Antenna device and electronic equipment

Abstract

This application provides an antenna device and electronic device. A first radiator generates a first resonance under the excitation of a first feed source to support wireless signal transmission and reception in a first frequency band. A second radiator generates a second resonance under the excitation of a second feed source. A band-stop circuit can connect the second radiator to the ground system when the first feed source excites the first radiator and the second radiator to electromagnetically couple, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator is spaced apart from the first frequency band corresponding to the first resonance. Based on this, the multiple harmonic resonance of the second resonance of the second radiator is less likely to affect the first resonance of the first radiator, and the first radiator can also maintain better radiation performance under electromagnetic coupling.

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, electronic devices such as smartphones can be folded or slid, allowing them to have both unfolded and folded states. Furthermore, electronic devices can include antenna radiators to provide mobile communication services.

[0003] The surrounding environment of the antenna radiator changes under different states of electronic devices, which leads to a decrease in the radiation performance of the antenna radiator. Summary of the Invention

[0004] This application provides an antenna device and electronic device that can guarantee the radiation performance of the antenna device under electromagnetic coupling conditions.

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

[0006] First radiator;

[0007] A first feed source is electrically connected to the first radiator. The first feed source is used to excite the first radiator to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band.

[0008] The second radiator is disposed at a distance from the first radiator;

[0009] A second feed source, electrically connected to the second radiator, is used to excite the second radiator to generate a second resonance and support the transmission and reception of wireless signals in the second frequency band; and

[0010] A resistive circuit is provided, wherein one end of the resistive circuit is electrically connected to the second radiator, and the other end is electrically connected to the ground system to achieve grounding; wherein...

[0011] When the first feed source excites the first radiator and the second radiator to electromagnetically couple, the band-stop circuit is used to connect the second radiator and the ground system, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator is spaced apart from the first frequency band.

[0012] Secondly, this application also provides an electronic device including the antenna device described above.

[0013] In the antenna device and electronic equipment of this application, under the action of a first feed source, a first radiator and a second radiator can be electromagnetically coupled. The first radiator can generate a first resonance, and the second radiator can generate a multiple harmonic resonance of the second resonance. At this time, a band-stop circuit can connect the second radiator and the ground system. The second radiator can return to ground through the band-stop circuit. The band-stop circuit can cause the multiple harmonic resonance of the second resonance generated by the second radiator under the action of the first feed source to be frequency-biased, and make the frequency band corresponding to the multiple harmonic resonance of the second resonance spaced apart from the first frequency band supported by the first resonance generated by the first radiator. Thus, under the electromagnetic coupling state, the multiple harmonic resonance of the second resonance of the second radiator will not affect the first resonance of the first radiator. The first radiator can also have better radiation performance under electromagnetic coupling. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of a first structure of the antenna device provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 The diagram shows the antenna device in another configuration.

[0017] Figure 3 for Figure 1 The diagram shows the S-parameter curves of an electronic device whose second radiator is not grounded through a resistive circuit.

[0018] Figure 4 for Figure 3 The diagram shows the S-parameter curves of an electronic device whose second radiator is grounded via a resistive circuit.

[0019] Figure 5 This is a schematic diagram of a second structure of the antenna device provided in an embodiment of this application.

[0020] Figure 6 This is a schematic diagram of a third structure of the antenna device provided in the embodiments of this application.

[0021] Figure 7 This is a schematic diagram of a fourth structure of the antenna device provided in the embodiments of this application.

[0022] Figure 8 This is a fifth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0023] Figure 9 This is a sixth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0024] Figure 10 This is a seventh structural schematic diagram of the antenna device provided in the embodiments of this application.

[0025] Figure 11 This is an eighth structural schematic diagram of the antenna device provided in the embodiments of this application.

[0026] Figure 12 This is a schematic diagram of a first structure of an electronic device provided in an embodiment of this application.

[0027] Figure 13 for Figure 12 The diagram shows a structural schematic of another form of the electronic device.

[0028] Figure 14 This is a schematic diagram of a second structure of an electronic device provided in an embodiment of this application.

[0029] Figure 15 for Figure 14 The diagram shows the structure of the electronic device in another configuration.

[0030] Figure 16 This is a schematic diagram of a third structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0031] 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.

[0032] This application provides an electronic device and an antenna device, which can realize wireless communication functions. For example, the antenna device can transmit Wireless Fidelity (Wi-Fi) signals, Global Positioning System (GPS) signals, 3rd Generation (3G), 4th Generation (4G), 5th Generation (5G), Near Field Communication (NFC) signals, Bluetooth (BT) signals, Ultra Wideband (UWB) signals, satellite signals, etc. Please refer to [link / reference]. Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a first structural embodiment of the antenna device 300 provided in this application. Figure 2 for Figure 1 The diagram shows the antenna device 300 in another configuration. The antenna device 300 includes a first radiator 310, a second radiator 320, a band-stop circuit 301, a first feed 340, and a second feed 350.

[0033] The first radiator 310 may be spaced apart from the second radiator 320. A first feed 340 may be electrically connected to the first radiator 310, and the first feed 340 may excite the first radiator 310 to generate a first resonance and support the transmission and reception of wireless signals in a first frequency band (including transmission and reception, hereinafter the same). A second feed 350 may be electrically connected to the second radiator 320, and the second feed 350 may excite the second radiator 320 to generate a second resonance and support the transmission and reception of wireless signals in a second frequency band, which may be lower than the first frequency band in the spectrum. One end of a stop circuit 301 may be electrically connected to the second radiator 320, and the other end of the stop circuit 301 may be electrically connected to the ground system 360 to achieve grounding. When the first radiator 310 and the second radiator 320 are close to each other, the first feed 340 can excite the first radiator 310 to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band. Furthermore, the excitation signal provided by the first feed 340 can be electromagnetically coupled to the second radiator 320, so that the first feed 340 can excite the first radiator 310 and the second radiator 320 to generate electromagnetic coupling, and the second radiator 320 can generate a second resonance with multiple harmonics. At this time, the band-stop circuit 301 can connect the second radiator 320 to the ground system 360, and the second radiator 320 can return to ground through the band-stop circuit 301. The multiple harmonics of the second resonance generated by the second radiator 320 can be frequency offset, so that the frequency band corresponding to the multiple harmonics of the second resonance is separated from the first frequency band. That is, the band-stop circuit 301 moves the multiple harmonics of the second resonance outside the operating frequency band (first frequency band) of the first radiator 310, thereby reducing the interference received by the first radiator 310 in supporting the first frequency band under electromagnetic coupling.

[0034] It is understood that the resistive circuit 301 may include, but is not limited to, at least one inductive load branch and at least one capacitive load branch, which may be connected in parallel between the second radiator 320 and the ground system 360.

[0035] It is understood that the ground system 360 can be the common ground of the antenna device 300 or electronic device, and the ground system 360 can be a plane or structure with zero potential. At least one of the first radiator 310, the second radiator 320, and the band-stop circuit 301 can be grounded to the ground system 360 through, but is not limited to, wires, contacts, metal springs, etc. The ground system 360 can be formed through conductors, printed circuits, or metal printed layers in the antenna device 300 or electronic device. For example, the ground system 360 can be formed on the motherboard, small board, or other carrier board of the antenna device 300 or electronic device; or, for example, the ground system 360 can also be formed on the frame of the antenna device 300 or electronic device. The specific location of the ground system 360 is not limited in the embodiments of this application.

[0036] It is understood that the first radiator 310 and the second radiator 320 can be conductor structures capable of supporting wireless signal transmission and reception. One or both of the first radiator 310 and the second radiator 320 can be, but are not limited to, straight strip structures, bent structures, sheet structures, irregular structures, etc. The specific shapes of the first radiator 310 and the second radiator 320 are not limited in this embodiment.

[0037] It is understood that the first feed 340 and the second feed 350 can be radio frequency transceivers of the antenna device 300. The first feed 340 and the second feed 350 can convert high-frequency excitation current or confined electromagnetic waves into radiated electromagnetic energy. For example, the first feed 340 can provide a first excitation current to the first radiator 310, which can excite the first radiator 310 to form a first resonance and support the transmission of wireless signals in the first frequency band; the second feed 350 can provide a second excitation current to the second radiator 320, which can excite the second radiator 320 to form a second resonance and support the transmission and reception of wireless signals in the second frequency band. At the same time, the first radiator 310 and the second radiator 320 can also capture and confine electromagnetic waves in free space and transmit them to the first feed 340 and the second feed 350 to form current signals, thereby enabling the first radiator 310 to receive wireless signals in the first frequency band and the second radiator 320 to receive wireless signals in the second frequency band.

[0038] It is understandable that the first radiator 310 can be in a close proximity to the second radiator 320, allowing them to electromagnetically couple under the excitation of the first feed source 340. Alternatively, the first radiator 310 can be in a far distance from the second radiator 320, in which case they may not be electromagnetically coupled. If the stop circuit 301 does not connect the second radiator 320 to the ground system 360, and the second radiator 320 is directly grounded without passing through the stop circuit 301 (or the second radiator 320 is grounded through other circuit structures that do not change the frequency of the second resonance's multiple harmonic resonance), when the first radiator 310 and the second radiator 320 are close together and electromagnetically coupled under the action of the first feed source 340, the second radiator 320 can generate a multiple harmonic resonance of the second resonance. In this case, in the frequency spectrum, without passing through the stop circuit 301... The frequency range of the multiple harmonic resonance generated by the grounded second radiator 320 can at least partially overlap with the frequency range of the first frequency band (including complete overlap and partial overlap). The multiple harmonic resonance of the second resonance generated by the second radiator 320 that is not grounded through the stop circuit 301 can interfere with the first resonance of the first radiator 310. The radiation performance of the first resonance of the first radiator 310 will be affected by the multiple harmonic resonance of the second resonance generated by the second radiator 320 that is not grounded through the stop circuit 301, resulting in poor radiation performance of the first radiator 310.

[0039] To avoid the influence of the multiple harmonic resonance of the second resonance generated by the second radiator 320 (not grounded through the band-stop circuit 301) on the first radiator 310, the antenna device 300 can control the band-stop circuit 301 to connect the second radiator 320 and the ground system 360 while the first radiator 310 and the second radiator 320 are electromagnetically coupled. The second radiator 320 can return to ground through the band-stop circuit 301. At this time, under the influence of the band-stop circuit 301, the frequency of the multiple harmonic resonance of the second resonance generated by the second radiator 320 can be frequency-shifted. The frequency range corresponding to the multiple harmonic resonance of the second resonance generated by the radiator 320 is frequency-biased compared to the frequency range corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 which is not grounded through the stop circuit 301. The frequency range corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 which is grounded through the stop circuit 301 can be spaced apart from the first frequency band supported by the first resonance. The multiple harmonic resonance of the second resonance generated by the second radiator 320 which is grounded through the stop circuit 301 is less likely to affect the first resonance, thus ensuring the radiation performance of the first radiator 310.

[0040] For example, the first resonant of the first radiator 310 supports wireless signals in the first frequency band B41 (2496MHz to 2690MHz), and the second resonant of the second radiator 320 supports wireless signals in the second frequency band N28 (703MHz to 803MHz). Please refer to [reference needed]. Figure 3 and Figure 4 , Figure 3 for Figure 1 The diagram shows the S-parameter curves of the antenna device 300 where the second radiator 320 is not grounded through the stop circuit 301. Figure 4 for Figure 3 The diagram shows the S-parameter curves of the antenna device 300 with the second radiator 320 grounded through the stop circuit 301. Figure 3 Curve S1 is the S-parameter curve of the second radiator 320 when it is not grounded through the stop circuit 301, and curve S2 is the S-parameter curve of the first radiator 310 when the second radiator 320 is not grounded through the stop circuit 301. Figure 4 Curve S3 is a schematic diagram of the S-parameter curve of the second radiator 320 after it is grounded through the stop circuit 301; curve S4 is the S-parameter curve of the first radiator 310 after the second radiator 320 is grounded through the stop circuit 301.

[0041] As can be seen from curves S1 and S3, whether the second radiator 320 is grounded through the stop circuit 301 or not, the S-parameters of the second radiator 320 remain basically unchanged. In other words, the setting of the stop circuit 301 has virtually no impact on the radiation performance of the second radiator 320 in supporting the second resonance. As can be seen from region A of curve S2, when the second radiator 320 is not grounded through the band-stop circuit 301, a clutter resonance is generated on the S-parameters of the first radiator 310. This clutter resonance is the third harmonic resonance of the N28 band supported by the second radiator 320. The frequency range of this third harmonic resonance falls exactly within the frequency range of the first radiator 310 supporting the B41 band (it should be noted that the frequency position of the multiple harmonic resonance is affected by factors such as antenna clearance and environmental medium, so the frequency range of the multiple harmonic resonance is not necessarily exactly a multiple of the fundamental mode resonance frequency). This causes the radiation performance of the wireless signal supported by the first radiator 310 in the B41 band to be absorbed by this multiple harmonic resonance, thus forming a clutter. In contrast, as can be seen from region B of curve S4, when the second radiator 320 is grounded through the band-stop circuit 301, and the corresponding parameters of the band-stop circuit 301 are set, the frequency of the third harmonic resonance on curve S2 will be frequency-shifted. Figure 4As can be seen, the third harmonic resonance frequency shifts to the frequency range shown in region B, around 3 GHz. The frequency range of the third harmonic resonance shown in region B shifts out of the frequency range of the first frequency band of the first resonance, such as the B41 frequency band (2.5 to 2.69 GHz). Therefore, the third harmonic resonance of the second resonance generated by the second radiator 320 grounded through the stop circuit 301 is less likely to affect the first resonance, and the radiation performance of the first radiator 310 can be guaranteed. For example, if the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, and the second radiator 320 is not grounded through the band-stop circuit 301, the radiation efficiency of the first radiator 310 supporting the B41 frequency band can be -5.5dB. If the second radiator 320 is grounded through the band-stop circuit 301, the radiation efficiency of the first radiator 310 supporting the B41 frequency band can be -4dB. The band-stop circuit 301 can increase the radiation efficiency of the first radiator 310 supporting the B41 frequency band by 1.5dB, which can ensure the radiation performance of the first radiator 310.

[0042] It is understandable that the multiple harmonic resonance of the second resonance generated by the second radiator 320 under the action of the band-stop circuit 301 is the same as the multiple harmonic frequency range of the second resonance generated when the second radiator 320 does not return to ground through the band-stop circuit 301. For example, if the multiple harmonic frequency range is the third harmonic frequency range, the multiple harmonic resonance can be the third harmonic resonance of the second resonance.

[0043] It is understandable that, since the stop circuit 301 connects the second radiator 320 to the ground system 360 or does not connect the second radiator 320 to the ground system 360, the stop circuit 301 has little effect on the second radiator 320. Therefore, the second feed source 350 can excite the second radiator 320 to generate a second resonance when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, and the second feed source 350 can also excite the second radiator 320 to generate a second resonance when the first radiator 310 and the second radiator 320 are in a far non-electromagnetic coupling state. The specific operating mode of the second feed source 350 is not limited in the embodiments of this application.

[0044] It is understandable that when the first radiator 310 and the second radiator 320 are in a non-electromagnetic coupling state with a large distance between them, the multiple harmonic resonance of the second resonance generated by the second radiator 320 is unlikely to affect the first radiator 310 due to the large distance between them. Therefore, the first feed 340, the second feed 350, the first radiator 310 and the second radiator 320 can all work normally. The second radiator 320 can support the second resonance either without grounding through the stop circuit 301 or by grounding through the stop circuit 301. When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the first feed 340 and the first radiator 310 can work normally. The second feed 350 and the second radiator 320 can either work normally, so that the second radiator 320 generates a second resonance under the excitation of the second feed 350 and transmits and receives wireless signals in the second frequency band, or the second feed 350 can not work, so that the second radiator 320 does not transmit or receive wireless signals in the second frequency band. However, the second radiator 320 can be electromagnetically coupled with the first radiator 310 under the action of the first feed 340 and generate a multi-harmonic resonance of the second resonance. The second radiator 320 can be grounded through the band-stop circuit 301 to reduce the influence of the multi-harmonic resonance of the second resonance of the second radiator 320 on the first radiator 310.

[0045] It is understandable that when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the first radiator 310 can be stacked with the second radiator 320 so that the projection of the first radiator 310 on the second radiator 320 can at least partially coincide with the second radiator 320. At this time, the multiple harmonic resonance of the second resonance generated by the second radiator 320 has a greater impact on the first radiator 310. The second radiator 320 can be grounded through the band-stop circuit 301 so that the frequency range corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 will be frequency-biased and shifted out of the range of the first frequency band corresponding to the first resonance of the first radiator 310. Of course, when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the projection of the first radiator 310 on the second radiator 320 can be completely separated from the second radiator 320, but the distance between them is relatively close. Alternatively, the first radiator 310 can be arranged in parallel with the second radiator 320 without being stacked on top of it, and the two can be arranged in parallel with a relatively close distance. In this case, the multiple harmonic resonance of the second resonance generated by the second radiator 320 will also affect the first radiator 310. The second radiator 320 can also be grounded through the stop circuit 301 to reduce the influence of the multiple harmonic resonance on the first radiator 310.

[0046] In the antenna device 300 of this application embodiment, when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the distance between the first radiator 310 and the second radiator 320 is relatively short. The antenna device 300 can control the band-stop circuit 301 to conduct the second radiator 320 and the ground system 360. The second radiator 320 can be grounded through the band-stop circuit 301. At this time, under the action of the band-stop circuit 301, the multiple harmonic resonance of the second resonance generated by the second radiator 320 under the action of the first feed 340 can be frequency-biased, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance can be separated from the first frequency band supported by the first resonance generated by the first radiator 310. Therefore, the multiple harmonic resonance of the second resonance generated by the second radiator 320 will not affect the first resonance of the first radiator 310. The first radiator 310 is not easily affected by the multiple harmonic resonance of the second radiator 320. The first radiator 310 can also ensure better radiation performance in the retracted state.

[0047] In this regard, please combine Figures 1 to 4 Please refer to Figure 5 , Figure 5 This is a second structural schematic diagram of the antenna device 300 provided in an embodiment of this application. The antenna device 300 may further include a tuning circuit 302.

[0048] One end of the tuning circuit 302 is electrically connected to the second radiator 320, and the other end is electrically connected to the ground system 360 to achieve grounding. When the first radiator 310 and the second radiator 320 are electromagnetically coupled, the tuning circuit 302 also conducts the connection between the second radiator 320 and the ground system 360, so that the first feed source 340 excites the second radiator 320 and the tuning circuit 302 to jointly generate a third resonance. The frequency band of the wireless signal supported by this third resonance may be different from the frequency band of the wireless signal supported by the first resonance, or it may be different from the frequency band of the wireless signal supported by the second resonance.

[0049] Understandably, the first resonance generated by the first radiator 310 can also support the transmission and reception of wireless signals in a third frequency band. This third frequency band may be different from the first frequency band supported by the first resonance; the two may be spaced apart in the spectrum, or they may have overlapping frequency bands but different center frequencies. The third resonance jointly generated by the second radiator 320 and the tuning circuit 302 can enhance the antenna efficiency of the third frequency band supported by the first resonance.

[0050] It is understood that both the third frequency band and the first frequency band are frequency bands supported by the first resonance of the first radiator 310. When the first feed 340 is fed with an excitation current corresponding to the wireless signal of the first frequency band, or when the electrical length of the first radiator 310 allows it to resonate at the first frequency band, the first feed 340 can excite the first radiator 310 to generate the first resonance and support the transmission and reception of wireless signals in the first frequency band. When the first feed 340 is fed with an excitation current corresponding to the wireless signal of the third frequency band, or when the electrical length of the first radiator 310 allows it to resonate at the third frequency band, the first feed 340 can excite the first radiator 310 to generate the first resonance and support the transmission and reception of wireless signals in the third frequency band. The first resonance of the first radiator 310 can support wireless signals in either the first or third frequency band under the excitation of the first feed 340.

[0051] It is understandable that the third resonance and the first resonance can also be two independent resonances. The frequency range of the third resonance can be spaced apart from the frequency range of the third frequency band supported by the first resonance, and the frequency ranges of the two are within a small interval, so that the third resonance can enhance the antenna efficiency of the first resonance supporting the third frequency band. For example, in the spectrum, the frequency range corresponding to the third resonance can be higher than the frequency range of the third frequency band, and the frequency range interval between the two can be approximately in the range of 300-800MHz. In this case, the third resonance can better enhance the antenna efficiency of the first resonance supporting the third frequency band. Understandably, as the frequency band supported by the first resonance differs, the interval between the frequency range corresponding to the third resonance and the frequency range of the third frequency band can also vary. For example, taking the third frequency band supported by the first resonance as the B3 frequency band, the frequency range corresponding to the third resonance and the frequency range of the third frequency band can be spaced approximately 300MHz to 500MHz apart. When the second radiator 320 is not grounded through the tuning circuit 302, the radiation efficiency of the first resonance supporting the B3 frequency band is approximately -5dB. When the second radiator 320 is grounded through the tuning circuit 302, the radiation efficiency of the first resonance supporting the B3 frequency band is approximately -4.5dB. Thus, by controlling the state of the tuning circuit 302, the radiation efficiency of the first resonance supporting the B3 frequency band can be improved by 0.5dB. Under the adjustment of the tuning circuit 302, the third resonance can enhance the antenna efficiency of the first resonance supporting the third frequency band.

[0052] It is understandable that when the first radiator 310 and the second radiator 320 are electromagnetically coupled, and when the first resonance of the first radiator 310 supports the transmission and reception of wireless signals in the first frequency band, the band-stop circuit 301 can connect the second radiator 320 and the ground system 360 (at this time, the tuning circuit 302 can disconnect the second radiator 320 and the ground system 360). The band-stop circuit 301 can shift the frequency range of the multiple harmonic resonance of the second resonance of the second radiator 320 out of the frequency band range supported by the first resonance. The multiple harmonic resonance is far from the frequency range of the first frequency band, and the multiple harmonic resonance is less likely to interfere with the radiation performance of the first resonance supporting the first frequency band. It is also understandable that at this time, the second radiator 320 can also generate a fifth resonance with the band-stop circuit 301. The frequency band of the wireless signal supported by this fifth resonance may be different from the frequency band of the wireless signal supported by the first resonance or the second resonance. The fifth resonance can widen the bandwidth of the antenna device 300.

[0053] Understandably, when the first radiator 310 and the second radiator 320 are electromagnetically coupled, and the first resonance of the first radiator 310 supports the transmission and reception of wireless signals in the third frequency band, the tuning circuit 302 can connect the second radiator 320 and the ground system 360 (at this time, the band-stop circuit 301 can disconnect the connection between the second radiator 320 and the ground system 360). The tuning circuit 302 can generate a third resonance together with the second radiator 320, which can enhance the antenna efficiency of the first resonance supporting the third frequency band.

[0054] For example, please refer to again Figure 4 As shown in curve S4, when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the first feed 340 can excite the second radiator 320 to generate the multi-harmonic resonance of the second resonance shown in region B of curve S4. The first feed 340 can also excite the second radiator 320 and the tuning circuit 302 to jointly generate the third resonance in region C of curve S4. The first feed 340 can excite the first radiator 310 to generate the first resonance shown in region D of curve S4. When the first resonance supports the wireless signal of the first frequency band, the band-stop circuit 301 is grounded, causing the multi-harmonic resonance of the second resonance generated by the second radiator 320 to have a frequency offset and shift out of the first frequency band range, which can reduce the influence of the multi-harmonic resonance on the first resonance. At this time, the fifth resonance jointly generated by the second radiator 320 and the band-stop circuit 301 can widen the bandwidth of the antenna device 300. When the first resonance supports the wireless signal of the third frequency band, the third resonance generated by the second radiator 320 and the tuning circuit 302 can enhance the antenna efficiency when the first resonance supports the third frequency band, and the radiation performance of the first resonance is better.

[0055] It is understood that the tuning circuit 302 may include, but is not limited to, a circuit structure formed by connecting at least one capacitor, an inductor, a switch, etc., in series or in parallel. Any structure of the tuning circuit 302 that can generate a third resonance that enhances the third frequency band under the excitation of the first feed source 340 and the second radiator 320 is within the protection scope of the embodiments of this application.

[0056] It is understood that the antenna device 300 may include a switching circuit electrically connected to the first radiator 310. This switching circuit can change the electrical length of the first radiator 310, so that the first feed 340 can excite the first radiator 310 to support a first frequency band or a third frequency band at different electrical lengths. The electrical length of the radiator refers to its length when radiating a signal, and the electrical length of the radiator can be greater than, less than, or equal to its branch length. The electrical length of the radiator can be related to the frequency it supports; when the electrical length of the radiator is longer, it can support lower frequency wireless signals; when the electrical length of the radiator is shorter, it can support higher frequency wireless signals. The radiator can change its electrical length by electrically connecting circuits with different impedances. It should be noted that the antenna device 300 may also exclude the switching circuit and instead adjust the characteristics of the excitation current fed into the first radiator 310 by the first feed 340, so that the first resonance of the first radiator 310 supports the first frequency band or the third frequency band. This application embodiment does not limit the specific manner in which the first resonance supports the first frequency band or the third frequency band.

[0057] It is understandable that when the second radiator 320 returns to ground through the band-stop circuit 301, the parameters of the band-stop circuit 301 can be adjusted so that, under the excitation of the first feed source 340, the multiple harmonic resonance of the second resonance generated by the second radiator 320 produces a frequency deviation, and the frequency band corresponding to the multiple harmonic resonance of the second resonance is separated from the first frequency band corresponding to the first resonance. Alternatively, the second radiator 320 can jointly generate a fifth resonance with the band-stop circuit 301. Or, the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 can both produce a frequency deviation and be separated from the first frequency band, and the second radiator 320 can also jointly generate a fifth resonance with the band-stop circuit 301. Among these, the fifth resonance and the multiple harmonic resonance of the second resonance can be two independent resonances.

[0058] The antenna device 300 of this embodiment includes a band-stop circuit 301 and a tuning circuit 302. The antenna device 300 can switch between the band-stop circuit 301 connecting the second radiator 320 and the ground system 360, and the tuning circuit 302 connecting the second radiator 320 and the ground system 360. The band-stop circuit 301 can cause the multiple harmonic resonance of the second resonance generated by the second radiator 320 to generate a frequency offset, and make the frequency band corresponding to the multiple harmonic resonance of the second resonance spaced apart from the first frequency band of the first resonance. The multiple harmonic resonance of the second resonance can reduce the impact on the radiation performance when the first resonance supports the first frequency band. The tuning circuit 302 can generate a third resonance together with the second radiator 320. The third resonance can enhance the antenna efficiency when the first resonance supports the third frequency band. Therefore, the antenna device 300 of this embodiment can ensure that the first resonance supports the radiation performance of the first frequency band under electromagnetic coupling state, and can also ensure that the first resonance supports the radiation performance of the third frequency band under electromagnetic coupling state, and the radiation performance of the first radiator 310 is better.

[0059] In this regard, please combine Figures 1 to 5 Please refer to Figure 6 , Figure 6 This is a schematic diagram of a third structure of the antenna device 300 provided in an embodiment of this application. The band-stop circuit 301 may include a first inductive load branch 331 and a first capacitive load branch 332.

[0060] One end of the first inductive load branch 331 can be directly or indirectly connected to the second radiator 320, and the other end of the first inductive load branch 331 can be directly or indirectly connected to the ground system 360 to achieve grounding. One end of the first capacitive load branch 332 can be directly or indirectly connected to the second radiator 320, and the other end of the first capacitive load branch 332 can be directly or indirectly connected to the ground system 360 to achieve grounding.

[0061] Understandably, an inductive load branch refers to a circuit or structure that allows current to flow, but the current lags behind the voltage. Inductive load branches primarily use inductive reactance components (such as inductors) as the main load. In AC circuits, when current flows through an inductor, an induced electromotive force is generated within the inductor, leading to the storage and release of energy in the circuit; hence, it is called an inductive load. Typical inductive loads include components such as transformers and inductors. The first inductive load branch 331 may, but is not limited to, include one or more inductive components.

[0062] Understandably, a capacitive load branch refers to a circuit or structure that can impede the flow of current, but where the current leads the voltage. A capacitive load branch primarily uses capacitors as the main load. In an AC circuit, when voltage is applied to a capacitor, the capacitor accumulates charge, forming an electric field, and releases charge when the voltage changes; hence, it is called a capacitive load. A typical capacitive load includes a capacitor. The first capacitive load branch 332 may, but is not limited to, include one or more capacitors.

[0063] It is understandable that when the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the first capacitive load branch 332 can conduct the connection between the second radiator 320 and the ground system 360. At this time, the first capacitive load branch 332 and the first inductive load branch 331 can jointly form a band-stop circuit 301. The band-stop circuit 301 can adjust the frequency range of the multiple harmonic resonance of the second resonance generated by the second radiator 320, so that the frequency range of the multiple harmonic resonance is shifted out of the frequency range of the first resonance, and the multiple harmonic resonance is less likely to affect the radiation performance of the first resonance.

[0064] Understandably, when the first radiator 310 and the second radiator 320 are in a non-electromagnetically coupled state with a considerable distance between them, the first capacitive load branch 332 can connect the second radiator 320 to the ground system 360. Even if the second radiator 320 generates a multiple harmonic resonance of the second resonance, this multiple harmonic resonance is unlikely to affect the second resonance because its frequency range is far from the second resonance. Of course, when the first radiator 310 and the second radiator 320 are in a non-electromagnetically coupled state with a considerable distance between them, the first capacitive load branch 332 can also disconnect the second radiator 320 from the ground system 360. In this case, the first inductive load branch 331 does not form a band-stop circuit 301 with the first capacitive load branch 332, and the first inductive load branch 331 can adjust the frequency range of the second frequency band of the second resonance generated by the second radiator 320.

[0065] It is understood that the band-stop circuit 301 may also include a switching element to control the first capacitive load branch 332 to connect the second radiator 320 and the ground system 360, or to control the first capacitive load branch 332 to disconnect the connection between the second radiator 320 and the ground system 360. Of course, the band-stop circuit 301 may also not include a switching element, and the first capacitive load branch 332 may be designed with adjustable parameters, such that the first capacitive load branch 332 connects the second radiator 320 and the ground system 360 under a first parameter condition and disconnects the connection under a second parameter condition. The embodiments of this application do not limit the specific structure of the band-stop circuit 301.

[0066] The band-stop circuit 301 of this embodiment includes a first inductive load branch 331 and a first capacitive load branch 332. This band-stop circuit 301 can be applied to a structure where the first resonant of the first radiator 310 supports a first frequency band but not a third frequency band. When both the first inductive load branch 331 and the first capacitive load branch 332 are grounded, the band-stop circuit 301 ensures that the multiple harmonic resonances of the second resonant of the second radiator 320 do not affect the radiation performance of the first resonant of the first radiator 310. When the first capacitive load branch 332 is disconnected from the ground system 360, the first inductive load branch 331 can adjust the range of the second frequency band supported by the second resonant. Therefore, the band-stop circuit 301 can achieve multiple functions, and its simple structure reduces production costs.

[0067] In this regard, please combine Figure 6 Please refer to Figure 7 , Figure 7 This is a fourth structural schematic diagram of the antenna device 300 provided in the embodiments of this application. The antenna device 300 may further include at least one second capacitive load branch 333 and a first switching switch 334.

[0068] The first switching switch 334 includes a first input terminal a1, a first output terminal b1, and at least one second output terminal b2. The first input terminal a1 is directly or indirectly electrically connected to the second radiator 320. One end of the first capacitive load branch 332 is electrically connected to the ground system 360 to achieve grounding, and the other end of the first capacitive load branch 332 is electrically connected to the first output terminal b1 of the first switching switch 334. One end of each second capacitive load branch 333 is electrically connected to the ground system 360 to achieve grounding, and the other end of each second capacitive load branch 333 is used to electrically connect to one of the second output terminals b2 of the first switching switch 334.

[0069] When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, if the first feed 340 excites the first radiator 310 to generate a first resonance that supports the wireless signal transmission and reception of the first frequency band, then the first switching switch 334 can connect the first input terminal a1 and the first output terminal b1. At this time, the first inductive load branch 331 and the first capacitive load branch 332 are connected in parallel and both can connect the second radiator 320 and the ground system 360. The first inductive load branch 331 and the first capacitive load branch 332 can form a band-stop circuit 301. The first feed 340 can excite the second radiator 320 to generate a multi-harmonic resonance of the second resonance. The band-stop circuit 301 can make the frequency range of the multi-harmonic resonance of the second resonance shift out of the frequency band range supported by the first resonance. The multi-harmonic resonance of the second resonance is less likely to interfere with the radiation performance of the first resonance supporting the first frequency band.

[0070] When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, if the first feed 340 excites the first radiator 310 to generate a first resonance that supports the transmission and reception of wireless signals in the third frequency band, then the first switching switch 334 can connect the first input terminal a1 and the second output terminal b2. At this time, the first inductive load branch 331 and the second capacitive load branch 333 can be connected in parallel, and both can connect the second radiator 320 and the ground system 360. The first inductive load branch 331 and the second capacitive load branch 333 can form a tuning circuit 302, and under the excitation of the first feed 340, the tuning circuit 302 can generate a third resonance together with the second radiator 320. This third resonance can enhance the antenna efficiency of the first resonance supporting the third frequency band.

[0071] It is understood that the first switching switch 334 may be, but is not limited to, a single-pole multi-throw switch element, or the first switching switch 334 may also include multiple single-pole single-throw switch elements. The specific structure of the first switching switch 334 in the embodiments of this application is not limited.

[0072] It is understandable that the capacitance values ​​of the first capacitive load branch 332 and the second capacitive load branch 333 are different, so that the first capacitive load branch 332 and the first inductive load branch 331 can form a band-stop circuit 301 associated with the first frequency band of the first resonance, and the second capacitive load branch 333 and the first inductive load branch 331 can form a tuning circuit 302 associated with the third frequency band of the first resonance.

[0073] Understandably, when the third frequency band includes multiple sub-frequency bands and the first resonance of the first radiator 310 can support wireless signals of the third frequency band in different sub-frequency bands, the first switching switch 334 can switch between multiple second capacitive load branches 333, so that different second capacitive load branches 333 can conduct the second radiator 320 and the ground system 360. Thus, different second capacitive load branches 333 can cooperate with the first inductive load branch 331 to form a third resonance adapted to the first resonance of different sub-frequency bands, so that the third resonance can enhance the antenna efficiency of the first resonance supporting the wireless signal of the current sub-frequency band.

[0074] Understandably, when the first input terminal a1 of the first switch 334 is not connected to any output terminal, causing the first switch 334 to be in an open (or closed) state, the second radiator 320 can be grounded through the first inductive load branch 331. The first inductive load branch 331 can adjust the frequency of the second frequency band supported by the second resonance generated by the second radiator 320, so as to adjust the frequency of the wireless signal supported by the second radiator 320.

[0075] The antenna device 300 of this embodiment includes a first inductive load branch 331, a first switching switch 334, a first capacitive load branch 332, and at least one second capacitive load branch 333. The first inductive load branch 331 and the first capacitive load branch 332 can form a band-stop circuit 301, which can cause the multiple harmonic resonance of the second resonance generated by the second radiator 320 to produce a frequency offset, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance is separated from the first frequency band corresponding to the first resonance, thereby reducing the impact on the first frequency band supported by the first resonance of the first radiator 310. The first inductive load branch 331 and at least one second capacitive load branch 333 can also form a tuning circuit 302, and the second radiator 320 and the tuning circuit 302 The first inductive load branch 331 can be multiplexed to generate a third resonance and enhance the antenna efficiency of the first resonance supporting the third frequency band. This simplifies the circuit structure. Furthermore, the first inductive load branch 331 can also adjust the frequency range of the second frequency band supported by the second radiator 320. Moreover, when the first switching switch 334 switches between the first capacitive load branch 332 and the second capacitive load branch 333, these branches do not easily affect the frequency range of the second frequency band supported by the second radiator 320. Any on or off operation of the first switching switch 334 does not easily affect the second frequency band supported by the second radiator 320, thus ensuring the performance of the second radiator 320 in supporting the second frequency band. Based on this, the antenna device 300 of this embodiment has a simple structure and diverse functions, and is particularly suitable for antenna devices 300 where the first radiator 310 and the second radiator 320 can be electromagnetically coupled.

[0076] Please refer to the following: Figure 8 , Figure 8 This is a fifth structural schematic diagram of the antenna device 300 provided in the embodiments of this application. The antenna device 300 further includes a third capacitive load branch 335, a second switching switch 336, a second inductive load branch 337, and at least one third inductive load branch 338. The third capacitive load branch 335 and the second inductive load branch 337 can form a band-stop circuit 301, and the third capacitive load branch 335 and at least one third inductive load branch 338 can form a tuning circuit 302, thereby enabling the third capacitive load branch 335 to be multiplexed.

[0077] One end of the third capacitive load branch 335 is directly or indirectly connected to the second radiator 320, and the other end of the third capacitive load branch 335 is electrically connected to the ground system 360 to achieve grounding. The third capacitive load branch 335 can conduct the electrical connection between the second radiator 320 and the ground system 360. The second switching switch 336 includes a second input terminal a2, a third output terminal b3, and at least one fourth output terminal b4. The second input terminal a2 is directly or indirectly connected to the second radiator 320. One end of the second inductive load branch 337 is directly or indirectly connected to the ground system 360 to achieve grounding, and the other end of the second inductive load branch 337 is directly or indirectly connected to the third output terminal b3. One end of each third inductive load branch 338 is directly or indirectly connected to the ground system 360 to achieve grounding, and the other end of each third inductive load branch 338 is directly or indirectly connected to a fourth output terminal b4.

[0078] When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, if the first feed 340 excites the first radiator 310 to generate a first resonance that supports the wireless signal transmission and reception of the first frequency band, then the second switching switch 336 can connect the second input terminal a2 and the third output terminal b3. At this time, the third capacitive load branch 335 and the second inductive load branch 337 are connected in parallel and both can connect the second radiator 320 and the ground system 360. The third capacitive load branch 335 and the second inductive load branch 337 can form a band-stop circuit 301. The first feed 340 can excite the second radiator 320 to generate a multi-frequency resonance of the second resonance. The band-stop circuit 301 can make the frequency range of the multi-frequency resonance of the second resonance shift out of the frequency band range supported by the first resonance. The multi-frequency resonance of the second resonance is less likely to interfere with the radiation performance of the first resonance supporting the first frequency band.

[0079] When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, if the first feed 340 excites the first radiator 310 to generate a first resonance that supports the transmission and reception of wireless signals in the third frequency band, then the second switching switch 336 can connect the second input terminal a2 and a fourth output terminal b4. At this time, the third capacitive load branch 335 and the third inductive load branch 338 can be connected in parallel, and both can connect the second radiator 320 and the ground system 360. The third capacitive load branch 335 and the third inductive load branch 338 can form a tuning circuit 302, and under the excitation of the first feed 340, the tuning circuit 302 can generate a third resonance together with the second radiator 320. This third resonance can enhance the antenna efficiency of the first resonance supporting the third frequency band.

[0080] It is understood that the second switching switch 336 may be, but is not limited to, a single-pole multi-throw switch element, or the second switching switch 336 may also include multiple single-pole single-throw switch elements. The specific structure of the second switching switch 336 in the embodiments of this application is not limited.

[0081] It is understandable that the inductance values ​​of the second inductive load branch 337 and the third inductive load branch 338 are different, so that the second inductive load branch 337 and the third capacitive load branch 335 can form a band-stop circuit 301 associated with the first frequency band of the first resonance, and the third inductive load branch 338 and the third capacitive load branch 335 can form a tuning circuit 302 associated with the third frequency band of the first resonance.

[0082] Understandably, when the third frequency band includes multiple sub-frequency bands and the first resonance of the first radiator 310 can support wireless signals of the third frequency band in different sub-frequency bands, the second switching switch 336 can switch between multiple third inductive load branches 338, so that different third inductive load branches 338 can conduct the second radiator 320 and the ground system 360. Thus, different third inductive load branches 338 can cooperate with the third capacitive load branch 335 to form a third resonance adapted to the first resonance of different sub-frequency bands, so that the third resonance can enhance the antenna efficiency of the first resonance supporting the wireless signal of the current sub-frequency band.

[0083] Understandably, the third capacitive load branch 335 can also be connected or disconnected from the second radiator 320 and the ground system 360 by means of a switching element. For example, one end of the third capacitive load branch 335 can be grounded, and the other end can be connected to the second radiator 320 through a switching element. When the first radiator 310 and the second radiator 320 are in a close electromagnetic coupling state, the second switching switch 336 can conduct the second inductive load branch 337 or a third inductive load branch 338 to electrically connect with the second radiator 320 and the ground system 360. At this time, the third capacitive load branch 335 can disconnect from the second radiator 320 under the action of the switching element. When the first radiator 310 and the second radiator 320 are in a far non-electromagnetic coupling state, the third capacitive load branch 335 can conduct the electrical connection with the second radiator 320 under the action of the switching element. At this time, the second switching switch 336 can conduct the second inductive load branch 337 or a third inductive load branch 338 to electrically connect with the second radiator 320 and the ground system 360.

[0084] The antenna device 300 of this embodiment includes a third capacitive load branch 335, a second switching switch 336, a second inductive load branch 337, and at least one third inductive load branch 338. The antenna device 300 can cause the multiple harmonic resonance of the second resonance generated by the second radiator 320 to generate a frequency offset, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance is separated from the first frequency band corresponding to the first resonance, thereby reducing the impact on the first frequency band supported by the first resonance of the first radiator 310. The antenna device 300 can also cause the second radiator 320 and part of the band-stop circuit 301 to jointly generate a third resonance, thereby enhancing the antenna efficiency of the first resonance supporting the third frequency band. Furthermore, when the second switching switch 336 switches between the second inductive load branch 337 and at least one third inductive load branch 338, the second inductive load branch 337 and the third inductive load branch 338 can adjust the frequency range of the second frequency band supported by the second radiator 320, thereby expanding the bandwidth of the second frequency band. Based on this, the antenna device 300 of the present application embodiment has a simple structure and diverse functions, and is particularly suitable for antenna devices 300 with electromagnetic coupling.

[0085] Please refer to the following: Figure 9 , Figure 9 This is a sixth structural schematic diagram of the antenna device 300 provided in the embodiments of this application. The antenna device 300 may further include a matching circuit 370.

[0086] The matching circuit 370 can be a matching network or a tuning network. The matching circuit 370 is connected in series between the second feed 350 and the second radiator 320. The matching circuit 370 can adjust the frequency range of the second frequency band. The band-stop circuit 301 can also adjust the frequency range of the second frequency band. The matching circuit 370 and the band-stop circuit 301 can jointly adjust the frequency range of the second frequency band.

[0087] For example, the second radiator 320 may further include a third free end 321, a second feed point 322, and a second ground point 323 arranged in sequence. One end of the matching circuit 370 may be electrically connected to the second feed point 322, and the other end of the matching circuit 370 may be electrically connected to the second feed source 350. One end of the stop circuit 301 or the tuning circuit 302 may be electrically connected to the second ground point 323, and the other end of the stop circuit 301 or the tuning circuit 302 may be electrically connected to the ground system 360 to achieve grounding. When the second radiator 320 is grounded through the stop circuit 301 or the tuning circuit 302, the second resonance generated by the excitation of the second feed source 350 can form a second resonant current flowing from the second ground point 323 to the third free end 321 on the second radiator 320.

[0088] Understandably, the second resonance allows the second radiator 320 to support the second frequency band in a one-sixth wavelength mode. At this time, the second resonant current can flow from the second grounding point 323 to the third free end 321. The electrical length of the second radiator 320 can be approximately equal to one-sixth of the wavelength of the second frequency band. The shorter length of the second radiator 320 allows for miniaturized design of the second radiator 320.

[0089] It should be noted that the above is merely an exemplary description of the structure and resonant mode of the second radiator 320, and is not limited thereto. For example, but not limited to, the second radiator 320 may include a main radiating branch and a parasitic radiating branch, or the second radiator 320 may generate a second resonance in a quarter-wavelength mode. This application does not limit the specific structure and resonant mode of the second radiator 320.

[0090] It is understood that the matching circuit 370, together with the band-stop circuit 301 or the tuning circuit 302, can change the electrical length of the second radiator 320, so that the matching circuit 370, together with the band-stop circuit 301 or the tuning circuit 302, can adjust the frequency range of the second radiator 320 when it supports the second frequency band. For example, the matching circuit 370 can adjust the frequency range of the second frequency band together with the first inductive load branch 331; as another example, the matching circuit 370 can adjust the frequency range of the second frequency band together with the second inductive load branch 337 or the third inductive load branch 338.

[0091] It is understood that, under the action of the matching circuit 370 and the band-stop circuit 301, the second radiator 320 can, but is not limited to, support low-frequency wireless signals. For example, the second resonance of the second radiator 320 can support low-frequency signals in the N28 band or the B28 band (703MHz to 803MHz). Of course, the second radiator 320 can also support wireless signals in other frequency bands, for example, but not limited to, the second resonance of the second radiator 320 can support the B5 band (824MHz-894MHz), the B8 band (880MHz-960MHz), the N5 band (824MHz-894MHz), or the N8 band (880MHz-960MHz). This application embodiment does not limit the frequency band supported by the second resonance of the second radiator 320.

[0092] It is understood that the matching circuit 370 may include, but is not limited to, a structure formed by connecting one or more capacitors, inductors, switches, or other components in series or parallel. For example, the matching circuit 370 may include an inductor.

[0093] Understandably, the first radiator 310 is also used to generate a fourth resonance, the frequency band of which the fourth resonance supports a wireless signal different from the frequency band of the first resonance. When the band-stop circuit 301 includes a first inductive load branch 331 and a first capacitive load branch 332, the capacitance value of the first capacitive load branch 332 can be within a first preset range. This allows the first switching switch 334 to connect the first input terminal a1 and the first output terminal b1, resulting in a frequency band corresponding to the multiple harmonic resonance of the second resonance that is spaced apart from the first frequency band and from the frequency band of the wireless signal supported by the fourth resonance. The specific value of this first preset range can be adapted to the frequency band supported by the first frequency band and the fourth resonance.

[0094] It is understandable that when the band-stop circuit 301 and the tuning circuit 302 multiplex the first inductive load branch 331, the inductance value of the first inductive load branch 331 can be within a second preset range. This allows the first switching switch 334 to connect the first input terminal a1 and a second output terminal b2. In this case, the first feed source 340 excites the second radiator 320 and the tuning circuit 302 to generate a third resonance, which enhances the antenna efficiency of the first resonance supporting the third frequency band. The specific value of this second preset range can be adapted to the third frequency band supported by the first resonance.

[0095] For example, when the matching circuit 370 includes a first inductor L1, the band-stop circuit 301 includes a second inductor L2 (e.g., the first inductive load branch 331 includes the second inductor L2), a first capacitor C1 (e.g., the first capacitive load branch 332 includes the first capacitor C1), a second capacitor C2, a third capacitor C3, a fourth capacitor C4 (e.g., multiple second capacitive load branches 333 include the second capacitor C2, the third capacitor C3, and the fourth capacitor C4)..., the antenna device 300 can determine the total inductance value of the first inductor L1 and the second inductor L2 based on the target frequency band supported by the second resonance generated by the second radiator 320 excited by the second feed 350 and the length of the second radiator 320, so that the frequency range of the second frequency band supported by the second resonance generated by the second radiator 320 is within the target frequency band range. Then, the antenna device 300 can determine the required offset for the multiple harmonic resonance of the second resonance based on the first frequency band supported by the first resonance generated by the first radiator 310, so that the frequency band range of the multiple harmonic resonance is spaced apart from the first frequency band. The antenna device 300 can determine the capacitance value of the first capacitor element C1 based on this offset. Then, the antenna device 300 can determine the inductance value of the second inductor element L2 that is matched with the capacitance value of the first capacitor element C1, and determine the inductance value of the first inductor element L1 based on the inductance value of the second inductor element L2. Next, the antenna device 300 can also select a capacitor element from the second capacitor element C2, the third capacitor element C3, and the fourth capacitor element C4 based on the third frequency band supported by the first resonance generated by the first radiator 310, so that the capacitance value of the capacitor element matched with the second inductor element L2 can enhance the antenna efficiency of the third frequency band supported by the first resonance. Furthermore, the antenna device 300 can design the corresponding capacitance values ​​of the second capacitor element C2, the third capacitor element C3, and the fourth capacitor element C4 based on the different third frequency bands supported by the first resonance.

[0096] Understandably, the matching circuit 370 can also perform impedance matching adjustment on the excitation signal provided by the second feed 350. Impedance refers to the resistance to the excitation current in a circuit. When the internal resistance of the signal source is equal in magnitude and phase to the characteristic impedance of the transmission line, or when the characteristic impedance of the transmission line is equal in magnitude and phase to the impedance of the connected load, the input or output end of the transmission line is said to be in an impedance-matched state, or simply impedance matching.

[0097] The antenna device 300 of this application embodiment includes a matching circuit 370. The matching circuit 370 can adjust the range of the second frequency band supported by the second resonance together with the band-stop circuit 301 or the tuning circuit 302, and can also adjust the impedance matching of the second resonance, so that the radiation performance of the second resonance is better.

[0098] Specifically, when the first radiator 310 can generate a fourth resonance, the first radiator 310 can generate the first resonance alone, the fourth resonance alone, or both simultaneously. For example, the excitation signal provided by the first feed source 340 can either support the first radiator 310 in forming a resonant current path and generating the first resonance at the frequency band supported by the first resonance, or it can form another resonant current at the frequency band supported by the fourth resonance and generate the fourth resonance.

[0099] For example, please refer to again Figure 4 The first feed source 340 can excite the first radiator 310 to generate the first resonance shown in region D of curve S4, and can also simultaneously excite the first radiator 310 to generate the fourth resonance shown in region E of curve S4.

[0100] It is understood that the wireless signals supported by the first and fourth resonances can be far apart in the spectrum. For example, the first resonance can support, but is not limited to, mid-to-high frequency bands, and the fourth resonance, as a parasitic resonance of the first resonance, can support, but is not limited to, high frequency bands. The first radiator 310 can support wireless signals in the mid-to-high frequency bands, and the first radiator 310 can be a mid-to-high frequency antenna radiator. For example, under the action of the first and fourth resonances, the first radiator 310 can support, but is not limited to, the B41 band, the N41 band (2496MHz-2690MHz), the 5G Wi-Fi band (5725MHz-5850MHz), the N79 band (4800MHz-4900MHz), and the B79 band (4800MHz-4900MHz). Of course, the first and fourth resonances can also support different other frequency bands, and this application embodiment does not limit this.

[0101] Understandably, the band-stop circuit 301 allows the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 to be spaced apart from the frequency band supported by the fourth resonance, so as to avoid the multiple harmonic resonance of the second resonance affecting the fourth resonance. Of course, the frequency band corresponding to the multiple harmonic resonance of the second resonance can also be spaced apart from the third frequency band supported by the first resonance, so as to avoid the multiple harmonic resonance of the second resonance affecting the third frequency band supported by the first resonance.

[0102] For example, the first frequency band supported by the first resonance of the first radiator 310 may be the B41 frequency band, the frequency band supported by the fourth resonance of the first radiator 310 may be the N78 frequency band, and the second frequency band supported by the second resonance of the second radiator 320 may be the N28 frequency band. The band-stop circuit 301 may include at least a first inductive load branch 331 and a first capacitive load branch 332. The first inductive load branch 331 may include a second inductor L2, and the first capacitive load branch 332 may include a first capacitor C1. The first capacitor C1 can be adjusted to a suitable capacitance value so that the second inductor L2 and the first capacitor C1 can shift the multiple harmonic resonance of the second resonance generated by the second radiator 320 under the excitation of the first feed source 340 out of the B41 frequency band and avoid affecting the B41 frequency band. Furthermore, it should be noted that in order to ensure that the multiple harmonic resonance of the second resonance does not affect the B41 and N78 frequency bands, the multiple harmonic resonance of the second resonance can only be moved to the range of 2.7GHz to 3.3GHz. Among them, the 3GHz frequency band is far away from the B41 and N78 frequency bands, and has a relatively small impact on these two frequency bands. Therefore, the capacitance value of the first capacitor element can be limited. In this case, the capacitance value of the first capacitor element C1 can be between 0.3 picofarads (pF) and 1.4 picofarads (pF). When it exceeds this range, although the multiple harmonic resonance of the second resonance can be moved out of the B41 band, the multiple harmonic resonance of the second resonance is too close to the B41 band or the N78 band, and the multiple harmonic resonance of the second resonance can easily affect the efficiency of the B41 band or the N78 band. When the capacitance value of the first capacitor element C1 can be between 0.3 picofarads (pF) and 1.4 picofarads (pF), the frequency band corresponding to the multiple harmonic resonance of the second resonance can be far away from both the B41 band and the N78 band, and the influence of the multiple harmonic resonance of the second resonance on the wireless signals of the B41 band and the N78 band can be avoided. Furthermore, since the second inductor L2 can generate a third resonance that enhances the third frequency band with the second capacitive load branch 333 of the band-stop circuit 301, the inductance value of the second inductor L2 can be controlled below 3 nanohenries (nH) to avoid the third resonance being too close to or below the B3 frequency band, so that the third resonance cannot play a role in improving the intermediate frequency efficiency.

[0103] The first radiator 310 in this embodiment can generate a first resonance and a fourth resonance, support more frequency bands of wireless signals, and realize more communication functions.

[0104] Please refer to the following: Figure 10 , Figure 10 This is a seventh structural schematic diagram of the antenna device 300 provided in an embodiment of this application. The first radiator 310 may include a first radiating stub 311 and a second radiating stub 312.

[0105] The first radiating stub 311 includes a first grounding terminal 3111, a first feed point 3112, and a first free end 3113 arranged sequentially. The first grounding terminal 3111 is electrically connected to the ground system 360 to achieve grounding. The second radiating stub 312 is spaced apart from the first radiating stub 311 on the side of the first free end 3113 away from the first grounding terminal 3111. The second radiating stub 312 may include a second grounding terminal 3121 and a second free end 3122. The second free end 3122 may be spaced apart from the first free end 3113 of the first radiating stub 311. The second grounding terminal 3121 may extend in a direction away from the first radiating stub 311. The first feed source 340 may be directly or indirectly electrically connected to the first feed point 3112 of the first radiating stub 311. The first feed source 340 may excite the first radiating stub 311 to generate a first resonance and may at least excite the second radiating stub 312 to generate a fourth resonance. The second radiating stub 312 may serve as a parasitic stub of the first radiating stub 311.

[0106] Understandably, the excitation signal provided by the first feed 340 can generate a resonant current on the first radiating stub 311. Part of the resonant current can flow on the first radiating stub 311 and form a resonant current path to excite the first radiating stub 311 to generate a first resonance and support wireless signals in the first or third frequency band. Another part of the resonant current can be electromagnetically coupled to the second radiating stub 312 and can flow on the second radiating stub 312 to form another resonant current path. This resonant current path can excite the second radiating stub 312 to generate a fourth resonance.

[0107] It is understandable that when the fourth resonance is mainly generated by the excitation of the second radiating stub 312, the contribution rate of the first radiating stub 311 to the fourth resonance can be ignored, and the first feed 340 can excite the second radiating stub 312 to generate the fourth resonance; when the first radiating stub 311 has a certain contribution rate to the fourth resonance, the first feed 340 can excite the second radiating stub 312 as the main radiating stub and the first radiating stub 311 as the auxiliary radiating stub to jointly generate the fourth resonance. The embodiments of this application do not limit the formation method of the fourth resonance.

[0108] Understandably, the distance between the second grounding terminal 3121 of the second radiating stub 312 and the first free terminal 3113 of the first radiating stub 311 can be relatively close, so that the length between the second free terminal 3122 of the second radiating stub 311 and the second grounding terminal 3121 of the first radiating stub 312 is relatively short. The second radiating stub 312 is more likely to electromagnetically couple with the first radiating stub 311, and the fourth resonance generated by the second radiating stub 312 can support higher frequency wireless signals.

[0109] It should be noted that the above is only an exemplary structure of the first radiator 310. The first radiator 310 may also not include the parasitic branch. In this case, an adjustment structure can be provided on the first radiator 310 so that the first radiator 310 can support the first resonance or the fourth resonance under the tuning of the adjustment structure. The specific structure of the first radiator 310 is not limited in the embodiments of this application.

[0110] The first radiator 310 in this embodiment includes a first radiating stub 311 and a second radiating stub 312. Under the excitation of the first feed source 340, the two radiating stubs can generate two resonances, which can broaden the frequency band of the wireless signal supported by the first radiator 310.

[0111] In this regard, please combine Figure 10 Please refer to Figure 11 , Figure 11 This is an eighth structural schematic diagram of the antenna device 300 provided in the embodiments of this application. The antenna device 300 may further include at least one of a first switching circuit 380 and a second switching circuit 390.

[0112] like Figure 10 As shown, one end of the first switching circuit 380 can be directly or indirectly electrically connected to the region between the second free end 3122 and the second ground end 3121 of the second radiating stub 312. For example, an electrical connection point can be provided on the second radiating stub 312, which can be located between the second free end 3122 and the second ground end 3121. One end of the first switching circuit 380 can be electrically connected to this electrical connection point. The other end of the first switching circuit 380 can be directly or indirectly electrically connected to the ground system 360 to achieve grounding. The first switching circuit 380 enables the fourth resonator to support wireless signals of different frequencies.

[0113] like Figure 11 As shown, one end of the second switching circuit 390 can be directly or indirectly connected to the first feed point 3112 of the first radiating branch 311, and the other end of the second switching circuit 390 can be directly or indirectly connected to the first feed source 340. The second switching circuit 390 can enable the first resonance to support wireless signals of different frequencies.

[0114] It is understood that the antenna device 300 may include a first switching circuit 380 or a second switching circuit 390; the antenna device 300 may also include both the first switching circuit 380 and the second switching circuit 390, so that the first resonance and the fourth resonance of the first radiator 310 can support wireless signals of different frequency bands. Of course, the antenna device 300 may also not include the first switching circuit 380 and the second switching circuit 390, in which case the first resonance and the fourth resonance of the first radiator 310 can support wireless signals of a fixed frequency band. The embodiments of this application do not limit the specific structure of the antenna device 300.

[0115] It is understood that the first switching circuit 380 or the second switching circuit 390 may include switching branches with different impedances, so that when the first switching circuit 380 or the second switching circuit 390 conducts different switching branches, the frequency of the wireless signal supported by the first resonance or the fourth resonance can be adjusted.

[0116] It is understood that at least one of the first switching circuit 380 and the second switching circuit 390 may include, but is not limited to, a circuit structure formed by connecting one or more inductors, capacitors, switches, etc. in series or in parallel. The specific structure of the first switching circuit 380 and the second switching circuit 390 is not limited in the embodiments of this application.

[0117] The first switching circuit 380 and the second switching circuit 390 in this embodiment can adjust the frequencies of the fourth resonance and the first resonance, which can further broaden the bandwidth of the wireless signal supported by the first radiator 310 and improve the radiation performance of the first radiator 310.

[0118] It should be noted that the above is merely an exemplary description of the antenna device 300 in this application embodiment, and the structure of the antenna device 300 is not limited. For example, the antenna device 300 may also include structures such as a filter circuit. Furthermore, the antenna device 300 in this application embodiment is not limited to... Figures 1 to 11 The folded structure shown can be replaced by a non-folded structure, where the first radiator 310 and the second radiator 320 are in close proximity, allowing them to electromagnetically couple under the action of the first feed 340. Furthermore, the band-stop circuit 301 ensures that the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator 320 is spaced apart from the first frequency band. This application does not limit the specific structure of the antenna device 300.

[0119] Based on the structure of the antenna device 300 described above, this application embodiment also provides an electronic device. The electronic device 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 again to... Figure 12 and Figure 13 , Figure 12 This is a schematic diagram of a first structure of the electronic device 10 provided in an embodiment of this application. Figure 13 for Figure 12 The diagram shows another configuration of the electronic device 10. The electronic device 10 may include the antenna device 300 of any of the above embodiments. The electronic device 10 may also include a first body 100 and a second body 200.

[0120] The first body 100 and the second body 200 can be thin plate-like or sheet-like structures, or hollow frame structures. The first body 100 and the second body 200 provide support for the electronic components in the electronic device 10, allowing them to be mounted together. For example, electronic components in the electronic device 10 such as cameras, receivers, circuit boards with radio frequency circuits such as the first feed source 340, and power supplies can be mounted and fixed onto the first body 100 and the second body 200.

[0121] The first body 100 and the second body 200 can move relative to each other, and can fold or slide towards each other. For example... Figure 12 As shown, the second body 200 and the first body 100 can be in an unfolded state that is far apart from each other. The first body 100 and the second body 200 are far apart from each other and do not overlap in space. Figure 13 As shown, the second body 200 and the first body 100 can be in a retracted state, close to each other. The first body 100 and the second body 200 are close to each other such that at least a portion of the second body 200 and the first body 100 can overlap. The first radiator 310 can be disposed on the first body 100, and the second radiator 320 can be disposed on the second body 200. When the electronic device 10 is in a retracted or extended state, the first feed source 340 can excite the first radiator 310 to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band. The second feed source 350 can also excite the second radiator 320 to generate a second resonance and support the transmission and reception of wireless signals in the second frequency band. The band-stop circuit 301 can connect the second radiator 320 and the ground system 360 when the electronic device 10 is in a retracted state, causing a frequency offset in the multiple harmonic resonance of the second resonance generated by the second radiator 320, and causing the frequency band corresponding to the multiple harmonic resonance of the second resonance to be spaced apart from the first frequency band.

[0122] It is understandable that the electronic device 10 can transform between different forms, allowing the first radiator 310 and the second radiator 320 to have different forms. Specifically, the retracted state of the electronic device 10 corresponds to a state where the first radiator 310 and the second radiator 320 are in close electromagnetic coupling, and the second body 200 can move relative to the first body 100, so that the second body 200 and the first body 100 are in a retracted state close to each other, allowing the first radiator 310 and the second radiator 320 to be electromagnetically coupled. The extended state of the electronic device 10 corresponds to a state where the first radiator 310 and the second radiator 320 are in a non-electromagnetic coupling state far apart; the second body 200 can move relative to the first body 100, so that the second body 200 and the first body 100 are in an extended state far apart, allowing the first radiator 310 and the second radiator 320 to be far apart.

[0123] It is understandable that when the electronic device 10 is in a retracted or extended state, the first feed source 340 can excite the first radiator 310 to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band, and the second feed source 350 can excite the second radiator 320 to generate a second resonance and support the transmission and reception of wireless signals in the second frequency band. Of course, when the electronic device 10 is in a retracted state, the second feed source 350 may not operate and may not excite the second radiator 320 to generate a second resonance.

[0124] Understandably, when the electronic device 10 is in the folded state, the first feed source 340 can excite the first radiator 310 to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band, and cause the first radiator 310 and the second radiator 320 to generate electromagnetic coupling so that the second resonance generated by the second radiator 320 is a multiple frequency resonance. At this time, the band-stop circuit 301 can connect the second radiator 320 and the ground system 360. The frequency band corresponding to the multiple frequency resonance of the second resonance is separated from the first frequency band, so that the multiple frequency resonance noise of the second resonance is shifted to outside the operating frequency band (first frequency band) of the first radiator 310 through the band-stop circuit 301, thereby reducing the interference of the first frequency band in the folded state.

[0125] It is understood that when the electronic device 10 is in the retracted state, the projection of the first radiator 310 onto the second body 200 may at least partially coincide with the second radiator 320, or the projection of the first radiator 310 onto the second body 200 may be completely separated from the second radiator 320, but the distance between them is relatively close. This application does not limit this.

[0126] It is understandable that if Figure 12 and Figure 13 As shown, the first body 100 and the second body 200 can fold relative to each other, so that the first body 100 and the second body 200 can be in a folded state where they are close to each other or in an unfolded state where they are far apart from each other. At this time, as... Figure 12 and Figure 13 As shown, the electronic device 10 may also include a pivot 400, to which both the first body 100 and the second body 200 are connected, and the first body 100 and the second body 200 can achieve relative folding movement through the pivot 400.

[0127] It is understandable that if Figure 14 and Figure 15 As shown, Figure 14 This is a schematic diagram of a second structure of the electronic device 10 provided in the embodiments of this application. Figure 15 for Figure 14The diagram shows the electronic device 10 in another configuration. The first body 100 and the second body 200 can slide relative to each other, allowing them to be in a retracted state (closed to each other) or an extended state (away from each other). At this time, as... Figure 14 and Figure 15 As shown, the electronic device 10 may also include a sliding mechanism 500, to which the first body 100 and the second body 200 may be connected, so that the first body 100 and the second body 200 may slide relative to each other through the sliding mechanism 500.

[0128] It should be noted that the above is merely an exemplary description of the first body 100 and the second body 200, and the first body 100 and the second body 200 are not limited to the structures described above. For example, but not limited to, the first body 100 and the second body 200 can be foldable structures or sliding structures. The embodiments of this application do not limit the specific structure of the first body 100 and the second body 200.

[0129] Please refer to the following: Figure 16 , Figure 16 This is a schematic diagram of a third structure of the electronic device 10 provided in the embodiments of this application. The first body 100 may include a first middle frame 110, and the second body 200 may also include a second middle frame 120.

[0130] The first middle frame 110 and the second middle frame 120 can be made of conductive material and have a certain rigidity. The first middle frame 110 and the second middle frame 120 can provide support for the electronic devices in the electronic device 10. The first middle frame 110 can include a first side frame 111 and a first middle plate 112, and the second middle frame 120 can include a second side frame 121 and a second middle plate 122. The first middle plate 112 and the second middle plate 122 can support the components of the electronic device 10. The first side frame 111 can be connected to the edge of the first middle plate 112 and protrude from the first middle plate 112. The second side frame 121 can be connected to the edge of the second middle plate 122 and protrude from the second middle plate 122. The first side frame 111 and the first middle plate 112 can form an accommodating space, and the second side frame 121 and the second middle plate 122 can also form an accommodating space. The electronic components and devices in the electronic device 10 can be installed and fixed in these two accommodating spaces.

[0131] It is understandable that when the first frame 111 and the second frame 121 are made of metal, a slot can be made in the first frame 111 to form a metal branch, and the first radiator 310 can include this metal branch. The first radiator 310 can be a mid-frame antenna radiator. Similarly, a slot can be made in the second frame 121 to form another metal branch, and the second radiator 320 can include this metal branch. The second radiator 320 can also be a mid-frame antenna radiator. The electronic device 10 can fill the slots with non-conductive material to increase the structural strength of the first frame 111 and the second frame 121.

[0132] It should be noted that at least one of the first radiator 310 and the second radiator 320 can also be other forms of antenna radiators, such as, but not limited to, flexible circuit board antenna radiators, patch antenna radiators, etc. The embodiments of this application do not limit the specific formation method of the first radiator 310 and the second radiator 320.

[0133] It is understandable that when the first middle plate 112 and the second middle plate 122 are made of metal, at least one of the first middle plate 112 and the second middle plate 122 can be the ground system 360 of the electronic device 10; at this time, the distance between the first radiator 310 and the second radiator 320 in the form of frame antenna radiators and the ground system 360 is relatively short, which facilitates the grounding layout of the electronic device 10.

[0134] In the electronic device 10 of this application embodiment, the first frame 111 and the second frame 121 form a first radiator 310 and a second radiator 320 through slits. The first radiator 310 and the second radiator 320 do not need to occupy additional space in the electronic device 10, and the electronic device 10 can achieve a miniaturized design.

[0135] Please refer to this again. Figure 16 The electronic device 10 may also include a flexible display screen 600, a circuit board 700, and a power supply 800.

[0136] The flexible display screen 600 can form the display surface of the electronic device 10 for displaying images, text, and other information. The flexible display screen 600 can include displays of the type such as a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED). The flexible display screen 600 can be connected to the first body 100 and the second body 200, and can move with the movement of the first body 100 and the second body 200.

[0137] For example, the first end of the flexible display screen 600 can be connected to the first body 100, and the second end of the flexible display screen 600 can be connected to the second body 200. When the first body 100 and the second body 200 are in the unfolded state, the first end and the second end of the flexible display screen 600 can be on the same plane as the first body 100 and the second body 200 are unfolded. When the first body 100 and the second body 200 are in the retracted state, the flexible display screen 600 can also fold (or slide) as the first body 100 and the second body 200 are folded (or slid), so that the first end and the second end of the flexible display screen 600 can be close to each other or completely close to each other and folded together.

[0138] The circuit board 700 can be mounted on either the first body 100 or the second body 200, and can serve as the motherboard of the electronic device 10. The circuit board 700 can integrate a processor, and may also integrate one or more functional components such as a headphone jack, an accelerometer, a gyroscope, and a motor. At least one of the following components can be located on the circuit board 700: the first feed source 340, the second feed source 350, the band-stop circuit 301, the matching circuit 370, the first switching circuit 380, and the second switching circuit 390, for control by the processor on the circuit board 700.

[0139] The power supply 800 can be installed on either the first body 100 or the second body 200. Simultaneously, the power supply 800 can be electrically connected to the circuit board 700 to power the electronic device 10. The circuit board 700 may have a power supply management circuit. The power supply management circuit is used to distribute the voltage provided by the power supply 800 to the various electronic components in the electronic device 10.

[0140] It is understood that although the structure of the electronic device 10 is described above using the folded form of the electronic device 10, the structures such as the first middle frame 110, the second middle frame 120, the flexible display screen 600, the circuit board 700, and the power supply 800 described above can also be applied to the sliding form of the electronic device 10. This application embodiment will not describe them in detail.

[0141] 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.

[0142] 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.

[0143] 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: First radiator; A first feed source is electrically connected to the first radiator. The first feed source is used to excite the first radiator to generate a first resonance and support the transmission and reception of wireless signals in the first frequency band. The second radiator is disposed at a distance from the first radiator; A second feed source, electrically connected to the second radiator, is used to excite the second radiator to generate a second resonance and support the transmission and reception of wireless signals in the second frequency band; and A resistive circuit is provided, wherein one end of the resistive circuit is electrically connected to the second radiator, and the other end is electrically connected to the ground system to achieve grounding; wherein... When the first feed source excites the first radiator and the second radiator to electromagnetically couple, the band-stop circuit is used to connect the second radiator and the ground system, so that the frequency band corresponding to the multiple harmonic resonance of the second resonance generated by the second radiator is spaced apart from the first frequency band.

2. The antenna device according to claim 1, characterized in that, The band-stop circuit includes: A first inductive load branch, one end of which is electrically connected to the second radiator and the other end of which is electrically connected to the ground system to achieve grounding; and A first capacitive load branch, one end of which is electrically connected to the second radiator and the other end of which is electrically connected to the ground system to achieve grounding; the first capacitive load branch is used to conduct the connection between the second radiator and the ground system when the first radiator and the second radiator are electromagnetically coupled.

3. The antenna device according to claim 2, characterized in that, The first resonance is also used to support the transmission and reception of wireless signals in the third frequency band; the antenna device further includes: A first switching switch includes a first input terminal, a first output terminal, and at least one second output terminal. The first input terminal is electrically connected to the second radiator, and one end of the first capacitive load branch is electrically connected to the first output terminal. At least one second capacitive load branch, one end of each second capacitive load branch being electrically connected to the ground system for grounding, and the other end being electrically connected to a second output terminal; wherein, When the first radiator and the second radiator are electromagnetically coupled and the first resonance supports the wireless signal transmission and reception of the first frequency band, the first switching switch is used to connect the first input terminal and the first output terminal so that the first inductive load branch and the first capacitive load branch form the band-resistance circuit. When the first radiator and the second radiator are electromagnetically coupled and the first resonance supports the wireless signal transmission and reception of the third frequency band, the first switching switch is used to connect the first input terminal and a second output terminal, so that the first inductive load branch and the second capacitive load branch form a tuning circuit, and the first feed excites the second radiator and the tuning circuit to jointly generate a third resonance, the third resonance being used to enhance the antenna efficiency of the first resonance supporting the third frequency band.

4. The antenna device according to claim 3, characterized in that, The first radiator is also used to generate a fourth resonance, the fourth resonance supporting a wireless signal frequency band different from the frequency band supported by the first resonance.

5. The antenna device according to claim 4, characterized in that, The capacitance value of the first capacitive load branch is within a first preset range, so that when the first switching switch connects the first input terminal and the first output terminal, the frequency band corresponding to the multiple harmonic resonance of the second resonance is spaced apart from the first frequency band and also spaced apart from the frequency band of the wireless signal supported by the fourth resonance. And / or, When the inductance value of the first inductive load branch is within a second preset range, so that when the first switching switch connects the first input terminal and a second output terminal, the third resonance is used to enhance the antenna efficiency of the first resonance supporting the third frequency band.

6. The antenna device according to claim 5, characterized in that, The first radiator includes: The first radiating branch includes a first grounding terminal, a first feed point, and a first free end arranged in sequence, wherein the first grounding terminal is electrically connected to the ground system to achieve grounding; and The second radiating stub includes a second free end and a second grounded end, the second free end being spaced apart from the first free end, and the second grounded end extending in a direction away from the first radiating stub and grounded; wherein... The first feed source is electrically connected to the first feed point. The first feed source is used to excite the first radiating stub to generate the first resonance and at least excite the second radiating stub to generate the fourth resonance.

7. The antenna device according to claim 6, characterized in that, The antenna device further includes: A first switching circuit, one end of which is electrically connected between the second free terminal and the second ground terminal, and the other end of which is grounded, is used to enable the fourth resonant to support wireless signals of different frequencies; and / or, The second switching circuit is electrically connected between the first feed point and the first feed source. The second switching circuit is used to enable the first resonance to support wireless signals of different frequencies.

8. The antenna device according to claim 2, characterized in that, The first inductive load branch is also used to adjust the frequency range of the second frequency band.

9. The antenna device according to claim 1, characterized in that, The first resonance is also used to support the transmission and reception of wireless signals in the third frequency band; the antenna device further includes: The third capacitive load branch has one end electrically connected to the second radiator and the other end electrically connected to the ground system to achieve grounding. The second switching switch includes a second input terminal, a third output terminal and at least one fourth output terminal, wherein the second input terminal is electrically connected to the second radiator; The second inductive load branch, one end of which is electrically connected to the ground system to achieve grounding, and the other end of which is electrically connected to the third output terminal; and At least one third inductive load branch, one end of each third inductive load branch being electrically connected to the ground system for grounding, and the other end being electrically connected to one of the fourth output terminals; wherein, When the first radiator and the second radiator are electromagnetically coupled and the first resonance supports the wireless signal transmission and reception of the first frequency band, the second switching switch connects the second input terminal and the third output terminal so that the third capacitive load branch and the second inductive load branch form the band-stop circuit. When the first radiator and the second radiator are electromagnetically coupled and the first resonance supports the wireless signal transmission and reception of the third frequency band, the second switching switch connects the second input terminal and the fourth output terminal, so that the third capacitive load branch and the third inductive load branch form a tuning circuit, and the first feed excites the second radiator and the tuning circuit to jointly generate a third resonance, which is used to enhance the antenna efficiency of the first resonance supporting the third frequency band.

10. The antenna device according to any one of claims 1 to 9, characterized in that, The second feed source is used to excite the second radiator to generate the second resonance when the first radiator and the second radiator are electromagnetically coupled or far apart.

11. The antenna device according to any one of claims 1 to 9, characterized in that, The first radiator is used to support wireless signals in the mid-to-high frequency band, and the second radiator is used to support wireless signals in the low frequency band.

12. The antenna device according to any one of claims 1 to 9, characterized in that, The first frequency band is either the B41 band or the N41 band, and the second frequency band is either the B28 band or the N28 band; or, The first frequency band is a 5G Wi-Fi band, N79 band, or B79 band, and the second frequency band is a B5 band, B8 band, N5 band, or N8 band.

13. An electronic device, characterized in that, Includes the antenna device as described in any one of claims 1 to 12.

14. The electronic device according to claim 13, characterized in that, The electronic device further includes a first body and a second body, wherein the first radiator is disposed in the first body and the second radiator is disposed in the second body; wherein... The second body can move relative to the first body, such that the second body and the first body can be in a close-to-each-body retracted state, and the first radiator and the second radiator can be electromagnetically coupled; or, The second body can move relative to the first body so that the second body can be in an unfolded state that is far away from the first body and that the first radiator and the second radiator are far away from each other.

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