Antenna devices and electronic equipment

Abstract

This application provides an antenna device and electronic device. A coupling gap is formed between the first free end of a first radiator and the second free end of a second radiator in the antenna device. The first grounding end of the first radiator and the second grounding end of the second radiator are far apart and grounded. One end of a coupling adjustment circuit is electrically connected between a signal source and a feed point, and the other end is electrically connected to the second radiator. The signal source excites the first and second radiators to jointly generate a resonant mode and support the transmission and reception of wireless signals. Part of the resonant current generated 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 and second radiators through the coupling adjustment circuit. Based on this, the resonant current can form two current paths between the first and second radiators through the coupling gap and the coupling adjustment circuit, resulting in a more dispersed resonant current between the first and second radiators and a lower SAR value for the antenna device.

Description

Technical Field

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

[0002] With the development of communication technology, antenna devices and electronic devices such as smartphones are able to perform 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 antenna devices and electronic devices on the human body. The higher 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 1.6 W / kg. Antenna devices and electronic equipment in related technologies are often designed with a power back-off mechanism. When the SAR value of the antenna is detected to be too high, the antenna's transmission power is reduced to lower the SAR value. However, the back-off operation will seriously affect the antenna's radiation performance. Therefore, there is an urgent need to provide an antenna design scheme with a low SAR value and superior radiation performance. Summary of the Invention

[0004] This application provides an antenna device and electronic device that can have a low SAR value and superior radiation performance when supporting wireless signals.

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

[0006] The first radiator includes a first free end, a feed point, and a first grounding end, wherein the first grounding end is grounded;

[0007] The signal source is electrically connected to the feed point;

[0008] The second radiator includes 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 is provided, one end of which is electrically connected between the signal source and the feed 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 adjustment circuit.

[0011] Secondly, this application also provides an electronic device, including the antenna device described above.

[0012] The antenna device and electronic equipment of this application form a coupling gap between the first free end of the first radiator and the second free end of the second radiator. The first grounding end of the first radiator and the second grounding end of the second radiator are far apart from each other and grounded. The first radiator and the second radiator can form a port-to-port antenna radiation structure. At the same time, one end of the coupling adjustment circuit is electrically connected between the signal source and the feed point of the first radiator, and the other end of the coupling 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 adjustment circuit. Thus, 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 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. This can reduce the SAR value of the antenna device, reduce the antenna power back-off value, and improve the antenna performance in actual user scenarios. Attached Figure Description

[0013] 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.

[0014] Figure 1 This is a schematic diagram of a first structure of the antenna device provided in an embodiment of this application.

[0015] Figure 2 for Figure 1 The diagram shows the first type of current distribution for the antenna device.

[0016] Figure 3 for Figure 1 The diagram shows a second type of current distribution for the antenna device.

[0017] Figure 4 for Figure 1The diagram shows a schematic of an S11 parameter curve for the antenna device.

[0018] Figure 5 This is a schematic diagram of a second structure of the antenna device provided in an embodiment of this application.

[0019] Figure 6 for Figure 5 The diagram shows the first type of current distribution for the antenna device.

[0020] Figure 7 for Figure 5 The diagram shows a second type of current distribution for the antenna device.

[0021] Figure 8 This is a schematic diagram of a third structure of the antenna device provided in the embodiments of this application.

[0022] Figure 9 This is a schematic diagram of a fourth structure of the antenna device provided in the embodiments of this application.

[0023] Figure 10 This is a fifth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0024] Figure 11 This is a sixth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0025] Figure 12 This is a seventh structural schematic diagram of the antenna device provided in the embodiments of this application.

[0026] Figure 13 This is an eighth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0027] Figure 14 This is a ninth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0028] Figure 15 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0029] Figure 16 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0030] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 16 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.

[0031] This application provides an antenna device and an electronic device. The antenna device can realize wireless communication functions. For example, the antenna device can transmit, but is not limited to, 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 Wide Band (UWB) signals, etc.

[0032] Please refer to the following: Figure 1 , Figure 1 This is a schematic diagram of a first structure of the antenna device 100 provided in the embodiments of this 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 ground end 112. The first ground end 112 can be electrically connected to the ground system 150 to achieve grounding. The first free end 111 can be the end or an open-circuit end of the first radiator 110. The first radiator 110 may also include a feed point 113, which can be disposed between the first free end 111 and the first ground end 112, or the feed point 113 can be disposed at the first free end 111 such that the first free end 111 is the feed end of the first radiator 110. A signal source 130 can be directly or indirectly electrically connected to the feed point 113, and 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 an open-circuit end of the second radiator 120. The second ground end 122 extends 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 feed point 113, and the other end of the coupling adjustment circuit 140 can be directly or indirectly electrically connected to the second radiator 120. 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 described in detail below). Part of the resonant current formed by this 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 understood that electromagnetic coupling, also known as capacitive coupling, refers to the ability of a signal on one radiator to be transmitted to the other radiator through an electric field generated between two radiators, enabling electrical signal conduction even when the two radiators are not in direct contact or directly connected. In the embodiments of this application, a portion of the resonant current generated by the signal source 130 can be capacitively coupled between the first radiator 110 and the second radiator 120.

[0035] It is understood that both the first radiator 110 and the second radiator 120 can be radiating devices with a conductive structure. The first radiator 110 and the second radiator 120 can be, but are not limited to, straight strips, bent shapes, or other shapes, and the extending directions of the first radiator 110 and the second radiator 120 can be the same or different. The embodiments of this application do not limit the specific shape of the first radiator 110 and the second radiator 120.

[0036] It is understood that the ground system 150 can form a common ground for the antenna device 100 or electronic device. The ground system 150 can be a plane or structure with zero potential. For example, the ground system 150 can be formed through conductors, printed circuits, or metal printed layers in the antenna device 100 or electronic device; for another example, the ground system 150 can be formed on the motherboard, small board, or other carrier board of the electronic device; for yet another example, the ground system 150 can also be formed on the frame of the electronic device (e.g., the middle board 320 mentioned later). The specific location of the ground system 150 is not limited in the embodiments of this application.

[0037] Understandably, signal source 130 can provide an excitation signal. Signal source 130 can convert high-frequency excitation signals or confined electromagnetic waves 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 confine electromagnetic waves in free space and transmit them to 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 is understood that the coupling adjustment circuit 140 can be, but is not limited to, a circuit structure consisting of components such as capacitors, inductors, and switches. For example, the coupling adjustment circuit 140 can be a capacitive load circuit. A capacitive load circuit refers to a load with a capacitance parameter. A capacitive load circuit can be a structure that allows the load current to exceed the phase difference characteristic of its load circuit. A capacitive load circuit can be, but is not limited to, a structure comprising one or more capacitor elements connected in series and in parallel to ground. The coupling adjustment circuit 140 allows the excitation signal provided by the signal source 130 to be coupled to the second radiator 120, so that the coupling adjustment circuit 140 can adjust the coupling degree between the first radiator 110 and the second radiator 120.

[0039] It is understandable that when the antenna device 100 is not equipped with the 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. 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. This is not only detrimental to the user's health, but may also trigger the power back-off mechanism and affect the radiation performance of the antenna device 100.

[0040] The antenna device 100 of this application embodiment is provided with a coupling adjustment circuit 140. One end of the coupling adjustment circuit 140 is electrically connected between the signal source 130 and the feed 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. Thus, 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. This can reduce the SAR value of the antenna device 100, reduce the antenna power back-off value, and improve the antenna performance in actual user scenarios.

[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 resonant mode and the second resonant mode. Under the action of at least one resonant mode, the first radiator 110 and the second radiator 120 can support the transmission and reception of wireless signals.

[0042] It is understandable that the signal source 130 can excite the first radiator 110 and the second radiator 120 to generate a first resonant mode that can form a first resonant current I1, such as... Figure 2 As shown, Figure 2 for Figure 1The diagram shows a first current distribution of the antenna device 100. The first resonant current I1 flows from the first ground terminal 112 toward the first free terminal 111 on the first radiator 110, and is electromagnetically coupled to the second radiator 120, flowing from the second free terminal 121 toward the second ground terminal 122 on the second radiator 120, forming a first current path. The first resonant current I1 flows in the same direction on the first radiator 110 and the second radiator 120, and the first resonant mode can excite the first radiator 110 and the second radiator 120 to produce a current distribution in the same direction. Since one end of the coupling adjustment circuit 140 is electrically connected between the signal source 130 and the feed 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 relatively 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 the SAR value generated by the first resonant mode is low, and the first resonant mode can have better antenna performance.

[0043] It is understandable that the signal source 130 can excite the first radiator 110 and the second radiator 120 to generate a second resonant mode, which can form a second resonant current I2, such as... Figure 3 As shown, Figure 3 for Figure 1The diagram illustrates a second current distribution in the antenna device 100. The second resonant current I2 can flow from the first ground terminal 112 toward the first free terminal 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120, flowing from the second ground terminal 122 toward the second free terminal 121 on the second radiator 120, forming 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 produce opposite current distributions. Since one end of the coupling adjustment circuit 140 is electrically connected between the signal source 130 and the feed 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 relatively 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 the SAR value generated by the second resonant mode is lower, and the second resonant mode can have better antenna performance.

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

[0045] It is understandable that when the signal source 130 excites the first radiator 110 and the second radiator 120 to simultaneously generate the first resonant mode and the second resonant mode, the center frequency of the first resonant mode is different from the center frequency of the second resonant 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 combined action of the first resonant mode and the second resonant mode.

[0046] For example, please refer to Figure 4 , Figure 4 for Figure 1 A schematic diagram of an S11 parameter curve of the antenna device 100 shown is as follows: Figure 4 As shown, the first radiator 110 and the second radiator 120 can jointly generate a first resonant mode P1 and a second resonant mode P2. The center frequency of the first resonant mode P1 can be lower than the center frequency of the second resonant mode P2. The first resonant mode P1 can, but is not limited to, cover the uplink signal frequency of the wireless signal supported by the first radiator 110 and the second radiator 120, and the second resonant mode P2 can, but is not limited to, cover the downlink signal frequency of the wireless signal supported by the first radiator 110 and the second radiator 120. Thus, the first resonant mode P1 and the second resonant mode P2 can jointly cover a relatively wide frequency band of wireless signals. Among them, the first radiator 110 and the second radiator 120 can cover the mid-to-high frequency band under the action of the first resonant mode P1 and the second resonant mode P2; of course, the first resonant mode P1 and the second resonant mode P2 can also cover other frequency bands, which is not limited in this embodiment.

[0047] It is understandable that the wireless signal corresponding to the first resonant mode P1 can also be a wireless signal in a different frequency band than the wireless signal corresponding to the second resonant mode P2. The two wireless signals can be spaced apart or partially intersect each other in the spectrum and have different center frequencies. For example, in the first resonant mode, the first radiator 110 and the second radiator 120 can support wireless signals in the B3 frequency band; in the second resonant mode, the first radiator 110 and the second radiator 120 can 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, making the antenna device 100 applicable to a wider range of scenarios.

[0048] It is understood that when the signal source 130 excites the first radiator 110 and the second radiator 120 to generate a first resonant mode or a second resonant mode, 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 with different resonant modes) or different wireless signals (at this time, the antenna device 100 can support different wireless signals with different resonant modes). This application embodiment does not limit 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 can also support other wireless signals, and the embodiments of this application do not limit this.

[0050] Please refer to the following: Figures 5 to 7 , Figure 5This is a schematic diagram of a second structure of the antenna device 100 provided in an embodiment of this application. Figure 6 for Figure 5 The diagram shows a first type of current distribution for the antenna device 100. Figure 7 for Figure 5 The diagram shows a second current distribution of the antenna device 100. When the antenna device 100 does not have a coupling adjustment circuit 140, the signal source 130 can also excite the first radiator 110 and the second radiator 120 to simultaneously generate a first resonant mode and a second resonant mode, as shown. Figure 6 As shown, the first resonant current I1 generated by the first resonant mode flows from the first ground terminal 112 toward the first free terminal 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120, flowing from the second free terminal 121 toward the second ground terminal 122 on the second radiator 120. Since the antenna device 100 does not have a coupling adjustment circuit 140, the first resonant current I1 cannot flow between the first radiator 110 and the second radiator 120 through the coupling adjustment circuit 140, thus... Figure 6 In the antenna device 100 shown, in the first resonant mode, the current density of the first resonant current I1 distributed on the first radiator 110 is greater than its current density distributed on the second radiator 120, so that in the first resonant mode, the first radiator 110, as the main radiating branch, and the second radiator 120, as the auxiliary radiating branch, 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 terminal 112 toward the first free terminal 111 on the first radiator 110, and can be electromagnetically coupled to the second radiator 120, flowing from the second ground terminal 122 toward the second free terminal 121 on the second radiator 120. Since the antenna device 100 does not have a coupling adjustment circuit 140, the second resonant current I2 cannot flow between the first radiator 110 and the second radiator 120 through the coupling adjustment circuit 140, thus... Figure 7 In the antenna device 100 shown, in the second resonance 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 resonance mode, the second radiator 120, as the main radiating branch, and the first radiator 110, as the auxiliary radiating branch, jointly support the transmission and reception of wireless signals.

[0051] Understandably, in comparison Figure 2 and Figure 6As can be seen, the antenna device 100 of this application embodiment is provided with a coupling adjustment circuit 140. The first resonant current I1, which has a large current distribution density on the first radiator 110, can flow to the second radiator 120 through the coupling adjustment circuit 140. The area with the largest current density on the first radiator 110 can be dispersed to other areas (e.g., other areas of the first radiator 110 or the second radiator 120). The current density of the first resonant current I1 distributed on the first radiator 110 and the second radiator 120 is more balanced, 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 of this application is better.

[0052] Understandably, in comparison Figure 3 and Figure 7 As can be seen, the antenna device 100 of this application embodiment is provided with a coupling adjustment circuit 140. The second resonant current I2, which has a large current distribution density on the second radiator 120, can flow to the first radiator 110 through the coupling adjustment circuit 140. The area with the largest current density on the second radiator 120 can be dispersed to other areas (e.g., other areas of the second radiator 120 or the first radiator 110). The current density of the second resonant current I2 distributed on the first radiator 110 and the second radiator 120 is more balanced, resulting in a lower SAR value generated by the second resonant mode and superior antenna performance in the second resonant mode. For example, when the second resonant mode covers the downlink signal of the wireless signal, the antenna device 100 with the coupling adjustment circuit 140 of this application has superior downlink reception performance.

[0053] It should be noted that the coupling adjustment circuit 140 has virtually no impact on the frequency of the wireless signal supported by the first radiator 110 and the second radiator 120 under the first and second resonant modes. In other words, 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 mid-to-high frequency band, under the first and second resonant modes; when the antenna device 100 is equipped with the coupling adjustment circuit 140, the first radiator 110 and the second radiator 120 can still support wireless signals in that frequency band, such as the mid-to-high frequency band, under the first and second resonant modes.

[0054] The antenna device 100 of this application embodiment is provided with a coupling adjustment circuit 140. 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. This can reduce the SAR value of the antenna device 100, reduce the antenna power back-off value, and improve the antenna performance in actual user scenarios.

[0055] Please refer to the following: Figure 8 , Figure 8 This is a schematic diagram of a third structure of the antenna device 100 provided in an embodiment of this application. The coupling adjustment circuit 140 may include at least one of the first circuit 141 and the second circuit 142.

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

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

[0058] It is understood that without the coupling adjustment circuit 140, the current density of the first resonant current I1 distributed on the first radiator 110 is greater than its current density distributed on the second radiator 120. The first circuit 141 allows a portion of the first resonant current I1 to flow from the first radiator 110 to the second radiator 120 along the first circuit 141, thereby balancing the current densities 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 densities of the first resonant current I1 equal on the first radiator 110 and the second radiator 120. It should be noted that this equality may include approximate equality. In the current simulation diagram, any scheme in which the first circuit 141 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 this application.

[0059] It is understood that without the coupling adjustment circuit 140, the current density of the second resonant current I2 distributed on the second radiator 120 is greater than its current density distributed on the first radiator 110. The second circuit 142 allows a portion of the second resonant current I2 to flow from the second radiator 120 to the first radiator 110 along the second circuit 142, thereby balancing the current densities 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 densities of the second resonant current I2 equal on the first radiator 110 and the second radiator 120. It should be noted that this equality may include approximate equality. In the current simulation diagram, any scheme of the second circuit 142 that makes the current distribution color and / or density of the first radiator 110 similar to that of the second radiator 120 is within the protection scope of the embodiments of this application.

[0060] Understandably, when the first radiator 110 and the second radiator 120 generate a first resonant mode but not a second resonant mode, the antenna device 100 or electronic device can electrically connect one end of the first circuit 141 between the signal source 130 and the feed point 113, and the other end of the first circuit 141 to the second radiator 120. The first circuit 141 can make the current density of the first resonant current I1 equal in the first radiator 110 and the second radiator 120, thereby making the SAR value lower in the first resonant mode. At this time, the antenna device 100 may only include the first circuit 141 and not the second circuit 142, or the antenna device 100 may include the second circuit 142 but the second circuit 142 may not be operational. For example, the two ends of the second circuit 142 may not be connected to the area between the second radiator 120 and the signal source 130 and the feed point 113.

[0061] Understandably, when the first radiator 110 and the second radiator 120 generate a second resonant mode but not a first resonant mode, the antenna device 100 or electronic device can electrically connect one end of the second circuit 142 between the signal source 130 and the feed point 113, and the other end of the second circuit 142 to the second radiator 120. The second circuit 142 can make the current density of the second resonant current I2 equal on the first radiator 110 and the second radiator 120, thereby making the SAR value lower in the second resonant mode. At this time, the antenna device 100 may include only the second circuit 142 and not the first circuit 141, or the antenna device 100 may include the first circuit 141 but the first circuit 141 may not be operational. For example, the two ends of the first circuit 141 may not be connected to the area between the second radiator 120 and the signal source 130 and the feed point 113.

[0062] It is understandable 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 electronic device can control one of the circuits in the first circuit 141 and the second circuit 142 to operate so as to achieve a lower SAR value by evenly distributing the resonant current in one resonant mode between the two radiators. Alternatively, the antenna device 100 or electronic device can control the first circuit 141 and the second circuit 142 to operate in a time-division multiplexing manner (which uses different time periods of the same physical connection to transmit different signals) so that the first resonant mode and the second resonant mode can operate in a time-division manner, thereby achieving a lower SAR value in a time-division manner.

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

[0064] It is understandable 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 can be greater than that 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 is more evenly distributed on the first radiator 110 and the second radiator 120. 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 is also more evenly distributed on the first radiator 110 and the second radiator 120. Thus, when the wireless signal supported by the first resonant mode and the second resonant mode covers a wider frequency band, the coupling adjustment circuit 140 of this application embodiment can make the SAR value of the wireless signal supported by the first radiator 110 and the second radiator 120 smaller across the entire frequency band, thereby improving the antenna performance of the antenna device 100 when supporting the wireless signal.

[0065] It is understandable that when the wireless signal supported by the first resonant mode covers the uplink signal band of a certain frequency band, and the wireless signal supported by the second resonant mode covers the downlink signal band of that frequency band, considering that SAR value detection generally occurs in scenarios where the antenna device 100 transmits signals outward, the coupling adjustment circuit 140 in actual scenarios may include the first circuit 141 but not the second circuit 142. Of course, in other application scenarios, the coupling adjustment circuit 140 may also include the second circuit 142, or simultaneously include the first circuit 141 and the second circuit 142. For example, when the wireless signal supported by the first resonant mode and the wireless signal supported by the second resonant mode cover two different frequency bands, the coupling adjustment circuit 140 may simultaneously include the first circuit 141 and the second circuit 142. The antenna device 100 or electronic device may control the first circuit 141 and the second circuit 142 to operate in a time-division multiplexing manner, thereby enabling the first resonant mode and the second resonant mode to have lower SAR values ​​in a time-division multiplexing manner. The embodiments of this application do not limit the specific structure of the coupling adjustment circuit 140.

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

[0067] The switch 1411 may include one or more (two or more, hereinafter not described in detail) input terminals and multiple output terminals. One end of the switch 1411, such as the input terminal, may be directly or indirectly electrically connected to the second radiator 120. One end of the first branch 1412 may be directly or indirectly electrically connected between the signal source 130 and the feed point 113, and the other end of the first branch 1412 may be directly or indirectly electrically connected between the switch 1411 (e.g., 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 end of each second branch 1413 may be directly or indirectly electrically connected between the signal source 130 and the feed point 113, and the other end of each second branch 1413 may be directly or indirectly electrically connected to one output terminal of the switch 1411.

[0068] It is understood that the first branch 1412 and at least one second branch 1413 may be, but are not limited to, a matching circuit structure, and the switch 1411 can switch between different matching circuit structures. The first branch 1412 and at least one second branch 1413 may include, but are not limited to, capacitive 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 may also have other structures, such as, but not limited to, a wire structure. This application does not limit this aspect.

[0069] Understandably, the switch 1411 can connect at least one end of the second branch 1413 to the second radiator 120, thereby forming at least one current path through the switch 1411 between the signal source 130 and the second radiator 120. Conversely, the switch 1411 can also disconnect the other end of at least one second branch 1413 from the second radiator 120, thus breaking the current path through the switch 1411 between the signal source 130 and the second radiator 120.

[0070] It is understood that the switching switch 1411 may be, but is not limited to, a single-pole multi-throw switch, a multi-pole multi-throw switch, or multiple single-pole single-throw switches. The specific structure of the switching switch 1411 is not limited in the embodiments of this application.

[0071] It is understood that regardless of whether the switch 1411 is in the ON or OFF state, the first branch 1412 can be electrically connected to the signal source 130 and the second radiator 120, and the first circuit 141 can increase the coupling between the first radiator 110 and the second radiator 120 through the first branch 1412. When the switch 1411 switches between the ON and OFF states, the first circuit 141 can further adjust the coupling between the first radiator 110 and the second radiator 120 by controlling the state of the second branch 1413.

[0072] It is understandable 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 (i.e. the lowest SAR value at this frequency), the switching switch 1411 has different switching states. By selecting the conduction state of at least one second branch 1413, the coupling amount of the first radiator 110 and the second radiator 120 is adjusted, 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 in this embodiment includes a first branch 1412 and at least one second branch 1413. The first branch 1412 can be electrically connected to the signal source 130 and the second radiator 120. The second branch 1413 can be electrically connected to or disconnected from the second radiator 120 under the control of the switching switch 1411. Thus, the first circuit 141 in this embodiment can adjust the coupling of the antenna device 100 in different ways, which can ensure that the antenna device 100 has a low SAR value in each frequency band.

[0074] In this regard, please combine Figure 8 Please refer to Figure 10 , Figure 10 This is a fifth structural schematic diagram of the antenna device 100 provided in an embodiment of this application. The first circuit 141 of the coupling adjustment circuit 140 may include a switching switch 1411 and a plurality of second branches 1413 but does not include the first branch 1412.

[0075] The switching switch 1411 may include one or more input terminals and multiple output terminals. One end of the switching switch 1411, such as an input terminal, may be directly or indirectly electrically connected to the second radiator 120. One end of each second branch 1413 may be directly or indirectly electrically connected between the signal source 130 and the feed point 113, and the other end of each second branch 1413 may be directly or indirectly electrically connected to one output terminal of the switching switch 1411. The switching switch 1411 is used to connect or disconnect the electrical connection between the other end of at least one second branch 1413 and the second radiator 120.

[0076] It is understandable that the equivalent capacitance values ​​of the multiple second branches 1413 may be different. The switching switch 1411 can select different second branches 1413 to be connected to or disconnected from the second radiator 120, so that the first circuit 141 can generate different coupling amounts to the first radiator 110 and the second radiator 120. 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 performance at this frequency.

[0077] It should be noted that the above is merely an exemplary description of the structure of the first circuit 141 in this application embodiment. The first circuit 141 may also have other structures, such as, but not limited to, the first circuit 141 may not include the switching switch 1411, and the first branch 1412 and at least one second branch 1413 may be circuit structures that achieve conduction or disconnection by adjusting parameters. This application embodiment does not limit the specific structure of the first circuit 141.

[0078] Please refer to the following: Figure 11 , Figure 11 This is a sixth structural schematic diagram of the antenna device 100 provided in the embodiments of this application. The antenna device 100 may further include a first switching circuit 160. The first circuit 141 may share some structures 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 excite the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0080] like Figure 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 of the switching switch 1411 (e.g., the input end) 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 (e.g., one output end of the switching switch 1411). The other end of each switching branch 161 may be electrically connected to the ground system 150 to achieve grounding.

[0081] It is understood that the switching switch 1411 may include multiple output terminals, such as 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. Thus, part of the first circuit 141 may be integrated into the first switching circuit 160. The first circuit 141 and the first switching circuit 160 may share some structures, which can further simplify the structure of the antenna device 100.

[0082] It is understood that the multiple switching branches 161 can be, but are not limited to, a matching circuit structure, and the inductive and capacitive load values ​​of the multiple switching branches 161 can be different. This allows the first radiator 110 and the second radiator 120 to have different electrical lengths and thus support different frequency bands of wireless signals when the switching switch 1411 selects to conduct different switching branches 161. Electrical length refers to the equivalent length of the radiating structure when radiating signals, 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 related to the frequency it supports. When the electrical length of the radiating structure is longer, it can support lower frequency wireless signals; when the electrical length of the radiating structure is shorter, it can support higher frequency wireless signals. The electrical length of the radiating structure can be changed by electrically connecting circuits with different impedances.

[0083] Understandably, the switching switch 1411 can connect or disconnect at least one switching branch 161 from the electrical connection of the second radiator 120, so that the signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0084] Understandably, the switching switch 1411 can also adaptively select 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] For example, when the switching switch 1411 selects to conduct 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 conduct the other end of at least one second branch 1413 to electrically connect with the second radiator 120 so that the first circuit 141 has a first equivalent capacitance value. At this time, under the adjustment 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 wireless signals of the first frequency band is also lower. When the switching switch 1411 selects to conduct at least one other switching branch 161 to electrically connect with the second radiator 120 so that the first radiator 110 and the second radiator 120 support the second frequency band wireless signal, the switching switch 1411 can also conduct the other end of at least one other second branch 1413 to electrically connect with the second radiator 120 so that the first circuit 141 has a second equivalent capacitance value. At this time, under the adjustment 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 the second frequency band wireless signal is also lower.

[0086] It is understandable 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 less 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 band (1920MHz-2170MHz) or the B3 band (1710MHz-1880MHz), the switch 1411 activates 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 band (2496MHz-2690MHz), the switch 1411 activates at least another second branch 1413 so that the second equivalent capacitance value of the first circuit 141 can be 0.3pF.

[0087] In this embodiment, the first switching circuit 160 and the first circuit 141 share a switching switch 1411. Part of the structure of the first circuit 141 can be integrated into the first switching circuit 160, which can simplify the structure of the antenna device 100 and realize the miniaturization design of the antenna device 100. At the same time, the switching switch 1411 can adaptively select 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, which can ensure that the antenna device 100 can obtain a low SAR value in each frequency band.

[0088] It should be noted that the first switching circuit 160 in this embodiment may not share the switching switch 1411 with the first circuit 141. That is, the first flower-cutting circuit and the first circuit 141 can be independent structures. For example, please refer to... Figure 12 , Figure 12 This is a seventh structural schematic diagram of the antenna device 100 provided in this application embodiment. The first switching circuit 160 and the first circuit 141 can be electrically connected to different regions 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. This application embodiment does not limit the specific structure 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 switching switch, a first branch, and at least one second branch, just like the first circuit 141; the second circuit 142 may also reuse part of the structure with the first switching circuit 160, or be separate from the first switching circuit 160, just like the first circuit 141. 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 an example, please refer to... Figure 13 , Figure 13 This is an eighth structural schematic diagram of the antenna device 100 provided in the embodiments of this application. The first switching circuit 160 may include a switching 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, such as the input end, can be electrically connected to the second radiator 120. One end of each switching branch 161 can be electrically connected to one output end of the switching switch 1411. 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. 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. The other end of each second branch 1413 can be electrically connected to one 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. The other end of each third branch 162 can be electrically connected to one output end of the switching switch 1411.

[0091] Understandably, the switching switch 1411 can connect or disconnect at least one switching branch 161 from the electrical connection of the second radiator 120, so that the signal source 130 can excite the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0092] Understandably, the switching switch 1411 can also adaptively select 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 of 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 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 optimal coupling amount.

[0093] Understandably, 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 of 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 of the first radiator 110 and the second radiator 120 be in the optimal range. 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 understood that the first branch 1412, the second branch 1413, and the third branch 162 can be, but are not limited to, a matching circuit structure. For example, the first branch 1412, the second branch 1413, and the third branch 162 can 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 can have different coupling amounts.

[0095] In this embodiment, 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 and enable the antenna device 100 to 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 in this application embodiment. The first circuit 141, the second circuit 142, and the first switching circuit 160 in this application embodiment may also have other structures, and this application embodiment does not limit them.

[0097] In this regard, please combine Figures 1 to 13 Please refer to Figure 14 , Figure 14 This is a ninth structural schematic diagram of the antenna device 100 provided in the embodiments of this 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 excite the first radiator 110 and the second radiator 120 to jointly support wireless signals of different frequency bands.

[0099] It is understood that the second switching circuit 170 may include a switching element and multiple (two or more) switching branches. The switching element can connect or disconnect one end of at least one switching branch from the electrical connection with the first radiator 110. Each switching branch may include, but is not limited to, any combination of elements such as capacitors and resistors. This application does not limit the specific structure of the second switching circuit 170.

[0100] It is understood that the antenna device 100 may include a first switching circuit 160 but not a second switching circuit 170; the antenna device 100 may also include a second switching circuit 170 but not a first switching circuit 160; the antenna device 100 may also include both a first switching circuit 160 and a second switching circuit 170. In this case, under the combined action of the first switching circuit 160 and the second switching circuit 170, the signal source 130 can 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, covering mid-to-high frequency bands. This application does not limit this aspect.

[0101] The antenna device 100 of this application embodiment 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 more adaptable to a wider range of scenarios.

[0102] Based on the structure of the antenna device 100 described above, this application embodiment also provides an electronic device 10. The electronic device 10 can be a smartphone, tablet computer, or other similar 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 15 , Figure 15 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 the antenna device 100 of any of the above embodiments. Figure 15 As shown, the antenna device 100 may also include a display screen 200, a mid-frame 300, a circuit board 400, a battery 500, and a rear cover 600.

[0103] The display screen 200 is disposed on the mid-frame 300 to form the display surface of the antenna device 100, and is used to display images, text and other information. The display screen 200 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen.

[0104] The middle frame 300 may include a frame 310 and a middle plate 320. The frame 310 may be a hollow frame structure forming the outer frame of the antenna device 100, and the middle plate 320 may be a thin plate or sheet structure. The middle frame 300 provides support for the electronic devices or functional components in the antenna device 100, allowing the electronic devices and functional components of the antenna device 100 to be mounted together. For example, the middle frame 300 may have grooves, protrusions, through holes, or other structures to facilitate the mounting of the electronic devices or functional components of the antenna device 100. It is understood that the material of the middle frame 300 may include metal or plastic.

[0105] The circuit board 400 is mounted on the mid-frame 300 for fixation and is sealed inside the antenna device 100 by the rear cover 600. The circuit board 400 may integrate a processor, and may also integrate one or more functional components such as a headphone jack, accelerometer, gyroscope, and motor. Simultaneously, the display screen 200 can be electrically connected to the circuit board 400 to control the display on the display screen 200 via the processor on the circuit board 400.

[0106] The battery 500 is mounted on the mid-frame 300 and sealed inside the antenna device 100 by the rear cover 600. The battery 500 is electrically connected to the circuit board 400 to power the antenna device 100. The circuit board 400 may contain a power management circuit. This power management circuit distributes the voltage supplied by the battery 500 to the various electronic components within the antenna device 100.

[0107] The rear cover 600 is connected to the middle frame 300. For example, the rear cover 600 can be attached to the middle frame 300 using an adhesive such as double-sided tape to achieve the connection with the middle frame 300. The rear cover 600, together with the middle frame 300 and the display screen 200, seals the electronic components and functional parts of the antenna device 100 inside the antenna device 100, thereby protecting the electronic components and functional parts of the antenna device 100.

[0108] It is understood that the first radiator 110 and the second radiator 120 in the embodiments of this application can be formed on the frame 310 to form a frame antenna structure. For example, please refer to Figure 16 , Figure 16 This is a schematic diagram of a second structure of the electronic device 10 provided in this application embodiment. A first metal branch 301 and a second metal branch 302 can be formed on the frame 310 through slots. 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 can reuse the conductor structure on the frame 310. This reuse of the frame 310 further enables the miniaturization design of the antenna device 100.

[0109] It should be noted that the first radiator 110 and the second radiator 120 in this application embodiment can also be formed or disposed on other structures of the electronic device 10. For example, the two radiators can be disposed on the circuit board 400, the antenna bracket, etc. This application embodiment does not limit this.

[0110] It is understood that the ground system 150 in this embodiment can be formed on the rear housing 600, the circuit board 400, or the middle plate 320 of the middle frame 300. A conductor region 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 disposed on this conductor region. For example, such as... Figure 16 As shown, a ground system 150 may be provided on the middle plate 320, and the middle plate 320 may be reused as a 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 grounded by means of, but not limited to, grounding springs, grounding pins, grounding pads and other structures, through electrical connection with the ground system 150.

[0111] It is understood that one or more of the signal source 130, coupling adjustment circuit 140, first switching circuit 160, and second switching circuit 170 in this application embodiment may be, but are not limited to, disposed on the circuit board 400; of course, one or more of the above components may also be disposed on the small board of the antenna device 100. This application embodiment does not limit the specific placement of the above structures.

[0112] It is understood that the above are merely exemplary examples of the antenna device 100. The antenna device 100 of this application embodiment may also include components such as a camera, a sensor, and an acoustic-to-electric conversion device. These components can be found in the descriptions in the related technologies, and will not be repeated here.

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

[0114] The antenna device 100 and electronic device 10 of this application embodiment include a coupling adjustment circuit 140. This circuit adjusts the coupling between the first radiator 110 and the second radiator 120, resulting in a more balanced unidirectional current in the first resonant mode and a more balanced reverse current in the second resonant mode. This reduces the SAR values ​​in both resonant modes and improves antenna performance in real-world usage scenarios. Furthermore, a first switching circuit 160 and a second switching circuit 170 are respectively provided on the first radiator 110 and the second radiator 120, enabling switching between different frequency bands. When the first switching circuit 160 is a multiplexer, one or more of which are used as switching branches, and another or more of which are multiplexed as coupling adjustment circuit 140, in order to have a lower SAR value, the first switching circuit 160, the second switching circuit 170, and the coupling adjustment circuit 140 (first circuit 141 and second circuit 142) can select appropriate branches to achieve the best coupling amount of the first radiator 110 and the second radiator 120 in different frequency bands, thereby ensuring that the antenna device 100 and the electronic device 10 achieve a lower SAR value in each frequency band.

[0115] 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.

[0116] The antenna device and electronic device 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, and 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 antenna device, characterized in that, include: The first radiator includes a first free end, a feed point, and a first grounding end, wherein the first grounding end is grounded; The signal source is electrically connected to the feed point; The second radiator includes 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 is provided, one end of which is electrically connected between the signal source and the feed point, and the other end of which is electrically connected to the second radiator. The coupling adjustment circuit includes a first circuit comprising a switch, a first branch, and at least one second branch. One end of the switch is electrically connected to the second radiator. One end of the first branch is electrically connected between the signal source and the feed point, and the other end of the first branch is electrically connected between the switch and the second radiator. One end of each second branch is electrically connected between the signal source and the feed point, and the other end of each second branch is electrically connected to the switch. The switch is used to connect or disconnect the electrical connection between the other end of at least one second branch and the second radiator. 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 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 the first resonant mode and the second resonant mode; The 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 terminal toward the first free terminal on the first radiator and flows from the second ground terminal toward the second free terminal 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 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 first circuit is used to allow the first resonant current to flow along the first circuit between the first radiator and the second radiator.

5. The antenna device according to any one of claims 1 to 4, characterized in that, The antenna device further includes: The first switching circuit includes the switching switch and at least one switching branch, wherein one end of each switching branch is electrically connected to the switching switch and the other end is grounded; wherein... The switching switch is used to connect or disconnect at least one of the switching branches from 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 switching switch is also 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, based on the frequency band of the wireless signals supported by the first radiator and the second radiator.

6. The antenna device according to any one of claims 2 to 4, characterized in that, When the first resonant mode supports wireless signals of the first frequency band, the first circuit has a first equivalent capacitance value; when the first resonant mode supports wireless signals of the second frequency band, the first circuit has a second equivalent capacitance value. Wherein, the first frequency band is higher than the second frequency band, and the first equivalent capacitance value is less than the second equivalent capacitance value.

7. The antenna device according to any one of claims 2 to 4, 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 includes an input terminal, a first output terminal, and a second output terminal. The input terminal is electrically connected between the signal source and the feed point, and the first output terminal is electrically connected to one end of the first circuit. A second circuit, one end of which is electrically connected to a second output terminal, and the other end of which is electrically connected to the second radiator; wherein... The control switch is used to control the input terminal and the first output terminal to be connected, and the first circuit is used to cause the first resonant current to flow along the first circuit between the first radiator and the second radiator; or... The control switch is used to control the input terminal and the second output terminal to be turned on, and the second circuit is used to make the second resonant current flow along the second circuit between the first radiator and the second radiator.

8. The antenna device according to claim 7, characterized in that, The frequency band of the wireless signal supported by the first resonant mode is lower than that supported by the second resonant mode, and the equivalent capacitance value of the first circuit is greater than that of the second circuit.

9. The antenna device according to any one of claims 1 to 4, characterized in that, The antenna device further includes: A first switching circuit, one end of which is electrically connected to the second radiator and the other end grounded; under the action of the first switching circuit, the signal source is used to excite the first radiator and the second radiator to jointly support wireless signals of different frequency bands; and / or, A second switching circuit is provided, with one end electrically connected to the first radiator and the other end grounded. Under the action of the second switching circuit, the signal source is used to excite the first radiator and the second radiator to jointly support wireless signals of different frequency bands.

10. An electronic device, characterized in that, Includes the antenna device as described in any one of claims 1 to 9.

11. The electronic device according to claim 10, characterized in that, The electronic device also includes a frame and a middle plate, and a ground system is provided on the middle plate. The first grounding terminal and the second grounding terminal are electrically connected to the ground system to achieve grounding. The frame is formed with a first metal branch and a second metal branch through a slit, the first radiator includes the first metal branch, and the second radiator includes the second metal branch.

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