Antenna device, electronic equipment and antenna switching method

Abstract

The embodiment of the invention provides an antenna device, electronic equipment and an antenna switching method, and the antenna device comprises a first radiator which comprises a first feeding point and a second feeding point; the second radiating body is coupled with the first radiating body through the first gap; the third radiating body is coupled with the first radiating body through the second gap; when an excitation signal is fed into the first feeding point, the second feeding point is grounded, and the antenna device generates a first resonant mode and a second resonant mode; and when the excitation signal is fed into the second feeding point, the first feeding point is grounded, and the antenna device generates a third resonant mode and a fourth resonant mode. According to the antenna device provided by the embodiment of the invention, when the communication performance of the antenna device is influenced by hand holding of a user, the feeding point can be switched, so that the resonant mode of the antenna device can be switched, the influence of hand holding of the user on the antenna is reduced, and the communication performance of the antenna device is improved.

Description

Technical Field

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

[0002] Electronic devices such as smartphones are usually equipped with multiple antennas, such as LB (Lower Band) antennas, MHB (Middle High Band) antennas, WIFI antennas, etc., to achieve corresponding communication functions.

[0003] When a user actually uses an electronic device, the user may hold the portion where the antenna is located, causing the antenna to be firmly held, thereby affecting the communication performance of the electronic device. Summary of the invention

[0004] The embodiments of the present application provide an antenna device, an electronic device, and an antenna switching method, which can reduce the impact of a user's hand holding on the antenna and improve the communication performance of the antenna device.

[0005] An embodiment of the present application provides an antenna device, including:

[0006] A first radiator, comprising a first end, a second end, and a first feeding point and a second feeding point disposed between the first end and the second end, wherein the second feeding point is located between the first feeding point and the second end;

[0007] a second radiator, wherein a first gap is provided between one end of the second radiator and the first end, the second radiator is coupled to the first radiator through the first gap, and the other end of the second radiator is grounded;

[0008] a third radiator, wherein a second gap is provided between one end of the third radiator and the second end, the third radiator is coupled to the first radiator through the second gap, and the other end of the third radiator is grounded;

[0009] Wherein, when the first feeding point is fed with an excitation signal, the second feeding point is grounded, and the antenna device generates a first resonance mode and a second resonance mode, the first resonance mode is generated by the first radiator, the second resonance mode is generated by the first radiator and the second radiator, and in the second resonance mode, the resonance current intensity generated on the second radiator is greater than the resonance current intensity generated on the first radiator;

[0010] When the excitation signal is fed into the second feeding point, the first feeding point is grounded, and the antenna device generates a third resonant mode and a fourth resonant mode. The third resonant mode is generated by the first radiator, and the fourth resonant mode is generated by the first radiator and the third radiator. In the fourth resonant mode, the resonant current intensity generated on the third radiator is greater than the resonant current intensity generated on the first radiator.

[0011] An embodiment of the present application further provides an electronic device, comprising the above-mentioned antenna device.

[0012] The embodiment of the present application further provides an antenna switching method, which is applied to the above electronic device. The antenna switching method includes:

[0013] When feeding the excitation signal to the first radiator through the first feeding point, determining whether the first end is held, and if the first end is held, switching to feeding the excitation signal to the first radiator through the second feeding point; or

[0014] When the excitation signal is fed to the first radiator through the second feeding point, it is determined whether the second end is held; if the second end is held, the excitation signal is fed to the first radiator through the first feeding point.

[0015] The antenna device provided in the embodiment of the present application sets dual feeding points, that is, sets a first feeding point and a second feeding point on the first radiator. It is possible to feed an excitation signal to the first radiator through the first feeding point and to feed an excitation signal to the first radiator through the second feeding point. Therefore, when the communication performance of the antenna device is affected by the user's hand holding, the feeding point can be switched, for example, the excitation signal fed from the first feeding point is switched to the excitation signal fed from the second feeding point, or the excitation signal fed from the second feeding point is switched to the excitation signal fed from the first feeding point, thereby switching the resonant mode of the antenna device, reducing the influence of the user's hand holding on the antenna, and improving the communication performance of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the first structure of the antenna device according to an embodiment of the present application.

[0018] Figure 2 for Figure 1A schematic diagram of a first resonant current distribution of the antenna device is shown.

[0019] Figure 3 for Figure 1 Schematic diagram of the second resonant current distribution of the antenna device shown.

[0020] Figure 4 This is a schematic diagram of a second structure of the antenna device according to an embodiment of the present application.

[0021] Figure 5 for Figure 4 A schematic structural diagram of a first matching module of the antenna device is shown.

[0022] Figure 6 for Figure 4 A schematic structural diagram of a second matching module of the antenna device is shown.

[0023] Figure 7 This is a schematic diagram of a third structure of the antenna device according to an embodiment of the present application.

[0024] Figure 8 This is a schematic diagram of a fourth structure of the antenna device according to an embodiment of the present application.

[0025] Fig. 9 Schematic diagram of the structure of the third matching module and the fourth matching module of the antenna device according to the embodiment of the present application.

[0026] Fig.10 FIG. 1 is a schematic diagram of simulation results of an antenna device according to an embodiment of the present application.

[0027] Fig.11 Schematic diagram of application scenario of the antenna device according to an embodiment of the present application.

[0028] Fig.12 Schematic diagram of antenna efficiency comparison of the antenna device according to an embodiment of the present application before and after the feeding point is switched.

[0029] Fig.13 This is a schematic diagram of the first structure of an electronic device according to an embodiment of the present application.

[0030] Fig.14 This is a second structural schematic diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0032] The present application provides an antenna device, which can be applied to electronic devices, such as smart phones, tablet computers, gaming devices, AR (Augmented Reality) devices, laptop computers, desktop computing devices, and other devices with wireless communication functions.

[0033] refer to Figure 1 , Figure 1 1 is a schematic diagram of a first structure of an antenna device 10 according to an embodiment of the present application. The antenna device 10 includes a first radiator 11, a second radiator 12, a third radiator 13, a first feed source P1 and a second feed source P2.

[0034] Among them, the first radiator 11, the second radiator 12, and the third radiator 13 can all be antenna radiators in the form of FPC (Flexible Printed Circuit), LDS (Laser Direct Structure), PDS (Printing Direct Structure), etc., or they can be antenna radiators formed by structures such as conductor structures inside electronic equipment and metal traces on circuit boards. In practical applications, the first radiator 11, the second radiator 12, and the third radiator 13 can be antenna radiators of different forms or antenna radiators of the same form. The shape, size, etc. of the first radiator 11, the second radiator 12, and the third radiator 13 can be set according to actual needs.

[0035] The first radiator 11 includes a first end 111, a second end 112, a first feeding point 113 and a second feeding point 114. For example, when the first radiator 11 is in a long strip shape, the first end 111 and the second end 112 may be two opposite ends of the first radiator 11. The first feeding point 113 and the second feeding point 114 are both located between the first end 111 and the second end 112. The second feeding point 114 is located between the first feeding point 113 and the second end 112, which can also be understood as the first feeding point 113 being located between the second feeding point 114 and the first end 111. The first feeding point 113 and the second feeding point 114 can both be used to feed in excitation signals to excite the first radiator 11 to resonate and radiate wireless signals. In addition, the first feeding point 113 and the second feeding point 114 can also be grounded to achieve ground return of the first radiator 11.

[0036] The second radiator 12 is spaced apart from the first radiator 11. A first gap 10a is provided between one end of the second radiator 12 and the first end 111 of the first radiator 11. The second radiator 12 is coupled to the first radiator 11 through the first gap 10a. The other end of the second radiator 12 is grounded, that is, the end of the second radiator 12 away from the first gap 10a is grounded. Therefore, after the excitation signal is fed into the first radiator 11, a coupling current can be generated on the second radiator 12 through the coupling between the first radiator 11 and the second radiator 12, so that the second radiator 12 also resonates and radiates a wireless signal.

[0037] The third radiator 13 is spaced apart from the first radiator 11. A second gap 10b is provided between one end of the third radiator 13 and the second end 112 of the first radiator 11. The third radiator 13 is coupled to the first radiator 11 through the second gap 10b. The other end of the third radiator 13 is grounded, that is, the end of the third radiator 13 away from the second gap 10b is grounded. Therefore, after the excitation signal is fed to the first radiator 11, a coupling current can be generated on the third radiator 13 through the coupling between the first radiator 11 and the third radiator 13, so that the third radiator 13 also resonates and radiates a wireless signal.

[0038] The first feed P1 and the second feed P2 can be arranged on a circuit board of the electronic device, for example, on a main board, or on a separate small board. Both the first feed P1 and the second feed P2 can be used to provide the above-mentioned excitation signal. It should be noted that the first feed P1 and the second feed P2 provide the same excitation signal. The excitation signal can be an excitation signal of 4G, 5G, WIFI and other types. For example, in an application example, the excitation signal can be an excitation signal of the MHB (frequency range between 1000MHz and 3000MHz) frequency band of 4G.

[0039] The first feed source P1 is electrically connected to the first feed point 113, and the electrical connection between the first feed source P1 and the first feed point 113 can also be disconnected. The second feed source P2 is electrically connected to the second feed point 114, and the electrical connection between the second feed source P2 and the second feed point 114 can also be disconnected. In practical applications, the first feed source P1 can feed an excitation signal to the first radiator 11 through the first feed point 113, and the second feed source P2 can feed an excitation signal to the first radiator 11 through the second feed point 114.

[0040] In the embodiment of the present application, when the first feeding point 113 feeds the excitation signal, the second feeding point 114 is grounded. At this time, the antenna device 10 generates a first resonance mode and a second resonance mode. The first resonance mode is generated by the first radiator 11, and the second resonance mode is generated by the first radiator 11 and the second radiator 12. In the second resonance mode, the resonance current intensity generated on the second radiator 12 is greater than the resonance current intensity generated on the first radiator 11.

[0041] When the second feeding point 114 is fed with an excitation signal, the first feeding point 113 is grounded. At this time, the antenna device 10 generates a third resonance mode and a fourth resonance mode. The third resonance mode is generated by the first radiator 11, and the fourth resonance mode is generated by the first radiator 11 and the third radiator 13. In the fourth resonance mode, the resonance current intensity generated on the third radiator 13 is greater than the resonance current intensity generated on the first radiator 11.

[0042] Also refer to Figure 2 , Figure 2 for Figure 1 The first resonant current distribution diagram of the antenna device 10 is shown. When the first feed source P1 is connected to the first feed point 113, the second feed source P2 is electrically disconnected from the second feed point 114, and the second feed point 114 is grounded. In this case, the first feed source P1 feeds an excitation signal to the first radiator 11 through the first feed point 113. At this time, the antenna device 10 generates the above-mentioned first resonant mode and second resonant mode, and radiates wireless signals to the outside world. Figure 2 As shown, in the first resonance mode, the first radiator 11 generates a first resonance current I1; in the second resonance mode, the first radiator 11 generates a second resonance current I2, and the second radiator 12 generates a third resonance current I3. The intensity of the third resonance current I3 generated on the second radiator 12 is greater than the intensity of the second resonance current I2 generated on the first radiator 11.

[0043] In practical applications, the first resonance mode may be a half-wavelength mode of the first radiator 11, that is, the length of the first radiator 11 is half of the wavelength of the first resonance mode, and the wavelength is the wavelength corresponding to the center frequency of the first resonance mode. In an application example, the frequency band of the first resonance mode may be the B3 band (uplink frequency range is 1710MHz to 1785MHz, downlink frequency range is 1805MHz to 1880MHz), the B1 band (uplink frequency range is 1920MHz to 1980MHz, downlink frequency range is 2110MHz to 2170MHz), etc.

[0044] In the second resonance mode, the first radiator 11 generates a quarter wavelength mode from the first feeding point 113 to the first end 111, that is, the length from the first feeding point 113 to the first end 111 is one quarter of the wavelength of the second resonance mode, which is the wavelength corresponding to the center frequency of the second resonance mode. In an application example, the frequency band of the second resonance mode can be the B40 band (frequency range is 2300MHz to 2400MHz), the B41 band (frequency range is 2496MHz to 2690MHz), etc., or it can be the 2.4G band of WIFI (frequency range is 2.4GHz to 2.5GHz).

[0045] In this case, the antenna device 10 can simultaneously radiate wireless signals of the first resonance mode and wireless signals of the second resonance mode, for example, radiate wireless signals of the B3 frequency band and wireless signals of the B41 frequency band at the same time, and the antenna device 10 can simultaneously cover the B3 frequency band and the B41 frequency band, forming a carrier aggregation (CA) mode of the B3 frequency band and the B41 frequency band. Therefore, the bandwidth of the antenna device 10 can be expanded and the communication capability of the electronic device can be improved.

[0046] Also refer to Figure 3 , Figure 3 for Figure 1 The second resonant current distribution diagram of the antenna device 10 is shown. When the second feed source P2 is connected to the second feed point 114, the first feed source P1 is disconnected from the first feed point 113, and the first feed point 113 is grounded. In this case, the second feed source P2 feeds an excitation signal to the first radiator 11 through the second feed point 114. At this time, the antenna device 10 generates the third resonant mode and the fourth resonant mode mentioned above, and radiates wireless signals to the outside world. Figure 3 As shown, in the third resonance mode, the fourth resonance current I4 is generated on the first radiator 11; in the fourth resonance mode, the fifth resonance current I5 is generated on the first radiator 11, and the sixth resonance current I6 is generated on the third radiator 13. The intensity of the sixth resonance current I6 generated on the third radiator 13 is greater than the intensity of the fifth resonance current I5 generated on the first radiator 11.

[0047] In practical applications, the third resonance mode may also be a half-wavelength mode of the first radiator 11, that is, the length of the first radiator 11 is half of the wavelength of the third resonance mode, which is the wavelength corresponding to the center frequency of the third resonance mode. In an application example, the frequency band of the third resonance mode may be the B3 frequency band, the B1 frequency band, etc.

[0048] In the fourth resonance mode, the first radiator 11 generates a quarter-wavelength mode from the second feeding point 114 to the second end 112, that is, the length from the second feeding point 114 to the second end 112 is one quarter of the wavelength of the fourth resonance mode, which is the wavelength corresponding to the center frequency of the fourth resonance mode. In an application example, the frequency band of the fourth resonance mode can be the B40 frequency band, the B41 frequency band, etc., or the 2.4G frequency band of WIFI.

[0049] In this case, the antenna device 10 can simultaneously radiate wireless signals of the third resonance mode and wireless signals of the fourth resonance mode, for example, wireless signals of the B3 frequency band and wireless signals of the B41 frequency band can also be radiated simultaneously, and the antenna device 10 can also simultaneously cover the B3 frequency band and the B41 frequency band to form a carrier aggregation (CA) mode of the B3 frequency band and the B41 frequency band. Therefore, the bandwidth of the antenna device 10 can also be expanded to improve the communication capability of the electronic device.

[0050] In practical applications, the antenna device 10 can be switched between two feeding modes, that is, it can be switched between feeding through the first feeding point 113 and feeding through the second feeding point 114. For example, the position of the user's hand can be detected by a sensor, and the switching can be performed according to the position of the user's hand; or the wireless signal radiation efficiency of the antenna device 10 can be detected, and the switching can be performed when the wireless signal radiation efficiency decreases significantly.

[0051] When the user's hand is near the first end 111, that is, near the first gap 10a, the first end 111 will be blocked, thereby affecting the wireless signal radiation efficiency of the first resonance mode and the second resonance mode, resulting in a significant decrease in the wireless signal radiation efficiency of the first resonance mode and the second resonance mode. In this case, the second feed source P2 can be switched to feed an excitation signal to the first radiator 11 through the second feeding point 114, so that the antenna device 10 generates a third resonance mode and a fourth resonance mode, thereby avoiding the user's hand holding part and improving the wireless communication performance.

[0052] When the user's hand is near the second end 112, that is, near the second gap 10b, the second end 112 will be blocked, thereby affecting the wireless signal radiation efficiency of the third resonance mode and the fourth resonance mode, resulting in a significant decrease in the wireless signal radiation efficiency of the third resonance mode and the fourth resonance mode. In this case, the first feed source P1 can be switched to feed an excitation signal to the first radiator 11 through the first feeding point 113, so that the antenna device 10 generates the first resonance and the second resonance, thereby avoiding the user's hand holding part and improving the wireless communication performance.

[0053] In some embodiments, reference Figure 4 , Figure 4 1 is a schematic diagram of a second structure of the antenna device 10 according to an embodiment of the present application. The antenna device 10 further includes a first switch K1, a second switch K2, a first matching module M1 and a second matching module M2.

[0054] Among them, the first feed source P1 is electrically connected to the first feeding point 113 through the first switch K1. The first switch K1 can be a single-pole single-throw switch, for example, a switch with a single-pole single-throw switch function formed by semiconductor devices such as transistors and switch tubes. The first switch K1 is used to connect or disconnect the first feed source P1 and the first feeding point 113. One end of the first matching module M1 is connected between the first switch K1 and the first feeding point 113, and the other end is grounded. The first matching module M1 can be used to switch the resonant frequency band of the antenna device 10.

[0055] The second feed source P2 is electrically connected to the second feed point 114 through the second switch K2. The second switch K2 may be a single-pole single-throw switch, for example, a switch having a single-pole single-throw switch function formed by semiconductor devices such as transistors and switch tubes. The second switch K2 is used to connect or disconnect the second feed source P2 and the second feed point 114. One end of the second matching module M2 is connected between the second switch K2 and the second feed point 114, and the other end is grounded. The second matching module M2 may also be used to switch the resonant frequency band of the antenna device 10.

[0056] In practical applications, the antenna device 10 can be switched by the first switch K1 and the second switch K2.

[0057] In the first working mode, the first switch K1 can be controlled to be turned on, and the second switch K2 can be controlled to be turned off. In this case, the first feed source P1 feeds an excitation signal to the first radiator 11 through the first feeding point 113, and the second feeding point 114 is grounded through the second matching module M2. In addition, the first matching module M1 can also be adjusted to a desired impedance so that the antenna device 10 matches the desired communication frequency band.

[0058] In the second working mode, the second switch K2 can be controlled to be turned on, and the first switch K1 can be controlled to be turned off. In this case, the second feed source P2 feeds an excitation signal to the first radiator 11 through the second feed point 114, and the first feed point 113 is grounded through the first matching module M1. In addition, the second matching module M2 can also be adjusted to a desired impedance so that the antenna device 10 matches the desired communication frequency band.

[0059] It can be understood that in actual applications, the first matching module M1 and the second matching module M2 are both used to switch the resonant frequency band of the antenna device 10. In some scenarios, such as in areas where the resonant frequency band of the antenna device 10 does not need to be switched, the first matching module M1 and the second matching module M2 can be replaced by inductors. Therefore, when the first switch K1 is disconnected, the first feeding point 113 can be grounded through the inductor; when the second switch K2 is disconnected, the second feeding point 114 can be grounded through the inductor.

[0060] In some embodiments, reference Figure 5 , Figure 5 for Figure 4 A schematic structural diagram of a first matching module M1 of the antenna device is shown.

[0061] The first matching module M1 includes a plurality of first matching paths M11 and a first switch K3. The impedances of the plurality of first matching paths M11 are different, and the specific impedance of each first matching path M11 can be set according to actual needs. In practical applications, each first matching path M11 can include one or more of an inductor and a capacitor. When the first matching path M11 includes both an inductor and a capacitor, the inductor and the capacitor can be connected in series or in parallel. The plurality of first matching paths M11 are all grounded.

[0062] The first switch K3 is a single-pole multi-throw switch, for example, a switch with a single-pole multi-throw switch function formed by semiconductor devices such as transistors and switch tubes. One end of the first switch K3 is connected between the first switch K1 and the first feeding point 113, and the other end is used to select and connect one of the multiple first matching paths M11 to achieve switching of the resonant frequency band of the antenna device 10, for example, switching the frequency band of the first resonance to the B3 frequency band or the B1 frequency band.

[0063] In some embodiments, reference Figure 6 , Figure 6 for Figure 4 A schematic structural diagram of a second matching module of the antenna device 10 is shown.

[0064] The second matching module M2 includes a plurality of second matching paths M21 and a second switch K4. The impedances of the plurality of second matching paths M21 are different, and the specific impedance of each second matching path M21 can be set according to actual needs. In practical applications, each second matching path M21 can include one or more of an inductor and a capacitor. When the second matching path M21 includes both an inductor and a capacitor, the inductor and the capacitor can be connected in series or in parallel. The plurality of second matching paths M21 are all grounded.

[0065] The second switch K4 is a single-pole multi-throw switch, for example, a switch with a single-pole multi-throw switch function formed by semiconductor devices such as transistors and switch tubes. One end of the second switch K4 is connected between the second switch K2 and the second feeding point 114, and the other end is used to select and connect one of the multiple second matching paths M21 to achieve switching of the resonant frequency band of the antenna device 10, for example, switching the frequency band of the second resonance to the B3 frequency band or the B1 frequency band.

[0066] In some embodiments, reference Figure 7 , Figure 7 This is a third structural schematic diagram of the antenna device 10 according to an embodiment of the present application.

[0067] A first capacitor C1 may be provided between the first feed source P1 and the first switch K1. The first capacitor C1 may filter the excitation signal provided by the first feed source P1. A second capacitor C2 may be provided between the second feed source P2 and the second switch K2. The second capacitor C2 may filter the excitation signal provided by the second feed source P2.

[0068] In some embodiments, reference Figure 8 , Figure 8 This is a fourth structural schematic diagram of the antenna device 10 according to an embodiment of the present application.

[0069] The antenna device 10 further includes a third matching module M3 and a fourth matching module M4.

[0070] The second radiator 12 is grounded through the third matching module M3. The third matching module M3 can also switch the resonant frequency band of the antenna device 10 through different impedances, for example, switching the resonant frequency band of the second resonant mode to the B40 band or the B41 band. In practical applications, the specific circuit structure of the third matching module M3 can be implemented in a variety of forms.

[0071] The third radiator 13 is grounded through the fourth matching module 14. The fourth matching module M4 can also switch the resonant frequency band of the antenna device 10 through different impedances, for example, switching the frequency band of the fourth resonant mode to the B40 band or the B41 band. In practical applications, the specific circuit structure of the fourth matching module M4 can be implemented in a variety of forms.

[0072] It should be noted that, in actual applications, only one of the third matching module M3 and the fourth matching module M4 may be provided. For example, the antenna device 10 may include the third matching module M3 but not the fourth matching module M4; or, the antenna device 10 may include the fourth matching module M4 but not the third matching module M3.

[0073] Also refer to Fig. 9 , Fig. 9Schematic diagram of the structure of the third matching module M3 and the fourth matching module M4 of the antenna device according to the embodiment of the present application.

[0074] The third matching module M3 and the fourth matching module M4 may include one or more of an inductor and a capacitor. When both an inductor and a capacitor are included, the inductor and the capacitor may be connected in series or in parallel. The circuit structure of the third matching module M3 and the fourth matching module M4 may be the same or different. Specifically, the circuit structure of the third matching module M3 and the fourth matching module M4 may be: Fig. 9 Any one of A to H shown.

[0075] Among them, A is the inductor and capacitor connected in series. B is the capacitor and inductor connected in parallel. C is the capacitor and inductor connected in parallel to form a parallel unit, and then the parallel unit is connected in series with the capacitor. D is the capacitor and inductor connected in parallel to form a parallel unit, and then the parallel unit is connected in series with the inductor. E is the inductor and capacitor connected in series to form a series unit, and then the series unit is connected in parallel with the capacitor. F is the inductor and capacitor connected in series to form a series unit, and then the series unit is connected in parallel with the inductor. G is the capacitor and inductor connected in parallel to form a parallel unit, and then the two parallel units are connected in series. H is the inductor and capacitor connected in series to form a series unit, and then the two series units are connected in parallel.

[0076] It should be noted that Fig. 9 The structures A to H shown are only feasible examples. In practical applications, the third matching module M3 and the fourth matching module M4 may also be other circuit structures, which are not listed here.

[0077] refer to Fig.10 , Fig.10 Schematic diagram of the simulation results of the antenna device 10 of the embodiment of the present application. Wherein, L1 is the S parameter curve of the antenna device 10, and the S parameter curve when the first feeding point 113 is fed with the excitation signal is basically coincident with the S parameter curve when the second feeding point 114 is fed with the excitation signal. Point 1 represents the resonant frequency band of the first resonant mode and the third resonant mode, for example, the B3 frequency band; point 2 represents the resonant frequency band of the second resonant mode and the fourth resonant mode, for example, the B41 frequency band. L2 is the total radiation efficiency curve of the antenna device 10, and the total radiation efficiency curve when the first feeding point 113 is fed with the excitation signal is basically coincident with the total radiation efficiency curve when the second feeding point 114 is fed with the excitation signal. L3 is the theoretical radiation efficiency curve of the antenna device 10, and the theoretical radiation efficiency curve when the first feeding point 113 is fed with the excitation signal is basically coincident with the theoretical radiation efficiency curve when the second feeding point 114 is fed with the excitation signal.

[0078] refer to Fig.11 , Fig.11Schematic diagram of application scenarios of the antenna device 10 of an embodiment of the present application. When a user is using an electronic device, the user's finger may press the position of the first slit 10a. At this time, the communication performance when the excitation signal is fed into the first feeding point 113 is greatly affected. In this case, the excitation signal can be fed into the second feeding point 114 to improve the communication performance. In other application scenarios, the user's finger may press the position of the second slit 10b. At this time, the communication performance when the excitation signal is fed into the second feeding point 114 is greatly affected. In this case, the excitation signal can be fed into the first feeding point 113 to improve the communication performance.

[0079] refer to Fig.12 , Fig.12 The schematic diagram of the antenna efficiency comparison of the antenna device 10 before and after the switching of the feeding point of the embodiment of the present application is shown. Among them, L4 is the total radiation efficiency curve when the antenna device 10 is not affected by the user's grip, L5 is the total radiation efficiency curve when the antenna device 10 is affected by the user's grip, and L6 is the total radiation efficiency curve after the antenna device 10 is affected by the user's grip and the feeding point is switched. L7 is the theoretical radiation efficiency curve when the antenna device 10 is not affected by the user's grip, L8 is the theoretical radiation efficiency curve when the antenna device 10 is affected by the user's grip, and L9 is the theoretical radiation efficiency curve after the antenna device 10 is affected by the user's grip and the feeding point is switched. Among them, point 1 represents the resonant frequency band of the first resonant mode and the third resonant mode, for example, the B3 frequency band; point 2 represents the resonant frequency band of the second resonant mode and the fourth resonant mode, for example, the B41 frequency band.

[0080] Taking the resonant frequency band of the first resonant mode and the third resonant mode as the B3 frequency band, and the resonant frequency band of the second resonant mode and the fourth resonant mode as the B41 frequency band as an example, the experimentally measured relevant data are shown in Table 1:

[0081] Table 1 Schematic diagram of total radiation efficiency comparison

[0082]

[0083] It can be seen from Table 1 that after the antenna device 10 is affected by the user's grip and the feeding point is switched, the total radiation efficiency of the B3 frequency band is increased by 2.8 dB, and the total radiation efficiency of the B41 frequency band is increased by 5.6 dB. It can be seen that after switching the feeding point, the total radiation efficiency of the antenna device 10 is greatly improved, so the influence of the user's grip on the antenna can be reduced, and the communication performance of the electronic device can be improved.

[0084] The antenna device 10 provided in the embodiment of the present application sets dual feeding points, that is, sets a first feeding point 113 and a second feeding point 114 on the first radiator 11, so that the excitation signal can be fed to the first radiator 11 through the first feeding point 113, and the excitation signal can be fed to the first radiator 11 through the second feeding point 114. Therefore, when the user's hand grip affects the communication performance of the antenna device 10, the feeding point can be switched, for example, the excitation signal fed from the first feeding point 113 is switched to the excitation signal fed from the second feeding point 114, or the excitation signal fed from the second feeding point 114 is switched to the excitation signal fed from the first feeding point 113, so that the antenna device 10 can switch the resonance mode, for example, from the first resonance mode and the second resonance mode to the third resonance mode and the fourth resonance mode, or from the third resonance mode and the fourth resonance mode to the first resonance mode and the second resonance mode, so that the influence of the user's hand grip on the antenna can be reduced, and the communication performance of the antenna device 10 can be improved.

[0085] The embodiment of the present application also provides an electronic device. The electronic device may be, for example, a smart phone, a tablet computer, a gaming device, an AR (Augmented Reality) device, a laptop computer, a desktop computing device, or other device with a wireless communication function.

[0086] refer to Fig.13 , Fig.13 1 is a schematic diagram of a first structure of an electronic device 100 according to an embodiment of the present application, wherein the electronic device 100 includes the antenna device 10 of any of the above embodiments.

[0087] In some embodiments, reference Fig.14 , Fig.14 This is a second structural diagram of the electronic device 100 according to an embodiment of the present application.

[0088] The electronic device 100 further includes a processor 20. The processor 20 may be disposed on a main board of the electronic device 100. The processor 20 is electrically connected to the antenna device 10. For example, the processor 20 may be electrically connected to the first switch K1 and the second switch K2 of the antenna device 10 to control the states of the first switch K1 and the second switch K2. Therefore, the processor 20 may control the switching of the feeding point of the antenna device 10 by controlling the states of the first switch K1 and the second switch K2.

[0089] Specifically, the processor 20 may be used to: control the excitation signal to be fed to the first radiator 11 through the first feeding point 113, and control the second feeding point 114 to be grounded; or control the excitation signal to be fed to the first radiator 11 through the second feeding point 114, and control the first feeding point 113 to be grounded. For example, the processor 20 may control the first switch K1 and the second switch K2 to control the excitation signal to be fed to the first radiator 11 through one of the first feeding point 113 and the second feeding point 114, and control the other of the first feeding point 113 and the second feeding point 114 to be grounded.

[0090] The embodiment of the present application further provides an antenna switching method, which is applied to the above electronic device 100. The antenna switching method includes:

[0091] When feeding the excitation signal to the first radiator 11 through the first feeding point 113, determining whether the first end 111 is held, and if the first end 111 is held, switching to feeding the excitation signal to the first radiator 11 through the second feeding point 114; or

[0092] When feeding the excitation signal to the first radiator 11 through the second feeding point 114 , it is determined whether the second end 112 is held. If the second end 112 is held, the excitation signal is fed to the first radiator 11 through the first feeding point 113 .

[0093] It is understandable that when an excitation signal is fed to the first radiator 11 through the first feeding point 113, if it is determined that the first end 111 is not held, the feeding point may not be switched. Similarly, when an excitation signal is fed to the first radiator 11 through the second feeding point 114, if it is determined that the second end 112 is not held, the feeding point may not be switched.

[0094] In practical applications, sensors such as photoelectric sensors, pressure sensors, capacitive sensors, etc. can be set in electronic devices to detect the user's holding position, and determine whether the first end 111 or the second end 112 is held based on the detected holding position.

[0095] It should be noted that, in some embodiments, the wireless signal radiation efficiency of the antenna device 10 can also be detected in real time, and whether the first end 111 or the second end 112 is held can be indirectly determined by the wireless signal radiation efficiency. For example, when an excitation signal is fed to the first radiator 11 through the first feeding point 113, if it is detected that the wireless signal radiation efficiency of the antenna device 10 is significantly reduced, for example, the reduction in the wireless signal radiation efficiency exceeds a preset threshold, it can be determined that the first end 111 is held; when an excitation signal is fed to the first radiator 11 through the second feeding point 114, if it is detected that the wireless signal radiation efficiency of the antenna device 10 is significantly reduced, for example, the reduction in the wireless signal radiation efficiency exceeds a preset threshold, it can be determined that the second end 112 is held.

[0096] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0097] The antenna device, electronic device and antenna switching method provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: include: A first radiator, comprising a first end, a second end, and a first feeding point and a second feeding point disposed between the first end and the second end, wherein the second feeding point is located between the first feeding point and the second end; a second radiator, wherein a first gap is provided between one end of the second radiator and the first end, the second radiator is coupled to the first radiator through the first gap, and the other end of the second radiator is grounded; a third radiator, wherein a second gap is provided between one end of the third radiator and the second end, the third radiator is coupled to the first radiator through the second gap, and the other end of the third radiator is grounded; Wherein, when the first feeding point is fed with an excitation signal, the second feeding point is grounded, and the antenna device generates a first resonance mode and a second resonance mode, the first resonance mode is generated by the first radiator, the second resonance mode is generated by the first radiator and the second radiator, and in the second resonance mode, the resonance current intensity generated on the second radiator is greater than the resonance current intensity generated on the first radiator; When the excitation signal is fed into the second feeding point, the first feeding point is grounded, and the antenna device generates a third resonant mode and a fourth resonant mode. The third resonant mode is generated by the first radiator, and the fourth resonant mode is generated by the first radiator and the third radiator. In the fourth resonant mode, the resonant current intensity generated on the third radiator is greater than the resonant current intensity generated on the first radiator.

2. The antenna device according to claim 1, characterized in that: The first resonance mode and the third resonance mode are both half-wavelength modes of the first radiator; In the second resonance mode, the first radiator generates a quarter-wavelength mode from the first feeding point to the first end; In the fourth resonance mode, the first radiator generates a quarter-wavelength mode from the second feeding point to the second end.

3. The antenna device according to claim 1 or 2, characterized in that: Also includes: a first feed source, electrically connected to the first feed point via a first switch, the first switch being used to connect or disconnect the first feed source and the first feed point, the first feed source being used to provide the excitation signal; A first matching module has one end connected between the first switch and the first feeding point and the other end grounded.

4. The antenna device according to claim 3, characterized in that: The first matching module comprises: A plurality of first matching paths, each of which has a different impedance and is grounded; A first switching switch has one end connected between the first switch and the first feeding point, and the other end used to select and connect one of the plurality of first matching paths.

5. The antenna device according to claim 3, characterized in that: Also includes: a second feed source, electrically connected to the second feed point via a second switch, the second switch being used to connect or disconnect the second feed source and the second feed point, the second feed source being used to provide the excitation signal; The second matching module has one end connected between the second switch and the second feeding point and the other end grounded.

6. The antenna device according to claim 5, characterized in that The second matching module includes: A plurality of second matching paths, each of which has a different impedance and is grounded; A second switching switch has one end connected between the second switch and the second feeding point, and the other end used to select and connect one of the plurality of second matching paths.

7. The antenna device according to claim 5, characterized in that: When the first switch is turned on, the second switch is turned off, so that the first feed source feeds the excitation signal through the first feeding point and the second feeding point is grounded; When the second switch is turned on, the first switch is turned off, so that the second feed source feeds the excitation signal through the second feeding point and the first feeding point is grounded.

8. The antenna device according to claim 1 or 2, characterized in that: Also includes: A third matching module, the other end of the second radiator is grounded through the third matching module.

9. The antenna device according to claim 1 or 2, characterized in that: Also includes: A fourth matching module, wherein the other end of the third radiator is grounded through the fourth matching module.

10. An electronic device, characterized in that: The invention comprises the antenna device according to any one of claims 1 to 9.

11. The electronic device according to claim 10, characterized in that: The antenna device further comprises a processor, the processor being electrically connected to the antenna device, and the processor being configured to: Controlling the first feeding point to feed the excitation signal to the first radiator, and controlling the second feeding point to be grounded; or The excitation signal is controlled to be fed into the first radiator through the second feeding point, and the first feeding point is controlled to be grounded.

12. An antenna switching method, characterized in that: Applied to the electronic device according to claim 10 or 11, the antenna switching method comprises: When feeding the excitation signal to the first radiator through the first feeding point, determining whether the first end is held, and if the first end is held, switching to feeding the excitation signal to the first radiator through the second feeding point; or When the excitation signal is fed to the first radiator through the second feeding point, it is determined whether the second end is held; if the second end is held, the excitation signal is fed to the first radiator through the first feeding point.

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