the first switching circuit 160; the antenna device 100 may also include the first switching circuit 160 and the second switching circuit 170 at the same time. In this case, under the joint action of the first switching circuit 160 and the second switching circuit 170, the signal source 130 may excite the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands. For example, the first radiator 110 and the second radiator 120 may, but are not limited to, cover the medium and high frequency bands. This embodiment of the present application is not limited to this.

[0101] The antenna device 100 of the embodiment of the present application includes a first switching circuit 160 and a second switching circuit 170. Under the action of the two switching circuits, the first radiator 110 and the second radiator 120 can support wireless signals of more frequency bands. The antenna device 100 covers a wider frequency band and the antenna device 100 is applicable to a wider range of scenarios.

[0102] Based on the structure of the antenna device 100, the embodiment of the present application further provides an electronic device 10, which may be a smart phone, a tablet computer, or a gaming device, an augmented reality (AR) device, an automotive device, a data storage device, an audio player, a video player, a laptop, a desktop computing device, etc. Please refer to Fig.15 , Fig.15 The first structural diagram of the electronic device 10 provided in the embodiment of the present application. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Fig.15 As shown, the antenna device 100 may further include a display screen 200 , a middle frame 300 , a circuit board 400 , a battery 500 , and a rear cover 600 .

[0103] The display screen 200 is disposed on the middle frame 300 to form a display surface of the antenna device 100 for displaying information such as images and texts. The display screen 200 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display.

[0104] The middle frame 300 may include a frame 310 and a middle plate 320. The frame 310 may be a hollow frame structure and form the outer frame of the antenna device 100. The middle plate 320 may be a thin plate or sheet-like structure. The middle frame 300 is used to provide support for the electronic devices or functional components in the antenna device 100 so as to install the electronic devices and functional components of the antenna device 100 together. For example, grooves, protrusions, through holes and other structures may be provided on the middle frame 300 to facilitate the installation of the electronic devices or functional components of the antenna device 100. It can be understood that the material of the middle frame 300 may include metal or plastic.

[0105] The circuit board 400 is arranged on the middle frame 300 for fixing, and the circuit board 400 is sealed inside the antenna device 100 through the rear shell 600. A processor may be integrated on the circuit board 400, and one or more functional components such as an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated. At the same time, the display screen 200 may be electrically connected to the circuit board 400 so that the display of the display screen 200 is controlled by the processor on the circuit board 400.

[0106] The battery 500 is disposed on the middle frame 300, and the battery 500 is sealed inside the antenna device 100 through the rear shell 600. At the same time, the battery 500 is electrically connected to the circuit board 400 so that the battery 500 can power the antenna device 100. Among them, a power management circuit may be disposed on the circuit board 400. The power management circuit is used to distribute the voltage provided by the battery 500 to various electronic devices in the antenna device 100.

[0107] The rear shell 600 is connected to the middle frame 300. For example, the rear shell 600 can be attached to the middle frame 300 by an adhesive such as a double-sided tape to achieve connection with the middle frame 300. The rear shell 600 is used to seal the electronic devices and functional components of the antenna device 100 inside the antenna device 100 together with the middle frame 300 and the display screen 200 to protect the electronic devices and functional components of the antenna device 100.

[0108] It is understandable that the first radiator 110 and the second radiator 120 of the embodiment of the present application can be formed on the frame 310 to form a frame antenna structure. Fig.16 , Fig.16 A second structural schematic diagram of the electronic device 10 provided in an embodiment of the present application. The first metal branch 301 and the second metal branch 302 may be formed on the frame 310 by slits, the first radiator 110 may include the first metal branch 301, and the second radiator 120 may include the second metal branch 302. In this case, the first radiator 110 and the second radiator 120 may reuse the conductor structure on the frame 310, and the frame 310 is reused, which can further realize the miniaturization design of the antenna device 100.

[0109] It should be noted that the first radiator 110 and the second radiator 120 of the embodiment of the present application can also be formed or set on other structures of the electronic device 10. For example, the two radiators can be set on structures such as the circuit board 400 and the antenna bracket. The embodiment of the present application is not limited to this.

[0110] It is understandable that the ground system 150 of the embodiment of the present application can be formed on the rear housing 600, the circuit board 400 or the middle plate 320 of the middle frame 300, and a conductor area with zero potential can be provided on the rear housing 600, the circuit board 400 or the middle plate 320, and the ground system 150 can be provided on the conductor area. Fig.16 As shown, the middle plate 320 may be provided with a ground system 150, and the middle plate 320 may be reused as the ground system 150. At this time, the first grounding terminal 112 of the first radiator 110 and the second grounding terminal 122 of the second radiator 120 may be electrically connected to the ground system 150 through structures such as, but not limited to, grounding springs, grounding pins, and grounding pads to achieve grounding.

[0111] It can be understood that one or more of the signal source 130, the coupling adjustment circuit 140, the first switching circuit 160, and the second switching circuit 170 of the embodiment of the present application can be, but is not limited to, arranged on the circuit board 400; of course, one or more of the above components can also be arranged on the small board of the antenna device 100, and the embodiment of the present application does not limit the specific setting position of the above structure.

[0112] It can be understood that the above is only an illustrative example of the antenna device 100. The antenna device 100 of the embodiment of the present application may also include components such as a camera, a sensor, and an acoustic-to-electric conversion device. These components can be found in the description of the relevant technology and will not be repeated here.

[0113] It should be noted that the antenna solution of the present application is not only applicable to electronic devices 10 such as mobile phones, but can also be applied to large-screen electronic devices 10 such as tablet circuits, PCs, etc.; at the same time, the antenna implementation form of the present application is not limited to the metal frame 310 form, and the embodiments of the present application do not limit this.

[0114] The antenna device 100 and the electronic device 10 of the embodiment of the present application are provided with a coupling adjustment circuit 140, which can adjust the coupling amount of the first radiator 110 and the second radiator 120, so that the same-direction current on the first radiator 110 and the second radiator 120 in the first resonance mode is more balanced, and the reverse current on the first radiator 110 and the second radiator 120 in the second resonance mode is more balanced, which can reduce the SAR value of the first resonance mode and the second resonance mode, and can improve the antenna performance in the actual user usage scenario. In addition, the first switching circuit 160 and the second switching circuit 170 are respectively provided on the first radiator 110 and the second radiator 120, which can realize the switching of different frequency bands. When the first switching circuit 160 is a multi-way switch, one or more of which are used as switching branches, and another one or more of which are multiplexed as the coupling adjustment circuit 140, when the first radiator 110 and the second radiator 120 operate in different frequency bands, in order to have a lower SAR value, the first switching circuit 160, the second switching circuit 170, and the coupling adjustment circuit 140 (the first circuit 141, the second circuit 142) can select appropriate branches, so that the first radiator 110 and the second radiator 120 can obtain the best coupling amount in different frequency bands, thereby ensuring that the antenna device 100 and the electronic device 10 obtain a lower SAR value in each frequency band.

[0115] It should be understood that, in the description of this application, terms such as "first", "second", etc. are only used to distinguish similar objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0116] The antenna device and electronic device provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: include: A first radiator comprises a first free end, a feeding point and a first grounding end, wherein the first grounding end is grounded; A signal source, electrically connected to the feeding point; A second radiator, comprising a second free end and a second ground end, wherein a coupling gap is formed between the second free end and the first free end, and the second ground end extends in a direction away from the first radiator and is grounded; A coupling adjustment circuit, one end of which is electrically connected between the signal source and the feeding point, and the other end of which is electrically connected to the second radiator; wherein, The signal source is used to excite the first radiator and the second radiator to jointly generate a resonant mode and support the transmission and reception of wireless signals. Part of the resonant current formed by the resonant mode is electromagnetically coupled to the second radiator through the coupling gap, and another part of the resonant current flows between the first radiator and the second radiator through the coupling amount adjustment circuit.

2. The antenna device according to claim 1, characterized in that The signal source is used to excite the first radiator and the second radiator to jointly generate at least one of a first resonance mode and a second resonance mode; A first resonant current formed by the first resonant mode flows from the first ground end toward the first free end on the first radiator, and flows from the second free end toward the second ground end on the second radiator; The second resonant current formed by the second resonant mode flows from the first ground end toward the first free end on the first radiator, and flows from the second ground end toward the second free end on the second radiator.

3. The antenna device according to claim 2, characterized in that When the signal source excites the first radiator and the second radiator to jointly generate the first resonant mode, the coupling amount adjustment circuit is used to make the current density of the first resonant current on the first radiator and the second radiator equal.

4. The antenna device according to claim 3, characterized in that: The coupling amount adjustment circuit comprises: A first circuit, one end of the first circuit is electrically connected between the signal source and the feeding point, the other end of the first circuit is electrically connected to the second radiator, and the first circuit is used to make the first resonant current flow along the first circuit between the first radiator and the second radiator.

5. The antenna device according to claim 4, characterized in that: The first circuit comprises: a switching switch, one end of which is electrically connected to the second radiator; a first branch, one end of which is electrically connected between the signal source and the feeding point, and the other end of which is electrically connected between the switch and the second radiator; and At least one second branch, one end of each of the second branches is electrically connected between the signal source and the feeding point, and the other end of each of the second branches is electrically connected to the switch; The switch is used to switch on or off the electrical connection between the other end of at least one of the second branches and the second radiator.

6. The antenna device according to claim 4, characterized in that: The first circuit comprises: a switching switch, one end of which is electrically connected to the second radiator; and A plurality of second branches, one end of each of the second branches is electrically connected between the signal source and the feeding point, and the other end of each of the second branches is electrically connected to the switch; The switch is used to switch on or off the electrical connection between the other end of at least one of the second branches and the second radiator.

7. The antenna device according to claim 5 or 6, characterized in that: The antenna device further comprises: The first switching circuit includes the switching switch and at least one switching branch, one end of each switching branch is used to be electrically connected to the switching switch, and the other end is grounded; wherein, The switch is used to switch on or off the electrical connection between at least one of the switch branches and the second radiator, so that the signal source excites the first radiator and the second radiator to jointly support wireless signals of different frequency bands; The switch is further used to adaptively select to turn on or off the electrical connection between the other end of at least one of the second branches and the second radiator according to the frequency band of the wireless signal supported by the first radiator and the second radiator.

8. The antenna device according to any one of claims 4 to 6, characterized in that: When the first resonance mode supports wireless signals of a first frequency band, the first circuit has a first equivalent capacitance value; when the first resonance mode supports wireless signals of a second frequency band, the first circuit has a second equivalent capacitance value; The first frequency band is higher than the second frequency band, and the first equivalent capacitance value is smaller than the second equivalent capacitance value.

9. The antenna device according to any one of claims 4 to 6, characterized in that: When the signal source excites the first radiator and the second radiator to jointly generate the first resonant mode and the second resonant mode, the coupling adjustment circuit further includes: a control switch, comprising an input terminal, a first output terminal and a second output terminal, wherein the input terminal is electrically connected between the signal source and the feeding point, and the first output terminal is electrically connected to one end of the first circuit; and a second circuit, one end of the second circuit is electrically connected to the second output end, and the other end of the second circuit is electrically connected to the second radiator; wherein, The control switch is used to control the input end and the first output end to be turned on, and the first circuit is used to make the first resonant current flow between the first radiator and the second radiator along the first circuit; or, The control switch is used to control the input end and the second output end to be turned on, and the second circuit is used to make the second resonant current flow between the first radiator and the second radiator along the second circuit.

10. The antenna device according to claim 9, characterized in that: A frequency band of wireless signals supported by the first resonance mode is lower than a frequency band of wireless signals supported by the second resonance mode, and an equivalent capacitance value of the first circuit is greater than an equivalent capacitance value of the second circuit.

11. The antenna device according to any one of claims 1 to 6, characterized in that: The antenna device further comprises: a first switching circuit, wherein one end of the first switching circuit is electrically connected to the second radiator and the other end is grounded; under the action of the first switching circuit, the signal source is used to stimulate the first radiator and the second radiator to jointly support wireless signals of different frequency bands; and / or, A second switching circuit, one end of the second switching circuit is electrically connected to the first radiator and the other end is grounded; under the action of the second switching circuit, the signal source is used to stimulate the first radiator and the second radiator to jointly support wireless signals of different frequency bands.

12. An electronic device, characterized in that: The invention comprises the antenna device according to any one of claims 1 to 11.

13. The electronic device according to claim 12, characterized in that: The electronic device further comprises a frame and a middle plate, the middle plate is provided with a ground system, the first ground terminal and the second ground terminal are electrically connected to the ground system to achieve grounding; The frame is provided with a first metal branch and a second metal branch by opening a slit, the first radiator includes the first metal branch, and the second radiator includes the second metal branch.

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