Electronic device

Abstract

The application provides an electronic device, a first radiator of the electronic device comprises a first free end, a first feed point and a first ground end arranged in sequence, the distance between the first feed point and the first free end is less than the distance between the first feed point and the first ground end; one end of a single-pole single-throw switch is electrically connected between the first feed source and the first feed point, and the other end is electrically connected to one end of a load element, and the other end of the load element is electrically connected to a ground plane; the single-pole single-throw switch disconnects the electrical connection between the load element and the first feed source and the first feed point, so that the first feed source excites the first radiator to generate a first resonant mode supporting the transceiving of the first wireless signal of the first frequency band; the single-pole single-throw switch connects the electrical connection between the load element and the first feed point and the first feed source, so that the first feed source excites the first radiator to generate a second resonant mode supporting the transceiving of the first wireless signal of the second frequency band. Based on this, the electronic device of the application can balance low cost and low SAR value.

Description

Technical Field

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

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

[0003] Relevant laws stipulate that the SAR value of mobile phone antennas cannot exceed 1.6 W / kg. Electronic devices using this technology often incorporate a backoff mechanism, which reduces the antenna's transmission power to lower the SAR value when an excessively high SAR value is detected. However, this backoff operation severely impacts 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 electronic device that can have a low SAR value and superior radiation performance when supporting wireless signals of different frequency bands.

[0005] This application provides an electronic device, including:

[0006] The first radiator includes a first free end, a first feed point, and a first ground end arranged in sequence. The first ground end is electrically connected to a ground plane to achieve grounding. The distance between the first feed point and the first free end is less than the distance between the first feed point and the first ground end.

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

[0008] The first switching circuit includes a single-pole single-throw switch and a load element connected in series. One end of the single-pole single-throw switch is electrically connected between the first feed source and the first feed point, and the other end is electrically connected to one end of the load element. The other end of the load element is electrically connected to the ground plane.

[0009] The single-pole single-throw switch is used to disconnect the load element from the first feed source and the first feed point, so that the first feed source excites the first radiator to generate a first resonant mode that supports the transmission and reception of a first wireless signal in the first frequency band.

[0010] The single-pole single-throw switch is also used to connect the load element to the first feed point and the first feed source, so that the first feed source excites the first radiator to generate a second resonant mode that supports the transmission and reception of a first wireless signal in the second frequency band.

[0011] In the electronic device of this application, the distance between the first feed point and the first free end of the first radiator is less than the distance between the first feed point and the first grounding end. One end of a single-pole single-throw switch is electrically connected between the first feed source and the first feed point, and the other end is electrically connected to one end of a load element, the other end of which is electrically connected to a ground plane. When the single-pole single-throw switch of the first switching circuit disconnects the electrical connection between the load element and the first feed source and the first feed point, the resonant current generated by the first feed source exciting the first radiator has a strong current distribution in the region near the first grounding end and the region near the first free end. The resonant current is more evenly distributed across the entire first radiator, and the first feed source exciting the first radiator can have better radiation performance and a lower SAR value when supporting the transmission and reception of the first wireless signal in the first frequency band. When the single-pole single-throw switch connects the load element to the first feed point and the first feed source, the load element can be grounded. The grounded load element can further disperse the resonant current, which can make the first feed source exciting the first radiator have better radiation performance and a lower SAR value when supporting the transmission and reception of the first wireless signal in the second frequency band. Based on this, the electronic device of this application embodiment can maintain superior radiation performance and low SAR value during the switching process of signals of different frequency bands through a simple single-pole single-throw switch. This application can ensure that the antenna radiation performance and low SAR value are maintained when the electronic device supports signals of different frequency bands. At the same time, the cost of the single-pole single-throw switch is much lower than that of other complex switching circuits on the market. Thus, the electronic device of this application can achieve both low cost and low SAR value. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0014] Figure 2 for Figure 1 The diagram shows an electrical connection of an electronic device.

[0015] Figure 3 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application.

[0016] Figure 4 for Figure 3 The diagram shows a schematic of an S-parameter curve for an electronic device.

[0017] Figure 5 for Figure 3 The diagram shows the first type of current distribution for the electronic device.

[0018] Figure 6 for Figure 3 The diagram shows a second type of current distribution for the electronic device.

[0019] Figure 7 for Figure 3 The diagram shows a third type of current distribution in the electronic device.

[0020] Figure 8 for Figure 3 The diagram shows the S-parameter curves of the electronic device when it supports the first wireless signal in different frequency bands.

[0021] Figure 9 This is a schematic diagram of a third structure of an electronic device provided in an embodiment of this application.

[0022] Figure 10 This is a schematic diagram of a fourth structure of an electronic device provided in an embodiment of this application.

[0023] Figure 11 for Figure 10 The diagram shows a schematic of an S-parameter curve for an electronic device.

[0024] Figure 12 for Figure 10 The diagram shows the first type of current distribution for the electronic device.

[0025] Figure 13 for Figure 10 The diagram shows a second type of current distribution for the electronic device.

[0026] Figure 14 for Figure 10 The diagram shows a third type of current distribution in the electronic device.

[0027] Figure 15 This is a fifth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0028] Figure 16 for Figure 15 The diagram shows the first type of current distribution for the electronic device.

[0029] Figure 17 for Figure 15 The diagram shows a second type of current distribution for the electronic device.

[0030] Figure 18 for Figure 15 The diagram shows a schematic of an S-parameter curve for an electronic device.

[0031] Figure 19 for Figure 15 The diagram shows an electrical connection of an electronic device.

[0032] Figure 20 This is a sixth structural schematic diagram of the electronic device provided in the embodiments of this application.

[0033] Figure 21 This is a seventh structural schematic diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0034] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 21 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] This application provides an electronic device, which can be a smartphone, tablet computer, or other similar device. It can also be a gaming device, augmented reality (AR) device, automotive device, data storage device, audio playback device, video playback device, laptop computer, desktop computing device, etc. Please refer to... Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a first structure of the electronic device 10 provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows an electrical connection of an electronic device 10. The electronic device 10 includes a first radiator 110, a first feed source 120, and a first switching circuit 130.

[0036] The first radiator 110 includes a first free end 111, a first feed point 112, and a first ground end 113 arranged sequentially. The first ground end 113 is directly or indirectly electrically connected to the grounding plane 140 to achieve grounding. The first feed point 112 can be positioned close to the first free end 111 such that the distance between the first feed point 112 and the first free end 111 is less than the distance between the first feed point 112 and the first ground end 113. The first feed source 120 can be directly or indirectly electrically connected to the first feed point 112. The first feed source 120 can provide a first excitation signal to excite the first radiator 110 to support the transmission and reception (including transmission and reception) of a first wireless signal. One end of the first switching circuit 130 can be directly or indirectly electrically connected to the area between the first feed point 112 and the first feed source 120, and the other end of the first switching circuit 130 can be directly or indirectly electrically connected to the grounding plane 140 to achieve grounding. The first switching circuit 130 may include a single-pole single-throw switch 131 and a load element 132 connected in series. One end of the assembly formed by the single-pole single-throw switch 131 and the load element 132 connected in series may be electrically connected to the area between the first feed point 112 and the first feed source 120, and the other end of the assembly may be electrically connected to the ground plane 140 to achieve grounding. The single-pole single-throw switch 131 can disconnect the load element 132 from the ground plane 140 and the area between the first feed point 112 and the first feed source 120 by disconnecting its two contacts, so that the first feed source 120 excites the first radiator 110 to generate a first resonant mode that supports the first wireless signal transmission and reception in the first frequency band. The single-pole single-throw switch 131 can also conduct the electrical connection between the load element 132 and the ground plane 140, as well as the first feed point 112 and the first feed source 120 (area) by conducting its two contacts, so that the first feed source 120 excites the first radiator 110 to generate a second resonant mode that supports the transmission and reception of the first wireless signal in the second frequency band.

[0037] It is understood that the other end of the load element 132 of the first switching circuit 130 can be connected to the ground plane 140, and the single-pole single-throw switch 131 of the first switching circuit 130 can conduct the electrical connection between one end of the load element 132 and the area between the first feed point 112 and the first feed source 120, so that the first feed source 120 excites the first radiator 110 to generate a second resonant mode supporting the first wireless signal transmission and reception in the second frequency band. Alternatively, the single-pole single-throw switch 131 can disconnect the connection between one end of the load element 132 and the area between the first feed point 112 and the first feed source 120. For example, as Figure 1 and Figure 2As shown, one end of the single-pole single-throw switch 131 can be electrically connected to the area between the first feed point 112 and the first feed source 120, and the other end of the single-pole single-throw switch 131 can be electrically connected to one end of the load element 132. The other end of the load element 132 is electrically connected to the ground plane 140 to achieve grounding. Of course, in other embodiments, one end of the load element 132 can be electrically connected to the area between the first feed point 112 and the first feed source 120, and the other end of the load element 132 can be electrically connected to one end of the single-pole single-throw switch 131, with the other end of the single-pole single-throw switch 131 grounded. The specific structure of the first switching circuit 130 is not limited in this application embodiment.

[0038] It is understood that the ground plane 140 can form a common ground. The ground plane 140 can be a plane or structure with zero potential. The ground plane 140 can be a component of the electronic device 10 or other devices. For example, the ground plane 140 can be formed through conductors, printed circuits, or metal printed layers in the electronic device 10; the ground plane 140 can be formed on the motherboard, small board, or other carrier board of the electronic device 10; or, the ground plane 140 can also be formed on the frame of the electronic device 10. This application embodiment does not limit the specific location of the ground plane 140.

[0039] It is understood that the first radiator 110 may be, but is not limited to, a straight strip, a bent shape, or other shapes. The first radiator 110 is a conductor structure capable of supporting the transmission and reception of a first wireless signal. For example, the first wireless signal supported by the first radiator 110 may be, but is not limited to, transmitting Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, 3rd Generation (3G), 4th Generation (4G), 5th Generation (5G), Near Field Communication (NFC), Bluetooth (BT), Ultra Wideband (UWB), and other signals. This application embodiment does not specifically limit the structure of the first radiator 110 or the wireless signals it supports.

[0040] It is understood that the first frequency band and the second frequency band can be two frequency bands with different center frequencies within the first wireless signal. The first frequency band can be completely separated from the second frequency band, or the first frequency band can at least partially overlap with the second frequency band but with different center frequencies. When the first wireless signal can be, but is not limited to, a mid-to-high frequency wireless signal (Middle frequency band and High frequency band, abbreviated as MHB, the frequency of the MHB band is between 1000MHz and 3000MHz), the first frequency band can be, but is not limited to, the B3 band (1710MHz-1880MHz), and the second frequency band can be, but is not limited to, the B1 band (1920MHz-2170MHz). This application does not specifically limit the first wireless signal, the first frequency band, or the second frequency band in its embodiments.

[0041] It is understood that the first feed source 120 can be a signal source for the electronic device 10. The first feed source 120 can convert high-frequency excitation signals or confined electromagnetic waves into radiated electromagnetic energy to excite the first radiator 110 to support the transmission of the first wireless signal. At the same time, the first radiator 110 can also capture and confine electromagnetic waves in free space and transmit them to the first feed source 120 to form a current signal, so that the first radiator 110 can support the reception of the first wireless signal.

[0042] When the first feed source 120 provides an excitation signal to the first radiator 110, if the single-pole single-throw switch 131 disconnects the electrical connection between the load element 132 and the first feed source 120 and the first feed point 112 (region), the load element 132 is not grounded. The first feed source 120 can excite the first radiator 110 to generate a first resonant mode and support the transmission and reception of the first wireless signal in the first frequency band. At this time, since the first feed point 112 of the first radiator 110 is located close to the first free end 111, the resonant current generated by the first feed source 120 to excite the first radiator 110 can have a strong current distribution in the region near the first ground terminal 113 and the region near the first free end 111 of the first radiator 110. The strong resonant current is more evenly distributed across the entire first radiator 110. When the first radiator 110 supports the transmission and reception of the first wireless signal, such as the first wireless signal in the first frequency band, it can have both superior radiation performance and a low SAR value.

[0043] When the first feed source 120 provides an excitation signal to the first radiator 110, if the single-pole single-throw switch 131 conducts the electrical connection between the load element 132 and the first feed point 112 and the first feed source 120 (region), the load element 132 is grounded. The first feed source 120 can excite the first radiator 110 to generate a second resonant mode and support the transmission and reception of the first wireless signal in the second frequency band. At this time, the resonant current generated by the first feed source 120 to excite the first radiator 110 has a strong current distribution in the region near the first ground terminal 113 and the region near the first free terminal 111. In addition, the resonant current can also be grounded through the load element 132. The strong region of the resonant current can be dispersed in at least three regions. The strong region of the resonant current is more evenly distributed on the entire first radiator 110. When the first radiator 110 supports the transmission and reception of the first wireless signal, such as the first wireless signal in the second frequency band, it can have both better radiation performance and a lower SAR value.

[0044] For example, when the first wireless signal is an MHB signal, and the first wireless signal of the first frequency band is a B3 band signal, and the first wireless signal of the second frequency band is a B1 band signal, if the two contacts of the single-pole single-throw switch 131 disconnect, causing the single-pole single-throw switch 131 to disconnect the electrical connection between the load element 132 and the first feed source 120 and the first feed point 112 (area), the load element 132 can be ungrounded. The first feed source 120 can excite the first radiator 110 to support the B3 band wireless signal. At this time, the actual measured total radiated power (TRP) of the first radiator 110 supporting the B3 band is approximately 20.5 dB, the actual measured SAR value is approximately 2.27 W / kg, and the actual measured TRP after backoff is approximately 18.7 dB. The first radiator 110 has superior radiation performance and a lower SAR value when supporting the B3 band MHB wireless signal. Similarly, if the two contacts of the single-pole single-throw switch 131 are connected, enabling the single-pole single-throw switch 131 to conduct the electrical connection between the load element 132 and the first feed source 120 and the first feed point 112 (area), the load element 132 is grounded. The first feed source 120 can excite the first radiator 110 to support the B1 band wireless signal. At this time, the actual measured TRP of the first radiator 110 supporting the B1 band is approximately 21.4 dB, the actual measured SAR value is approximately 2.07 W / kg, and the actual measured TRP after fallback is approximately 20 dB. The first radiator 110 also has superior radiation performance and a low SAR value when supporting the B1 band MHB wireless signal.

[0045] It is understandable that the higher the frequency band of the wireless signal supported by the first radiator 110, the more likely the first radiator 110 will have a higher SAR value. In this embodiment, when supporting the higher frequency B1 band, the two contacts of the single-pole single-throw switch 131 are turned on and the load element 132 is grounded. The load element 132 can further disperse the strong area of ​​the resonant current generated by the first radiator 110, and can reduce the antenna SAR value as much as possible while ensuring the radiation performance of the B1 band. Of course, the electronic device 10 in this embodiment can also control the two contacts of the single-pole single-throw switch 131 to disconnect and the load element 132 to be ungrounded when supporting the lower frequency B1 band wireless signal, and control the two contacts of the single-pole single-throw switch 131 to connect and the load element 132 to be grounded when supporting the higher frequency B3 band wireless signal. This embodiment does not limit this.

[0046] It is understood that since the B39 band (1880MHz to 1920MHz) lies between the B3 band (1710MHz-1880MHz) and the B1 band (1920MHz to 2170MHz) in the spectrum, when the first radiator 110 of this embodiment supports the B1 and B3 bands under the action of the first switching circuit 130, the first radiator 110 can also cover the B39 band, thereby also supporting wireless signals of the B39 band. In other words, the first radiator 110 of this embodiment can cover the B3, B39, and B1 bands.

[0047] It is understood that the load element 132 in this embodiment can be, but is not limited to, an inductor. The inductance value of the inductor can be less than or equal to 10 nanohenries, so that the load element 132 can be a small inductor. When the single-pole single-throw switch 131 grounds the small inductor, the smaller the inductance value of the inductor, the higher the frequency of the second frequency band supported by the first radiator 110, and the electronic device 10 can reduce the SAR value of higher frequency wireless signals. Of course, it should be noted that the load element 132 in this application can also be a circuit structure formed by one or more inductors, capacitors, and resistors connected in series or in parallel. Any structure with a certain impedance can be the load element 132 in this embodiment, and the specific structure of the load element 132 in this embodiment is not limited.

[0048] Understandably, the first feed 120 can excite the first radiator 110 to support the first wireless and second frequency bands in a similar resonant mode. For example, when the two contacts of the single-pole single-throw switch 131 disconnect, causing the single-pole single-throw switch 131 to disconnect the electrical connection between the load element 132 and the first feed 120 and the first feed point 112 (region), the first feed 120 excites the first radiator 110 to generate a first resonant mode that supports the first wireless signal transmission and reception in the first frequency band. This first resonant mode can form a first resonant current flowing from the first ground terminal 113 toward the first free terminal 111 on the first radiator 110. When the two contacts of the single-pole single-throw switch 131 are connected, enabling the single-pole single-throw switch 131 to conduct the electrical connection between the load element 132 and the first feed source 120 and the first feed point 112 (region), the first feed source 120 excites the first radiator 110 to generate a second resonant mode that supports the transmission and reception of the first wireless signal in the second frequency band. At this time, the second resonant mode can also form a second resonant current flowing from the first ground terminal 113 toward the first free terminal 111 on the first radiator 110. Furthermore, since the single-pole single-throw switch 131 conducts the electrical connection between the load element 132 and the ground plane 140, the second resonant current can also be grounded through the load element 132, and the second resonant mode can also form a second resonant current flowing from the first ground terminal 113 and the load element 132 toward the first free terminal 111 on the first radiator 110.

[0049] It should be noted that the first feed source 120 can also excite the first radiator 110 to support the first wireless and second frequency bands in different resonant modes, and this application embodiment does not limit this.

[0050] In the electronic device 10 of this application embodiment, the distance between the first feed point 112 and the first free end 111 of the first radiator 110 is less than the distance between the first feed point 112 and the first ground end 113; one end of the single-pole single-throw switch 131 is electrically connected to the area between the first feed source 120 and the first feed point 112, and the other end is electrically connected to one end of the load element 132, the other end of the load element 132 is electrically connected to the ground plane 140. When the single-pole single-throw switch 131 of the first switching circuit 130 disconnects the load element 132 and disconnects the electrical connection between the first feed source 120 and the first feed point 112, the first feed source 120 excites the first radiator 110 to generate a resonant current of the first resonant mode, which has a strong current distribution in the area near the first ground end 113 and the area near the first free end 111. The resonant current is more evenly distributed throughout the first radiator 110. When the first feed source 120 excites the first radiator 110 to support the transmission and reception of the first wireless signal in the first frequency band, it can have better radiation performance and a lower SAR value. When the single-pole single-throw switch 131 connects the load element 132 to the electrical connection between the first feed point 112 and the first feed source 120 (region), the grounded load element 132 can further disperse the resonant current. This allows the second resonant mode generated by the first radiator 110 excited by the first feed source 120 to have better radiation performance and lower SAR value when supporting the transmission and reception of the first wireless signal in the second frequency band. Based on this, the electronic device 10 of this application embodiment can realize the switching and adjustment of signals in different frequency bands through the simple single-pole single-throw switch 131, ensuring the antenna radiation performance and low SAR value when the electronic device 10 supports signals in different frequency bands. At the same time, the cost of the single-pole single-throw switch 131 is much lower than that of other complex switching circuits on the market. Therefore, the electronic device 10 of this application can achieve both low cost and low SAR value.

[0051] In this regard, please combine Figure 1 and Figure 2 Please refer to Figure 3 , Figure 3 This is a second structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 may further include a second radiator 150 and a second switching circuit 160.

[0052] The second radiator 150 is disposed on the side of the first radiator 110 away from the first grounding terminal 113, at the first free end 111. The second radiator 150 may include a second free end 151 and a second grounding terminal 152. The second free end 151 may be spaced apart from the first free end 111, and the second grounding terminal 152 may extend away from the second free end 151, thereby forming a common-aperture antenna with the first radiator 110. One end of the second switching circuit 160 may be directly or indirectly electrically connected to the second grounding terminal 152 of the second radiator 150, and the other end of the second switching circuit 160 may be electrically connected to the grounding plane 140 to achieve grounding. Wherein, as Figure 3 As shown, the second switching circuit 160 can connect the second ground terminal 152 to the ground plane 140, and the excitation current generated on the second radiator 150 can return to ground from the second ground terminal 152. The first feed 120 can also at least excite the second radiator 150 to generate a third resonant mode that supports the transmission and reception of the first wireless signal in the third frequency band.

[0053] It is understood that the second switching circuit 160 may include, but is not limited to, at least one of the following components: switch, capacitor, and inductor. The embodiments of this application do not limit the second switching circuit 160.

[0054] It is understood that when the electronic device 10 includes a second radiator 150 and a second switching circuit 160, the first feed source 120 can excite the first radiator 110 and the second radiator 150 to generate at least two resonant modes.

[0055] For example, please refer to Figure 4 and Figure 5 , Figure 4 for Figure 3 The diagram shows an S-parameter curve of the electronic device 10. Figure 5 for Figure 3 The diagram shows a first current distribution of the electronic device 10. A first feed 120 can excite a first radiator 110 to generate a first resonant mode. This first resonant mode can form a first resonant current I1 flowing from the first ground terminal 113 towards the first free terminal 111 on the first radiator 110, so that the first feed 120 can excite the first radiator 110 to generate the first resonant mode and support a first wireless signal in a first frequency band. Figure 4 As shown in region A of curve S1, electronic device 10 can generate a first resonant mode.

[0056] For another example, please refer to Figure 6 , Figure 6 for Figure 3The schematic diagram of the second current distribution of the electronic device 10 shown illustrates that the first feed source 120 can excite the first radiator 110 to generate a second resonant mode. This second resonant mode can form a first resonant current I2 flowing from the first ground terminal 113 and the load element 132 toward the first free terminal 111 on the first radiator 110, so that the first feed source 120 can excite the first radiator 110 to generate the second resonant mode and support a first wireless signal in a second frequency band. This second resonant mode is similar to the first resonant mode, and the frequencies of the wireless signals they support can be not significantly different, for example, such as... Figure 4 As shown in region A of curve S1, the wireless signal represented in region A can also be supported by the first resonant mode of electronic device 10.

[0057] For another example, please refer to... Figure 4 And refer to Figure 7 , Figure 7 for Figure 3 A schematic diagram of the third current distribution in the electronic device 10 shown. (See diagram below.) Figure 7 As shown, when the second switching circuit 160 connects the second ground terminal 152 to the ground plane 140, the first feed 120 can excite the second radiator 150 to generate a third resonant mode. This second resonant mode can form a second resonant current I3 flowing from the second ground terminal 152 towards the second free terminal 151 on the second radiator 150, so that the first feed 120 can excite the second radiator 150 to generate a third resonant mode and support the first wireless signal of the third frequency band. During this process, a small portion of the third resonant current I3 can also flow on the first radiator 110. In actual debugging, the contribution of this small portion of the third resonant current I3 to the second resonant mode can be ignored, so that the first feed 120 mainly excites the second radiator 150 to support the transmission and reception of the first wireless signal of the third frequency band. Of course, it can also be considered that the first feed 120 can excite the second radiator 150 as the main radiator and the first radiator 110 as the auxiliary radiator to jointly support the transmission and reception of the first wireless signal of the third frequency band. Figure 4 As shown in region B of curve S1, electronic device 10 can generate a third resonant mode.

[0058] It is understandable that when the second switching circuit 160 connects the second ground terminal 152 and the ground plane 140, the third resonant current I3 can have a strong current distribution in the region near the first feed point 112 of the first radiator 110 and near the second ground terminal 152 of the second radiator 150. The third resonant current I3 can be distributed on the two radiators, so that the second radiator 150 can also have better radiation performance and lower SAR value when supporting the first wireless signal of the third frequency band.

[0059] It is understood that the third frequency band may differ from the first and second frequency bands. For example, the third, first, and second frequency bands may be alternated, or at least two of the third, first, and third frequency bands may partially overlap but have different center frequencies. For instance, the first frequency band may be B3, the second frequency band may be B1, and the third frequency band may be B40 (2300MHz to 2400MHz) or B41 (2496MHz to 2690MHz). In actual debugging, when the second switching circuit 160 connects the second ground terminal 152 to the ground plane 140, the first feed 120 can excite the second radiator 150 as the primary radiator and the first radiator 110 as the auxiliary radiator to jointly support the transmission and reception of a relatively wide third frequency band, so that the third frequency band can simultaneously cover both the B40 and B41 frequency bands.

[0060] Understandably, in order to further reduce the SAR value of the first wireless signal in the third frequency band supported by the second radiator 150, when the second switching circuit 160 connects the second grounding terminal 152 to the grounding plane 140, the single-pole single-throw switch 131 can also connect the load element 132 to the first feed point 112 and the second radiator 150 (area) to ground the load element 132. At this time, the first feed source 120 can excite the first radiator 110 as the main radiator to support the first wireless signal in the second frequency band, and can excite the second radiator 150 as the main radiator to support the first wireless signal in the third frequency band. The electronic device 10 can simultaneously support the first wireless signals in both the second and third frequency bands, and both the second and third frequency bands can have better SAR values.

[0061] Of course, when the second switching circuit 160 connects the second grounding terminal 152 to the grounding plane 140, the single-pole single-throw switch 131 can also disconnect the electrical connection between the load element 132 and the first feed point 112 and the second radiator 150 (region). At this time, the first feed source 120 can excite the first radiator 110 as the main radiator to support the first wireless signal of the first frequency band, and can excite the second radiator 150 as the main radiator to support the first wireless signal of the third frequency band. The electronic device 10 can simultaneously support the first wireless signals of the first and third frequency bands, and the electronic device 10 can realize the transmission and reception of dual-band wireless signals.

[0062] For example, please refer to Figure 8 , Figure 8 for Figure 3 The diagram shows the S-parameter curves of the electronic device 10 when it supports the first wireless signal in different frequency bands. Figure 8Curve S2 is the S-parameter curve of the first radiator 110 excited by the first feed 120 to support the first wireless signal in the first frequency band; curve S3 is the S-parameter curve of the first radiator 110 excited by the first feed 120 to support the first wireless signal in the second frequency band; and curve S4 is the S-parameter curve of the second radiator 150 excited by the first feed 120 to support the first wireless signal in the third frequency band. As can be seen from curves S1 to S3, the first radiator 110 and the second radiator 150 in this embodiment of the application can achieve full-band switching of B3, B39, B1, B40, and B41 in the MHB frequency band under the excitation of the first feed 120.

[0063] The electronic device 10 of this application embodiment includes a first radiator 110 and a second radiator 150. Under the action of the first switching circuit 130 and the second switching circuit 160, the first radiator 110 and the second radiator 150 can generate at least two resonant modes and realize MHB full-band switching. The electronic device 10 can support the transmission and reception of wireless signals in more frequency bands.

[0064] Please refer to the following: Figure 9 , Figure 9 This is a schematic diagram of a third structure of the electronic device 10 provided in an embodiment of this application. Figure 9 The electronic device 10 shown includes, in addition to, a first radiator 110, a second radiator 150, a first feed source 120, and a second switching circuit 160. Figure 9 The first switching circuit 130 of the electronic device 10 shown may include multiple switching branches. For example, the first switching circuit 130 may include an SP4T switch and four switching branches. Figure 9 The first feed point 112 of the first radiator 110 of the electronic device 10 shown is located in a region close to the first free end 111, such that the distance between the first feed point 112 and the first free end 111 is less than the distance between the first feed point 112 and the first ground end 113. The first feed source 120 can excite the first radiator 110 to generate a first resonant mode and support a first wireless signal in a first frequency band, and can also excite the first radiator 110 to generate a second resonant mode and support a first wireless signal in a second frequency band. Both the first resonant mode and the second resonant mode can form a resonant current distribution flowing from the first ground end 113 toward the first free end 111 on the first radiator 110. Thus, under the action of the first resonant mode and the second resonant mode, the first radiator 110 can support the B1 frequency band, the B3 frequency band, or the B39 frequency band. The first feed 120 can also excite the second radiator 150 to generate a third resonant mode and support a first wireless signal in a third frequency band. The third resonant mode forms a third resonant current on the second radiator 150 that flows from the second ground terminal 152 toward the second free terminal 151. For example, the second radiator 150 can support wireless signals in the B40 or B41 frequency band in the third resonant mode.

[0065] Understandable Figure 9 In the embodiment shown, the first switching circuit 130 can switch different switching branches to ground under the action of the SP4T switch, so that after different switching branches are grounded, they can switch between the B1 frequency band, B3 frequency band, B39 frequency band, B40 frequency band or B41 frequency band.

[0066] Figure 9 In the electronic device 10 of the illustrated embodiment, the first radiator 110, when supporting wireless signals in the B3 band, has an actual measured TRP of approximately 20 dB, an actual measured SAR value of approximately 1.921 W / kg, and an actual measured TRP after fallback of approximately 18.9 dB. The first radiator 110, when supporting wireless signals in the B1 band, has an actual measured TRP of approximately 20.1 dB, an actual measured SAR value of approximately 1.475 W / kg, and an actual measured TRP after fallback of approximately 20.1 dB. Figure 9 The electronic device 10 of the illustrated embodiment has superior radiation performance and SAR value. Because... Figure 9 The electronic device 10 shown requires a first switching circuit 130 and a second switching circuit 160. Of the two switching circuits, the SP4T switch is more expensive. Figures 1 to 8 In the electronic device 10 of the illustrated embodiment, although the radiation of the B1 band is slightly lower than... Figure 9 The electronic device 10 of the illustrated embodiment, but Figures 1 to 8 The electronic device 10 of the illustrated embodiment uses a single-pole single-throw switch 131 for switching, and its production cost is lower than that of other devices. Figure 9 The production cost of the electronic device 10 shown.

[0067] To further reduce costs, the electronic device 10 in this embodiment can also support wireless signals in different frequency bands by forming different resonant modes through the antenna radiator. For example, please refer to... Figure 10 , Figure 10 This is a fourth structural schematic diagram of the electronic device 10 provided in the embodiments of this application. The electronic device 10 may include a first radiator 110, a second radiator 150, and a second switching circuit 160. However, the electronic device 10 does not include the first switching circuit 130. The first feed point 112 of the first radiator 110 may be located in the middle of the first radiator 110. The ratio of the distance from the first feed point 112 to the first free end 111 to the distance from the first feed point 112 to the first ground end 113 may be between two-thirds and three-half. The second ground end 152 of the second radiator 150 may be grounded through the second switching circuit 160.

[0068] like Figures 11 to 14 , Figure 11 This is a schematic diagram of an S-parameter curve for the electronic device 10 shown in Figure 10. Figure 12 for Figure 10 The diagram shows the first type of current distribution in the electronic device 10. Figure 13 for Figure 10 The diagram shows a second type of current distribution in the electronic device 10. Figure 14 for Figure 10 A schematic diagram of the third current distribution in the electronic device 10 shown. (See diagram below.) Figure 12 As shown, when the first feed 120 provides the first excitation signal, the first feed 120 can excite the first radiator 110 to generate a first current pattern flowing from the first ground terminal 113 toward the first free terminal 111; as Figure 11 As shown in region C of curve S5, electronic device 10 can generate a first mode. (As...) Figure 13 As shown, when the first feed source 120 provides the first excitation signal, the first feed source 120 can also excite the first radiator 110 to generate a second current mode flowing from the first feed point 112 toward the first free end 111; as Figure 11 As shown in region D of curve S5, electronic device 10 can generate a second mode. (As...) Figure 14 As shown, when the first feed 120 provides the first excitation signal, the first feed 120 can also excite the second radiator 150 to generate a third current mode flowing from the second ground terminal 152 toward the second free terminal 151; as Figure 11 As shown in region E of curve S5, electronic device 10 can generate a third mode.

[0069] Understandable Figure 10 In the electronic device 10 of the illustrated embodiment, the first radiator 110 can generate a wider bandwidth in a first mode and simultaneously support wireless signals of the B1, B3 and B39 frequency bands; the first radiator 110 can support wireless signals of the B40 and B41 frequency bands in both a second and a third mode, and the first radiator 110 can support wireless signals of the B40 and B41 frequency bands in both the second mode as the main mode and the third mode as the auxiliary mode.

[0070] Figure 10 In the electronic device 10 of the illustrated embodiment, the first radiator 110, when supporting wireless signals in the B3 band, has an actual measured TRP of approximately 20.2 dB, an actual measured SAR value of approximately 2.02 W / kg, and an actual measured TRP after fallback of approximately 18.9 dB. When supporting wireless signals in the B1 band, the first radiator 110 has an actual measured TRP of approximately 20 dB, an actual measured SAR value of approximately 2.61 W / kg, and an actual measured TRP after fallback of approximately 18.6 dB. Compared to the scheme of the electronic device 10 in the aforementioned embodiment, which switches between the B1 and B3 bands via the first switching circuit 130, Figure 10The electronic device 10 in the illustrated embodiment has a high SAR value in the B1 band, and under the new national standard B1 band, the TRP needs to be backed down by 1.5 dB to meet the standard. The performance of the B1 band is also reduced by approximately 1.5 dB. Figure 10 The electronic device 10 of the illustrated embodiment tends to have a superior SAR value for the antenna radiator in certain frequency bands, resulting in lower radiation performance after back-off operation. However, from a production cost perspective, Figure 10 The electronic device 10 of the illustrated embodiment does not require switching between the B1 and B3 frequency bands via a first switching circuit 130 (e.g., a single-pole single-throw switch 131), resulting in lower production costs for the electronic device 10.

[0071] In this regard, please combine Figures 1 to 14 Please refer to Figure 15 , Figure 15 This is a fifth structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 may further include a third radiator 170 and a second feed source 180.

[0072] The third radiator 170 can be disposed on the side of the second ground terminal 152 of the second radiator 150 away from the second free terminal 151. The third radiator 170 includes a first end 171, a second feed point 172, and a second end 173 arranged sequentially. The first end 171 can be spaced apart from the second ground terminal 152 of the second radiator 150 and electrically connected to the grounding plane 140 to achieve grounding. The second end 173 can extend in a direction away from the second radiator 150. The second feed point 172 can be located in the middle region of the third radiator 170. For example, the ratio of the distance between the second feed point 172 and the first end 171 to the distance between the second feed point 172 and the second end 173 can be between two-thirds and three-half. The second feed source 180 can be electrically connected to the second feed point 172, and the second feed source 180 can excite the third radiator 170 to support the transmission and reception of the second wireless signal.

[0073] Understandably, please combine Figure 15 Please refer to Figure 16 , Figure 16 for Figure 15The diagram shows a first current distribution of the electronic device 10. When the second feed 180 is electrically connected to the middle of the third radiator 170, the second feed 180 can excite the third radiator 170 to generate a fourth resonant mode. This fourth resonant mode can generate a fourth resonant current I4 on the third radiator 170. The fourth resonant current I4 can flow from the second feed point 172 to the first end 171 and from the second feed point 172 to the second end 173. At this time, the area near the second feed point 172, the area near the first end 171, and the area near the second end 173 can all have a strong current distribution. The strong area of ​​the fourth resonant current I4 is more evenly distributed on the entire third radiator 170. When the third radiator 170 supports the transmission and reception of the second wireless signal, it can have both better radiation performance and a lower SAR value.

[0074] Understandably, please combine Figure 15 Please refer to Figure 17 , Figure 17 for Figure 15 The diagram shows a second current distribution of the electronic device 10. The second feed 180 can also excite the third radiator 170 to generate a fifth resonant mode, which can form a fifth resonant current I5 flowing from the first end 171 to the second end 173 on the third radiator 170. This fifth resonant mode can serve as an auxiliary resonant mode to the fourth resonant mode, so that the second feed 180 can excite the third radiator 170 to generate both the fourth resonant mode as the main radiation mode and the fifth resonant mode as the auxiliary radiation mode, and the fourth and fifth resonant modes together support the transmission and reception of the second wireless signal. For example, please refer to... Figure 18 , Figure 18 for Figure 15 The schematic diagram of an S-parameter curve of the electronic device 10 shown is composed of... Figure 18 From region F of curve S6, it can be seen that the second feed 180 can excite the third radiator 170 to generate the fourth resonant mode. From region G of curve S6, it can be seen that the second feed 180 can excite the third radiator 170 to generate the fifth resonant mode.

[0075] It is understood that, in the fourth and fifth resonant modes, the third radiator 170 may, but is not limited to, supporting a second wireless signal in a low-frequency band. Of course, the third radiator 170 may also support wireless signals in other frequency bands; this application embodiment does not limit this.

[0076] In this embodiment of the electronic device 10, the third radiator 170, under the excitation of the second feed 180, can also achieve superior radiation performance and a lower SAR value when supporting the second wireless signal. Furthermore, when the third radiator 170 forms an LB antenna, and the second radiator 150 and the first radiator 110 form an MHB antenna, the LB antenna and the MHB antenna are tuned independently, making it easy to decouple the LB band and the MHB band, thereby improving the isolation between the antennas.

[0077] In this regard, please combine Figure 15 Please refer to Figure 19 , Figure 19 for Figure 15 The diagram shows an electrical connection schematic of the electronic device 10. The second switching circuit 160 of the electronic device 10 may include one or more (two or more, which will not be described in detail below) first branches 161 and one or more second branches 162.

[0078] One end of each first branch 161 can be electrically connected to the second ground terminal 152 of the second radiator 150, and the other end of each first branch 161 can be electrically connected to the grounding plane 140 to achieve grounding. One end of each second branch 162 can be electrically connected to the first terminal 171 of the third radiator 170, and the other end of each second branch 162 can be electrically connected to the grounding plane 140 to achieve grounding. The second switching circuit 160 can conduct the electrical connection between the second ground terminal 152 of the second radiator 150 and one of the first branches 161, so that the second radiator 150 can be grounded through one of the first branches 161, thereby enabling the second radiator 150 to support the transmission and reception of the first wireless signal in the third frequency band. The second switching circuit 160 can also conduct the electrical connection between the first terminal 171 of the third radiator 170 and one of the second branches 162, so that the third radiator 170 can be grounded through one of the second branches 162, thereby enabling the third radiator 170 to support the transmission and reception of the second wireless signal. Thus, the second radiator 150 and the third radiator 170 can be grounded through different branches within the same second switching circuit 160.

[0079] It is understood that the second switching circuit 160 may further include a switching switch 163, which may include one or more input terminals and multiple output terminals, such that each first branch 161 can be connected to one output terminal and each second branch 162 can be connected to another output terminal. The switching switch 163 can control the input terminals to conduct different output terminals to achieve different branch grounding. For example, the switching switch 163 may be an SP4T switch. Of course, since the switching adjustment of the third radiator 170 and the switching adjustment of the second radiator 150 can be independent of each other, the switching switch 163 may also be a multi-pole multi-throw switch, so that at the same time, the switching switch 163 can simultaneously conduct one first branch 161 and one second branch 162. The embodiments of this application do not limit the specific structure of the second switching circuit 160.

[0080] It should be noted that the second switching circuit 160 may not include the switching switch 163. The first branch 161 and the second branch 162 can be state-adjustable circuit structures, so that the first branch 161 and the second branch 162 can have different on or off states under different parameter conditions. The specific structure of the second switching circuit 160 is not limited in the embodiments of this application.

[0081] It is understood that the second switching circuit 160 may include a first branch 161, such that when the second radiator 150 returns to ground through the first branch 161, the second radiator 150 can support the first wireless signal in a third frequency band, such as the B40 / B41 band. Of course, if the second radiator 150 needs to support more frequency bands, the second switching circuit 160 may also include multiple first branches 161, and this application embodiment does not limit this.

[0082] It is understood that when the second wireless signal includes wireless signals of multiple sub-frequency bands, the second switching circuit 160 may include multiple second branches 162. The second switching circuit 160 may also control the first terminal 171 to be grounded through different second branches 162 to realize the transmission and reception of second wireless signals of different sub-frequency bands. For example, the second switching circuit 160 may include three second branches 162. When the second switching circuit 160 switches between the three second branches 162, it can enable the third radiator 170 to support low-frequency bands B28 (703MHz to 803MHz), B5 (824MHz-894MHz), and B8 (880MHz-960MHz) to achieve low-frequency full-band coverage. Of course, the second switching circuit 160 may also include other numbers of second branches 162 to enable the third radiator 170 to support wireless signals of other frequency bands. This application embodiment does not limit this.

[0083] It is understood that the first branch 161 and the second branch 162 may include a single capacitor or inductor, or a combination of multiple capacitors and inductors. This application does not limit the specific structure of the first branch 161 and the second branch 162.

[0084] In the electronic device 10 of this application embodiment, the third radiator 170 can serve as a LB antenna and, under the action of multiple second branches 162 of the second switching circuit 160, can achieve full coverage of multiple sub-band wireless signals within the low-frequency band. The first radiator 110 and the second radiator 150 together can form an MHB antenna, and with the support of the first switching circuit 130 and the second switching circuit 160, the first radiator 110 and the second radiator 150 can achieve full coverage of mid-to-high-frequency wireless signals. Meanwhile, since the first switching circuit 130 only includes one SPST switch, its unit price is about 30% lower than that of an SP4T switch. Therefore, the electronic device 10 of this application can save costs (0.35 RMB per unit) while also maintaining antenna performance.

[0085] For the structure of the aforementioned electronic device 10, please refer to... Figure 20 , Figure 20 This is a sixth structural schematic diagram of the electronic device 10 provided in this application embodiment. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Figure 20 As shown, the electronic device 10 may also include a display screen 200, a mid-frame 300, a circuit board 400, a battery 500, and a back cover 600.

[0086] The display screen 200 is disposed on the mid-frame 300 to form the display surface of the electronic device 10 for displaying 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, among other types.

[0087] The middle frame 300 may include a side frame 310 and a middle plate 320. The side frame 310 may be a hollow frame structure forming the outer frame of the electronic device 10, and the middle plate 320 may be a thin plate or sheet structure. The middle frame 300 provides support for electronic devices or functional components in the electronic device 10, allowing the electronic devices and functional components of the electronic device 10 to be mounted together. For example, the middle frame 300 may have grooves, protrusions, through holes, or other structures to facilitate the mounting of electronic devices or functional components of the electronic device 10. It is understood that the material of the middle frame 300 may include metal or plastic.

[0088] The circuit board 400 is mounted on the mid-frame 300 for fixation and is sealed inside the electronic device 10 by the rear cover 600. The circuit board 400 may integrate a processor, as well as one or more functional components such as a headphone jack, accelerometer, gyroscope, and motor. Simultaneously, the display screen 200 can be electrically connected to the circuit board 400 to control its display via the processor on the circuit board 400.

[0089] The battery 500 is mounted on the mid-frame 300 and sealed inside the electronic device 10 by the rear cover 600. The battery 500 is electrically connected to the circuit board 400 to power the electronic device 10. The circuit board 400 may contain a power management circuit. This power management circuit distributes the voltage provided by the battery 500 to the various electronic components within the electronic device 10.

[0090] The back cover 600 is connected to the middle frame 300. For example, the back 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 back cover 600, together with the middle frame 300 and the display screen 200, seals the electronic components and functional parts of the electronic device 10 inside the electronic device 10, thereby providing protection for the electronic components and functional parts of the electronic device 10.

[0091] It is understood that the ground plane 140 in the embodiments of this application can be formed on the middle plate 320 of the rear shell 600, the circuit board 400 or the middle frame 300. For example, a conductor region with zero potential can be provided on the rear shell 600, the circuit board 400 or the middle plate 320, and the ground plane 140 can be provided on the conductor region.

[0092] It is understood that one or more of the first feed source 120, the second feed source 180, the first switching circuit 130, and the second switching circuit 160 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 electronic device 10. This application embodiment does not limit the specific placement of the above structures.

[0093] It is understood that the above are merely exemplary examples of the electronic device 10. The electronic device 10 in this application embodiment may also include components such as a camera, a sensor, and a sound-to-electric conversion device. These components can be found in the descriptions in related technologies and will not be repeated here.

[0094] In this regard, please combine Figure 20 Please refer to Figure 21 , Figure 21This is a seventh structural schematic diagram of the electronic device 10 provided in an embodiment of this application. The electronic device 10 may further include a first border 311 and a second border 312 that are interconnected.

[0095] The first border 311 and the second border 312 can be the outer borders of the middle frame 300. The first border 311 and the second border 312 can be bent and connected so that the first border 311 and the second border 312 are not collinear. The length of the first border 311 can be less than the length of the second border 312. The first border 311 can be the short border of the electronic device 10, and the second border 312 can be the long border of the electronic device 10. The first radiator 110 and the second radiator 150 can be disposed on the first border 311. A portion of the third radiator 170 can be disposed on the first border 311, and another portion of the third radiator 170 can be disposed on the second border 312.

[0096] It is understood that the electronic device 10 may also include other borders 310, such as a third border 313 and a fourth border 314. The third border 313 may be disposed opposite to the first border 311, and the fourth border 314 may be disposed opposite to the second border 312, so that the middle frame 300 may be a rectangular frame. It should be noted that the middle frame 300 may also be other shapes, and the specific structure of the middle frame 300 is not limited in this embodiment.

[0097] It is understood that the first frame 311 and the second frame 312 are conductive structures, and slots can be formed on the first frame 311 and the second frame 312 to create metal branches. The first radiator 110, the second radiator 150, and the third radiator 170 may include at least one metal branch, thus the first radiator 110 to the third radiator 170 can be frame antennas. Of course, the first radiator 110 to the third radiator 170 can also be, but are not limited to, antennas in the form of flexible printed circuit boards (FPCs) or mechanical design antennas (MDAs) connected to the first frame 311 or the second frame 312. The specific arrangement of the three radiators is not limited in the embodiments of this application.

[0098] It is understood that the first frame 311 can be the bottom frame when the user holds the electronic device 10 upright, and the second frame 312 can be the side frame when the user holds the electronic device 10 upright. Furthermore, the area between the second radiator 150 and the first radiator 110 can correspond to the USB port opened on the first frame 311, and the first frame 311 can have one less gap to form the first radiator 110 and the second radiator 150. Therefore, the first radiator 110 to the third radiator 170 of this embodiment can form a lower antenna scheme for the electronic device 10 that balances low cost and low SAR value, and the first radiator 110 and the second radiator 150 can be rationally arranged according to the appearance of the electronic device 10.

[0099] 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 electronic devices 10 such as tablet circuits, PCs, and large screens; at the same time, the antenna implementation of this application is not limited to the form of metal frame 310, and the embodiments of this application do not limit it in this regard.

[0100] 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.

[0101] The electronic devices provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electronic device, characterized in that, include: The first radiator includes a first free end, a first feed point, and a first ground end arranged in sequence. The first ground end is electrically connected to a ground plane to achieve grounding. The distance between the first feed point and the first free end is less than the distance between the first feed point and the first ground end. The first feed source is electrically connected to the first feed point; and The first switching circuit includes a single-pole single-throw switch and a load element connected in series. One end of the single-pole single-throw switch is electrically connected between the first feed source and the first feed point, and the other end is electrically connected to one end of the load element. The other end of the load element is electrically connected to the ground plane. The single-pole single-throw switch is used to disconnect the load element from the first feed source and the first feed point, so that the first feed source excites the first radiator to generate a first resonant mode that supports the first wireless signal transmission and reception in the first frequency band. The first resonant mode forms a strong resonant current region in the region near the first ground end and the region near the first free end. The single-pole single-throw switch is also used to connect the load element to the first feed point and the first feed source, so that the first feed source excites the first radiator to generate a second resonant mode that supports the transmission and reception of the first wireless signal in the second frequency band. The second resonant mode forms a strong resonant current region in the region near the first ground end, the region near the first free end and the region of the load element.

2. The electronic device according to claim 1, characterized in that, The electronic device also includes: The second radiator includes a second free end and a second ground end, wherein the second free end is spaced apart from the first free end; and A second switching circuit, one end of which is electrically connected to the second grounding terminal, and the other end of which is electrically connected to the grounding plane to achieve grounding; wherein... The second switching circuit is also used to connect the second ground terminal to the ground plane, so that the first feed excites the second radiator to generate a third resonant mode that supports the transmission and reception of the first wireless signal in the third frequency band.

3. The electronic device according to claim 2, characterized in that, When the second switching circuit connects the second grounding terminal to the grounding plane, the single-pole single-throw switch is used to connect the load element to the first feed point and the second radiator.

4. The electronic device according to claim 2, characterized in that, The first resonant mode forms a first resonant current flowing from the first ground terminal toward the first free terminal on the first radiator; The second resonant mode forms a second resonant current on the first radiator that flows from the load element and the first ground terminal toward the first free end; The third resonant mode forms a third resonant current on the second radiator that flows from the second grounded end toward the second free end.

5. The electronic device according to claim 2, characterized in that, The electronic device also includes: A third radiator includes a first end, a second feed point, and a second end arranged sequentially. The first end is spaced apart from and grounded to the second ground end. The second end extends in a direction away from the second radiator. The second feed point is located in the central region of the third radiator. The second feed source is electrically connected to the second feed point, and the second feed source is used to excite the third radiator to support the transmission and reception of the second wireless signal.

6. The electronic device according to claim 5, characterized in that, The second switching circuit includes: One or more first branches, one end of each first branch being electrically connected to the second grounding terminal, and the other end of each first branch being electrically connected to the grounding plane to achieve grounding; and One or more second branches, one end of each second branch is electrically connected to the first end, and the other end of each second branch is electrically connected to the grounding plane to achieve grounding; The second switching circuit is used to connect the second ground terminal to one of the first branches to realize the transmission and reception of the first wireless signal in the third frequency band; The second switching circuit is also used to connect the first terminal to a second branch to enable the transmission and reception of the second wireless signal.

7. The electronic device according to claim 6, characterized in that, The second wireless signal includes wireless signals of multiple sub-frequency bands, and the second switching circuit includes multiple second branches; The second switching circuit is also used to connect the first terminal to different second branches to enable the transmission and reception of the second wireless signals in different sub-frequency bands.

8. The electronic device according to claim 7, characterized in that, The second feed source is used to excite the third radiator to generate a fourth resonant mode of the main radiation mode and a fifth resonant mode of the auxiliary radiation mode, and to excite the third radiator to support the transmission and reception of the second wireless signal under the combined action of the fourth resonant mode and the fifth resonant mode; wherein, The fourth resonant mode forms a fourth resonant current on the third radiator that flows from the second feed point toward the first end and toward the second end; The fifth resonant mode forms a fifth resonant current flowing from the first end toward the second end on the third radiator.

9. The electronic device according to any one of claims 5 to 8, characterized in that, The first wireless signal is a medium-to-high frequency wireless signal; and / or, the second wireless signal is a low-frequency wireless signal.

10. The electronic device according to any one of claims 5 to 8, characterized in that, The electronic device further includes a first frame and a second frame that are bent and connected, wherein the length of the first frame is less than the length of the second frame; wherein... The first radiator and the second radiator are disposed on the first frame, and a portion of the third radiator is disposed on the first frame and another portion of the third radiator is disposed on the second frame.

11. The electronic device according to any one of claims 1 to 8, characterized in that, The load element is an inductor, and the inductance value of the inductor is no greater than 10 nanohenries.

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