Antenna device and electronic device

Abstract

The application provides an antenna device and an electronic device. The antenna radiator of the antenna device comprises a first end, a first feeding point, a second feeding point and a grounded second end. A first feed source is electrically connected to the first feeding point and used to excite the antenna radiator to generate a first resonant mode and support the transmission and reception of a first wireless signal. A second feed source is electrically connected to the second feeding point and used to excite the antenna radiator to generate a second resonant mode and form at least one first current strong point area on the antenna radiator. The second resonant mode is used to support the transmission and reception of a second wireless signal. The first feeding point is arranged in a first current strong point area to increase the isolation between the first wireless signal and the second wireless signal. Based on this, the antenna device of the application can ensure the radiation performance of the first wireless signal and the second wireless signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and particularly relates to an antenna device and an electronic device. BACKGROUND

[0002] With the development of communication technology, electronic devices such as smart phones can implement more and more functions, and the communication modes of the electronic devices are more diversified. It can be understood that each communication mode needs a corresponding antenna to support.

[0003] However, with the development of electronic technology, electronic devices are increasingly miniaturized and thinned, and the internal space of the electronic devices is increasingly small, so how to reasonably arrange the antennas of the electronic devices becomes a problem. SUMMARY

[0004] The present application provides an antenna device and an electronic device, which can realize the miniaturized design of the antenna device and guarantee the radiation performance of the antenna device.

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

[0006] an antenna radiator comprising a first end and a second end, and a first feeding point and a second feeding point between the first end and the second end, the second end being grounded;

[0007] a first feed source electrically connected to the first feeding point, the first feed source being used to excite the antenna radiator to generate a first resonant mode and support the transmission and reception of a first wireless signal; and

[0008] a second feed source electrically connected to the second feeding point, the second feed source being used to excite the antenna radiator to generate a second resonant mode and form at least one first current strong point area on the antenna radiator, the second resonant mode being used to support the transmission and reception of a second wireless signal.

[0009] The first feeding point is arranged in one of the first current strong point areas to increase the isolation between the first wireless signal and the second wireless signal.

[0010] In a second aspect, the present application provides an electronic device comprising the antenna device as described above.

[0011] The antenna device and the electronic device, the first feed source of the antenna device is electrically connected to the first feeding point of the antenna radiator and can excite the antenna radiator to generate a first resonant mode and support a first wireless signal, the second feed source can excite the antenna radiator to generate a second resonant mode and support a second wireless signal, the antenna device can support at least two kinds of wireless signals by using the same antenna radiator, and the antenna device can realize miniaturization design. Moreover, the first feeding point can be arranged at a first current strong point area of the second resonant mode, when the first feed source is electrically connected to the first feeding point and excites the antenna radiator to generate the first resonant mode, the isolation between the first wireless signal supported by the first resonant mode and the second wireless signal supported by the second resonant mode is better, the interference between the first wireless signal and the second wireless signal is smaller, and the radiation performance of the antenna device is better.

[0012] Moreover, when the antenna device further comprises a switching circuit, under the switching action of the switching circuit, the first resonant mode excited by the first feed source can support the transmission and reception of the first wireless signal of different frequency bands, so that the antenna device can support the transmission and reception of more frequency bands of wireless signals, and the application scenarios of the antenna device are more extensive. At the same time, when the electrically connected point of the switching circuit to the antenna radiator is a first current strong point area formed by the second resonant mode excited by the second feed source on the antenna radiator, if the switching circuit performs switching operation, the switching circuit is difficult to affect the electric field of the second resonant mode, the frequency offset of the second wireless signal is not easy to generate, and the radiation performance of the second radiator can be guaranteed. Therefore, the antenna device of the application can reuse the same antenna radiator to realize the transmission and reception of the first wireless signal and the second wireless signal, and can also guarantee the radiation performance of the second wireless signal when the first wireless signal switches between different frequency bands. The entire antenna device can realize miniaturization design, and can also guarantee the antenna performance of the first wireless signal and the second wireless signal. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creating laborious work.

[0014] Figure 1 The first structure schematic diagram of the antenna device provided by the embodiment of the application.

[0015] Figure 2 For Figure 1 The current distribution schematic diagram of the second resonant mode of the antenna device shown.

[0016] Figure 3 The second structure schematic diagram of the antenna device provided by the embodiment of the application.

[0017] Figure 4 A current flow diagram of a second resonant mode of the antenna device shown in Figure 3

[0018] Figure 5 A current distribution diagram of a first resonant mode of the antenna device shown in Figure 3

[0019] Figure 6 A current flow diagram of a first resonant mode of the antenna device shown in Figure 3

[0020] Figure 7 A current flow diagram of a third resonant mode of the antenna device shown in Figure 3

[0021] Figure 8 A current flow diagram of a fourth resonant mode of the antenna device shown in Figure 3

[0022] Figure 9 A third structural diagram of the antenna device provided by the embodiment of the present application.

[0023] Figure 10 A connection diagram of the antenna device shown in Figure 9

[0024] Figure 11 An S parameter and isolation degree curve diagram of the antenna device provided by the embodiment of the present application.

[0025] Figure 12 An S parameter and isolation degree curve diagram when the switching circuit of the antenna device of the embodiment of the present application performs switching operation.

[0026] Figure 13 A structural diagram of an antenna device in the related art.

[0027] Figure 14 An antenna efficiency comparison curve diagram of the antenna device of the present application and the antenna device in the related art shown in Figure 13

[0028] A first structural diagram of the electronic device provided by the embodiment of the present application. Figure 15

[0029] A second structural diagram of the electronic device provided by the embodiment of the present application. Figure 16 DETAILED DESCRIPTION

[0030] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, will show embodiments of the application.​​​​​​​Figure 1 To the attached Figure 16 The technical solutions in the embodiments of the present application are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] The embodiments of the present application provide an antenna device 100 and an electronic device. The antenna device 100 can realize wireless communication function. For example, the antenna device 100 can transmit wireless fidelity (Wi-Fi) signal, global positioning system (GPS) signal, 3rd-Generation (3G) signal, 4th-Generation (4G) signal, 5th-Generation (5G) signal, near field communication (NFC) signal, Blue tooth (BT) signal, ultra wide band (UWB) signal, etc.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 The first structure schematic diagram of the antenna device 100 provided by the embodiments of the present application is shown in Figure 2 is Figure 1 The second resonance mode of the antenna device 100 is shown in the current distribution schematic diagram. The antenna device 100 includes an antenna radiator 110, a first feed source 120, a second feed source 140 and a ground system 150.

[0033] The antenna radiator 110 includes a first end 111, a second end 112, a first feeding point 114 and a second feeding point 115, the first feeding point 114 and the second feeding point 115 can be arranged between the first end 111 and the second end 112, the second end 112 can be electrically connected with the ground system 150 to realize grounding, the second end 112 can be a grounding end of the antenna radiator 110, and correspondingly, the first end 111 can be a free end (also referred to as a terminal end, an open end or an open circuit end) of the antenna radiator 110. The first feed source 120 can be directly or indirectly electrically connected with the first feeding point 114 to realize electrical connection with the antenna radiator 110, the first feed source 120 and the antenna radiator 110 can form a first antenna, the first feed source 120 can feed a first excitation signal to the antenna radiator 110 to excite the antenna radiator 110 to generate a first resonant mode and support the transmission and reception (transmission and reception include reception and transmission, which will not be repeated hereinafter) of a first wireless signal. The second feed source 140 can be directly or indirectly electrically connected with the second feeding point 115 to realize electrical connection with the antenna radiator 110, the second feed source 140 and the antenna radiator 110 can form a second antenna, the second feed source 140 can feed a second excitation signal to the antenna radiator 110 to excite the antenna radiator 110 to generate a second resonant mode and form at least one first current strong point region A1 on the antenna radiator 110, the second resonant mode is used to support the transmission and reception of a second wireless signal. Wherein, the first feeding point 114 of the antenna radiator 110 can be arranged in a first current strong point region A1 to increase the isolation between the first wireless signal supported by the first resonant mode and the second wireless signal supported by the second resonant mode.

[0034] It can be understood that the ground system 150 can be a component of the antenna device 100 or the electronic device, and the ground system 150 can form a common ground of the antenna device 100 or the electronic device. The ground system 150 can be a plane or a structure with an electric potential of zero. The ground system 150 can be formed by a conductor, a printed line or a metal printed layer in the antenna device 100 or the electronic device; or the ground system 150 can be formed on a mainboard, a small board or other bearing plate of the antenna device 100 or the electronic device; or the ground system 150 can also be formed on a frame of the antenna device 100 or the electronic device. The embodiments of the present application do not limit the specific arrangement position of the ground system 150.

[0035] It can be understood that the antenna radiator 110 is a conductor structure capable of supporting wireless signal transmission and reception. The first feed 120 and the second feed 140 are signal sources of the antenna device 100. Under the excitation of the first feed 120 and the second feed 140, the antenna radiator 110 can at least transmit and receive the first wireless signal and the second wireless signal. The antenna radiator 110 can be, but is not limited to, a metal branch radiator, a printed circuit board radiator, a flexible circuit board radiator, a silver paste spraying radiator, etc. The antenna radiator 110 can be, but is not limited to, a straight strip type or a bent type, and the embodiments of the present application do not limit the forming mode and specific structure of the antenna radiator 110.

[0036] It can be understood that, in order to improve the isolation between the first wireless signal and the second wireless signal, the first feed point 114 of the antenna radiator 110 can be arranged at a first current strong point area A1 formed by the second resonant mode on the antenna radiator 110. The so-called current strong point area refers to an area with the maximum current intensity formed by the resonant current of the resonant mode on the radiator. Since the resonant current generated by the resonant mode is a periodic excitation current, the resonant current can generate one or more current strong point areas on the radiator. In the current simulation diagram, one or several areas with the deepest color are often the current strong point areas generated by the resonant current on the antenna radiator 110. Since the current strong point area is also an electric field weak point area, when the first feed point 114 is arranged at a current strong point area formed by the second resonant mode on the antenna radiator 110, the interference between the first feed 120 and the second feed 140 electrically connected to the first feed point 114 is small, and the isolation between the first feed 120 and the second feed 140 is good.

[0037] It can be understood that the first feed point 114 and the second feed point 115 of the antenna radiator 110 can be arranged at intervals to avoid mutual interference between the first excitation signal of the first feed 120 and the second excitation signal of the second feed 140. For example, the distance between the second feed point 115 and the second end 112 can be smaller than the distance between the second feed point 115 and the first feed point 114, the second feed point 115 can be arranged close to the grounded second end 112, and the distance between the second feed point 115 and the first feed point 114 can be far away, so as to avoid mutual interference between the first feed 120 and the second feed 140, thereby further improving the isolation between the first wireless signal and the second wireless signal. Of course, the first feed point 114 and the second feed point 115 can also have other positional relationships, and the specific arrangement positions of the two feed points are not limited in the embodiments of the present application.

[0038] It can be understood that the first wireless signal and the second wireless signal can be, but are not limited to, a cellular signal, a Wi-Fi signal, a Bluetooth signal, an NFC signal, and a UWB signal. For example, the first wireless signal can be a low frequency band (LB signal, frequency range less than 1000 MHz), and the second wireless signal can be an N78 frequency band (3400-3600 MHz) signal. The first wireless signal and the second wireless signal are far apart in the frequency spectrum, which can further improve the isolation between the two. Of course, the first wireless signal and the second wireless signal can also be other signals, for example, but not limited to, the first wireless signal and the second wireless signal are wireless signals with close frequencies. Since the first feeding point 114 is arranged at a first current strong point area A1 formed by the second resonant mode on the antenna radiator 110, the first wireless signal and the second wireless signal still have good isolation. The embodiments of the present application do not specifically limit the first wireless signal and the second wireless signal.

[0039] The antenna device 100 according to the embodiments of the present application, the first feed source 120 is electrically connected to the first feeding point 114 of the antenna radiator 110 and can excite the antenna radiator 110 to generate a first resonant mode and support a first wireless signal. The second feed source 140 can excite the antenna radiator 110 to generate a second resonant mode and support a second wireless signal. The antenna device 100 can support at least two wireless signals using the same antenna radiator 110, and the antenna device 100 can be designed to be small in size. Moreover, the first feeding point 114 is arranged at a first current strong point area A1 of the second resonant mode. When the first feed source 120 is electrically connected to the first feeding point 114 and excites the antenna radiator 110 to generate the first resonant mode, the isolation between the first wireless signal supported by the first resonant mode and the second wireless signal supported by the second resonant mode is good, the interference between the first wireless signal and the second wireless signal is small, and the radiation performance of the antenna device 100 is better.

[0040] Among them, please combine Figure 1 and Figure 2 Please refer to Figure 3 , Figure 3 The second structure diagram of the antenna device 100 provided by the embodiments of the present application. The antenna device 100 can also include a switching circuit 130.

[0041] The switching circuit 130 can be electrically connected to the antenna radiator 110 and grounded. The antenna radiator 110 can further include an electrical connection point 113, which can be located between the first end 111 and the second end 112. One end of the switching circuit 130 can be electrically connected to the electrical connection point 113, and the other end of the switching circuit 130 can be electrically connected to the ground system 150 to achieve grounding. The electrical connection point 113 is arranged at a first current strong point area A1 formed by the second resonant mode on the antenna radiator 110, so that, under the switching action of the switching circuit 130, the first resonant mode generated by the first feed source 120 exciting the antenna radiator 110 supports the transceiving of the first wireless signal of different frequency bands, and the second resonant mode supports the transceiving of the second wireless signal of the same frequency band.

[0042] It can be understood that the switching circuit 130 can change the effective electrical length of the antenna radiator 110. The so-called effective electrical length refers to the equivalent length of the radiator when radiating a signal, or the equivalent length required for electromagnetic wave transmission in the radiating structure. The electrical length of the radiator can be greater than, less than, or equal to the branch length. The electrical length of the radiator can be associated with the frequency supported by the radiator. When the electrical length of the radiator is longer, the radiator can support a wireless signal with a lower frequency. When the electrical length of the radiator is shorter, the radiator can support a wireless signal with a higher frequency. The radiator can change its electrical length by electrically connecting circuits with different impedances. The switching circuit 130 can include, but is not limited to, multiple switching branches. The switching circuit 130 can switch between the multiple switching branches to adjust the frequency band of the first wireless signal. Each switching branch can include, but is not limited to, one or more capacitors, inductors, switches, etc. in series or parallel. The embodiments of the present application do not limit the specific structure of the switching circuit 130.

[0043] It can be understood that when the switching circuit 130 switches between different switching branches, the antenna radiator 110 can have different effective electrical lengths, so that the first resonant mode generated by the first feed source 120 exciting the antenna radiator 110 can support the transceiving of the first wireless signal of different frequency bands. Since the first antenna and the second antenna multiplex the same antenna radiator 110 to support the transceiving of the wireless signal, when the switching circuit 130 switches the frequency band of the first wireless signal supported by the first resonant mode generated by the first feed source 120, the switching circuit 130 will also affect the resonant mode, for example, the second resonant mode, generated by the second feed source 140. The switching circuit 130 can cause the frequency band of the second wireless signal supported by the second resonant mode to deviate, thereby affecting the antenna performance of the second wireless signal.

[0044] In order to avoid the switching circuit 130 affecting the frequency band of the second wireless signal when switching the frequency band of the first wireless signal, the electric connection point 113 of the switching circuit 130 electrically connected to the antenna radiator 110 is arranged at a first current strong point area A1 formed by the second resonant mode on the antenna radiator 110. When the switching circuit 130 switches the different frequency bands of the first wireless signal, the switching operation of the switching circuit 130 is difficult to affect the electric field of the second resonant mode because the current strong point area is also an electric field weak point area, so that the switching operation of the switching circuit 130 is not easy to affect the second wireless signal supported by the second resonant mode, the second wireless signal is not easy to produce frequency deviation, and the radiation performance of the second wireless signal can be ensured.

[0045] It can be understood that when the second resonant mode forms one or more (two or more) first current strong point areas A1 on the antenna radiator 110, the first feeding point 114 and the electric connection point 113 of the antenna radiator 110 can overlap and be located at the same first current strong point area A1 formed by the second resonant mode on the antenna radiator 110. Of course, if the second resonant mode forms multiple first current strong point areas A1 on the antenna radiator 110, the first feeding point 114 can be located at one of the first current strong point areas A1, and the electric connection point 113 can be located at another of the first current strong point areas A1.

[0046] The antenna device 100 of the present application can support the transceiving of wireless signals of more frequency bands under the switching action of the switching circuit 130, and the application scenarios of the antenna device 100 are more extensive. At the same time, the electric connection point 113 of the switching circuit 130 electrically connected to the antenna radiator 110 is arranged at the first current strong point area A1 formed by the second resonant mode on the antenna radiator 110, so that the switching circuit 130 is difficult to affect the electric field of the second resonant mode when performing the switching operation, the second wireless signal is not easy to produce frequency deviation, and the radiation performance of the second resonant mode can be ensured. Therefore, the antenna device 100 of the present application can not only reuse the same antenna radiator 110 to realize the transceiving of the first wireless signal and the second wireless signal, but also can ensure the radiation performance of the second wireless signal when the first wireless signal switches between different frequency bands. The entire antenna device 100 can not only realize the miniaturization design, but also can ensure the antenna performance of the first wireless signal and the second wireless signal.

[0047] In the above description, the first wireless signal and the second wireless signal are taken as examples for description, but the present application is not limited thereto. For example, the first wireless signal and the second wireless signal can be replaced by a first wireless signal and a second wireless signal, or a first wireless signal and a third wireless signal. Figures 1 to 3 For example, the first wireless signal and the second wireless signal can be replaced by a first wireless signal and a second wireless signal, or a first wireless signal and a third wireless signal. Figure 4 For example, the first wireless signal and the second wireless signal can be replaced by a first wireless signal and a second wireless signal, or a first wireless signal and a third wireless signal. Figure 4 For example, the first wireless signal and the second wireless signal can be replaced by a first wireless signal and a second wireless signal, or a first wireless signal and a third wireless signal. Figure 3A current flow diagram of a second resonant mode of the antenna device 100 is shown. The second resonant mode generated by the second feed source 140 exciting the antenna radiator 110 can be a three-quarter resonant mode, and the second feed source 140 can excite the antenna radiator 110 to support the transceiving of the second wireless signal in the three-quarter resonant mode. As shown in Figure 2 and Figure 4 shown, the resonant current generated by the second resonant mode, for example, the second resonant current I2, can form a first current strong point region A1 and a first current zero point region B1 on the antenna radiator 110, and the first current zero point region B1 is located between the first current strong point region A1 and the second end 112. Since the second end 112 is grounded, the second end 112 can also be a current strong point region, and correspondingly, the first end 111 can be a current zero point region, and the first current strong point region A1 can be a current strong point region generated by the second resonant mode other than the second end 112. The so-called current zero point region refers to a region on the radiator where the current intensity of the resonant current is the weakest. Since the resonant current is a periodic excitation current, the resonant current can form one or more current zero point regions on the radiator, and the region with the lightest color in the current simulation diagram is the current zero point region. As shown in Figure 2 and Figure 4 shown, the second resonant current I2 generated by the second resonant mode can flow in the direction from the first end 111 to the first current zero point region B1 and in the direction from the second end 112 to the first current zero point region B1, and the second feed source 140 can excite the antenna radiator 110 to generate the second resonant mode in the three-quarter resonant mode. Among them, the first feed point 114 can be arranged at the first current strong point region A1 to improve the isolation of the first wireless signal and the second wireless signal; and the electrical connection point 113 at which the switching circuit 130 is electrically connected to the antenna radiator 110 can also be arranged at the first current strong point region A1, so that the switching operation of the switching circuit 130 can not affect the second wireless signal supported by the second resonant mode.

[0048] It can be understood that the second feed source 140 can also excite the antenna radiator 110 to generate a second resonant mode of other resonant modes, for example, but not limited to, the second feed source 140 can excite the antenna radiator 110 to generate a five-quarter resonant mode, a one-half resonant mode, etc. The specific mode of the second resonant mode is not limited in the embodiments of the present application, and any resonant mode scheme that can form at least one first current strong point region A1 on the antenna radiator 110 is within the protection scope of the embodiments of the present application.

[0049] Among them, please refer to Figures 1 to 3 and Figure 5 and Figure 6 , Figure 5 as shown in Figure 3 a current distribution diagram of a first resonant mode of the antenna device 100 is shown,Figure 6 for Figure 3 The diagram shows a current flow pattern for the first resonant mode of the antenna device 100. The first resonant mode generated by the first feed 120 exciting the antenna radiator 110 can be a quarter-resonant mode. The first feed 120 can excite the antenna radiator 110 to support the transmission and reception of the first wireless signal in a quarter-resonant mode.

[0050] like Figure 5 and Figure 6 As shown, the resonant current generated by the first resonant mode, such as the first resonant current I1, can flow on the antenna radiator 110 along the direction from the second end 112 to the first end 111. The second end 112 can be the region where the first resonant current I1 is strong, and the first end 111 can be the region where the first resonant current I1 is zero. Furthermore, as... Figure 6 As shown, the current intensity of the first resonant current I1 distributed between the second end 112 and the first feed point 114 can be greater than the current intensity of the first resonant current I1 distributed between the first feed point 114 and the first end 111, so that the first resonant current I1 can be mainly distributed between the second end 112 and the first feed point 114.

[0051] It is understandable that when the first feed source 120 excites the antenna radiator 110 to support the transmission and reception of the first wireless signal in a quarter-resonance mode, and the second feed source 140 excites the antenna radiator 110 to support the transmission and reception of the second wireless signal in a three-quarter resonance mode, the antenna radiator 110 can support the first wireless signal and the second wireless signal respectively in different resonance modes under the excitation of the two feed sources, which can reduce the interference between the two signals. Furthermore, when the second feed source 140 supports the second wireless signal in a three-quarter resonance mode, the first current strong point region A1 generated by this three-quarter resonance mode can be closer to the first end 111 and farther away from the second end 112. When the first feed source 120 and the switching circuit 130 are connected to the same point of the antenna radiator 110 (i.e., the first feed point 114 and the electrical connection point 113 coincide), and the second feed source 140 is electrically connected to the grounded second end 112, the distance between the first feed point 114 and the second feed point 115 is greater, which can further reduce the interference between the first wireless signal and the second wireless signal.

[0052] It should be noted that the first feed source 120 can also excite the antenna radiator 110 to generate other resonance modes, such as, but not limited to, the first feed source 120 can excite the antenna radiator 110 to generate a half resonance mode or a quarter resonance mode. The specific method of the first resonance mode is not limited in the embodiments of this application.

[0053] The second feed 140 can also excite the antenna radiator 110 to generate a third resonant mode and support the transmission and reception of a third wireless signal. For example, please refer to...Figures 1 to 3 Referring to Figure 7 , Figure 7 As shown in FIG. 1, the antenna device 100 includes an antenna radiator 110, a first feed source 120, a second feed source 140, and a switch circuit 130. Figure 3 FIG. 2 shows a current flow diagram of a third resonant mode of the antenna device 100. The second excitation signal fed into the antenna radiator 110 by the second feed source 140 can also excite the antenna radiator 110 to generate a third resonant mode different from the second resonant mode, so that the third wireless signal supported by the antenna radiator 110 can be different from the second wireless signal.

[0054] It can be understood that the third wireless signal can be, but is not limited to, a cellular signal, a Wi-Fi signal, a Bluetooth signal, an NFC signal, and a UWB signal. For example, the third wireless signal can be a 5G Wi-Fi signal. Embodiments of the present application do not specifically limit the third wireless signal.

[0055] It can be understood that the third resonant current I3 generated by the third resonant mode can form at least one second current strong point area A2 on the antenna radiator 110. The electrically connected point 113 of the switch circuit 130 electrically connected to the antenna radiator 110 can be arranged on a current strong point area (which is not the second end 112) where the at least one first current strong point area A1 and the at least one second current strong point area A2 overlap, that is, the switch circuit 130 can be electrically connected to the current strong point area of the second resonant current I2 and the current strong point area of the third resonant current I3 at the same time. At this time, when the switch circuit 130 switches between different switching branches to make the first resonant mode support the first wireless signal of different frequency bands, the switching operation of the switch circuit 130 will not affect the second wireless signal and the third wireless signal, and the second wireless signal and the third wireless signal are not easy to produce frequency deviation, which can ensure the antenna performance of the second wireless signal and the third wireless signal.

[0056] It can be understood that the third resonant mode generated by the second feed source 140 to excite the antenna radiator 110 can be a five-quarter resonant mode, and the second feed source 140 can excite the antenna radiator 110 to support the transmission and reception of the third wireless signal in the five-quarter resonant mode. As shown in FIG. 3, the second feed source 140 can be electrically connected to the switch circuit 130 through a first feed line 141 and a second feed line 142. Figure 7As shown, the third resonance mode can form two current zero point regions, such as the second current zero point region B2 and the third current zero point region B3, and two second current strong point regions A2, such as the second current strong point region A2a and the second current strong point region A2b, on the antenna radiator 110. One second current strong point region A2a, the second current zero point region B2, another second current strong point region A2b and the third current zero point region B3 can be sequentially arranged between the first end 111 and the second end 112. At this time, the second end 112 is a current strong point region, and the first end 111 can be a current zero point region. The third resonance current I3 generated by the third resonance mode can flow in the direction from the second current zero point region B2 to the first end 111, in the direction from the second current zero point region B2 to the third current zero point region B3, and in the direction from the second end 112 to the third current zero point region B3.

[0057] It can be understood that when the second feed source 140 excites the antenna radiator 110 to support the second wireless signal in the three-quarter resonance mode and to support the third wireless signal in the five-quarter resonance mode, the resonance current strong points of the three-quarter resonance mode and the five-quarter resonance mode are more likely to coincide, and a suitable region for setting the electrical connection point 113 can be more easily found on the antenna radiator 110, so that the switching operation of the switching circuit 130 does not affect the second wireless signal and the third wireless signal at the same time.

[0058] It can be understood that the second feed source 140 can also excite the antenna radiator 110 to generate a third resonance mode of other resonance modes, such as but not limited to a one-quarter resonance mode. The specific mode of the third resonance mode is not limited in the embodiments of the present application.

[0059] The antenna device 100 in the embodiments of the present application, the second feed source 140 excites the antenna radiator 110 to support the second wireless signal and the third wireless signal in the three-quarter resonance mode and the five-quarter resonance mode, the resonance modes of the two wireless signals are different, which can reduce the interference between the two wireless signals; at the same time, the electrical connection point 113 of the switching circuit 130 is arranged in the current strong point region common to the three-quarter resonance mode and the five-quarter resonance mode, the switching circuit 130 is not easy to interfere with the second wireless signal and the third wireless signal, and the antenna performance of the two wireless signals can be further ensured.

[0060] The first feed source 120 of the antenna device 100 can also excite the antenna radiator 110 to generate a fourth resonance mode and support the transmission and reception of a fourth wireless signal. The fourth wireless signal can be different from the first wireless signal, and the fourth wireless signal can also be different from the second wireless signal and the third wireless signal. For example, the fourth wireless signal can be but is not limited to a 2.4G Wi-Fi signal. The fourth wireless signal is not limited in the embodiments of the present application.

[0061] It can be understood that please combine Figures 1 to 3 And please refer to Figure 8 , Figure 8 As Figure 3 A current flow diagram of a fourth resonant mode of the antenna device 100 is shown. The fourth resonant mode generated by the first feed source 120 exciting the antenna radiator 110 can be a monopole resonant mode. The first feed source 120 can excite the antenna radiator 110 to support the fourth wireless signal in the fourth resonant mode of the monopole resonant mode. The fourth resonant current I4 generated by the fourth resonant mode can flow in the direction from the first end 111 to the second end 112, and the current intensity of the fourth resonant current I4 distributed between the first end 111 and the first feed point 114 is greater than the current intensity of the fourth resonant current I4 distributed between the first feed point 114 and the second end 112, so that the antenna radiator 110 mainly supports the fourth wireless signal in the radiation section between the first end 111 and the first feed point 114, and the fourth resonant current I4 can be mainly distributed between the first end 111 and the first feed point 114.

[0062] It can be understood that the fourth resonant mode of the monopole resonant mode is different from the first resonant mode of the quarter resonant mode, and the current intensity of the fourth resonant current I4 of the fourth resonant mode between the first end 111 and the first feed point 114 is greater, while the current intensity of the first resonant current I1 of the first resonant mode between the second end 112 and the first feed point 114 is greater, so that the current intensity of the first resonant current I1 and the fourth resonant current I4 is greater in the region separated from each other, and the first resonant mode and the fourth resonant mode are not easy to interfere with each other, which can ensure the isolation of the first wireless signal and the fourth wireless signal and reduce the interference between the first wireless signal and the fourth wireless signal.

[0063] It should be noted that the first feed source 120 can also excite the fourth resonant mode to support the fourth wireless signal in other resonant modes such as but not limited to the half resonant mode and the three-quarter resonant mode, and the specific resonant mode of the fourth resonant mode is not limited in the present application.

[0064] Wherein, in order to further reduce the influence of the switching circuit 130 on the fourth wireless signal, please refer to Figure 9 , Figure 9 A third structure diagram of the antenna device 100 provided by the embodiment of the present application is shown. The antenna device 100 can further include a filtering circuit 160.

[0065] The filter circuit 160 can be electrically connected to the switching circuit 130 directly or indirectly. For example, the filter circuit 160 can be electrically connected between the antenna radiator 110 and the switching circuit 130, one end of the filter circuit 160 can be electrically connected to the antenna radiator 110 (e.g., the electrical connection point 113), the other end of the filter circuit 160 can be electrically connected to one end of the switching circuit 130, and the other end of the switching circuit 130 can be electrically connected to the ground system 150 to achieve grounding. For another example, the filter circuit 160 can be electrically connected between the switching circuit 130 and the ground system 150, one end of the switching circuit 130 can be electrically connected to the antenna radiator 110, one end of the filter circuit 160 can be electrically connected to the other end of the switching circuit 130, and the other end of the filter circuit 160 can be electrically connected to the ground system 150 to achieve grounding. The embodiments of the present application do not limit this.

[0066] It can be understood that the filter circuit 160 can include, but is not limited to, capacitors, inductors and the like. For example, please refer to Figure 10 , Figure 10 For Figure 9 , an electrical connection diagram of the antenna device 100 is shown. The filter circuit 160 can include a first inductive element 161 and a first capacitive element 162, the first inductive element 161 and the first capacitive element 162 can be connected to each other in parallel, and one end of the first inductive element 161 and the first capacitive element 162 connected in parallel can be electrically connected to the antenna radiator 110, for example, the electrical connection point 113 of the antenna radiator 110, and the other end of the first inductive element 161 and the first capacitive element 162 connected in parallel can be electrically connected to one end of the switching circuit 130. The switching circuit 130 can include a switching switch 131, a second inductive element 132, a second capacitive element 133 and a third inductive element 134, one end of the second inductive element 132, one end of the second capacitive element 133 and one end of the third inductive element 134 can be electrically connected to the other end of the first inductive element 161 and the first capacitive element 162 connected in parallel, the other end of the second inductive element 132, the other end of the second capacitive element 133 and the other end of the third inductive element 134 can be electrically connected to one end of the switching switch 131, and one end of the switching switch 131 can be grounded. The switching switch 131 can select the second inductive element 132, the second capacitive element 133 or the third inductive element 134 to be grounded, so that the antenna radiator 110 can support different frequency bands of the first wireless signal.

[0067] It should be noted that the above is only an exemplary description of the filter circuit 160 and the switching circuit 130, and the filter circuit 160 and the switching circuit 130 can also have other structures, which are not limited by the embodiments of the present application.

[0068] It can be understood that the filter circuit 160 is configured to allow the first resonant current I1 formed by the first resonant mode to pass through the switching circuit 130 and the filter circuit 160 to return to the ground, and is configured to block the fourth resonant current I4 formed by the fourth resonant mode from passing through the switching circuit 130 and the filter circuit 160 to return to the ground. When the first feed source 120 excites the antenna radiator 110 to generate the first resonant mode and the fourth resonant mode, the first resonant current I1 generated by the first resonant mode can pass through the filter circuit 160 and the switching circuit 130 to return to the ground, and can be affected by the switching circuit 130 so that the first resonant mode makes the antenna radiator 110 have a different equivalent electrical length, so that the first resonant mode can support the first wireless signal of different frequency bands. At the same time, the fourth resonant current I4 generated by the fourth resonant mode is not easy to pass through the filter circuit 160 and the switching circuit 130 to return to the ground, and the switching circuit 130 is not easy to affect the effective electrical length of the fourth resonant mode, so that the switching operation of the switching circuit 130 can not affect the fourth wireless signal supported by the fourth resonant mode, and the fourth wireless signal basically does not generate frequency offset.

[0069] It can be understood that the filter circuit 160 can also block the resonant current formed by the resonant mode generated by the second feed source 140 exciting the antenna radiator 110 from passing through the switching circuit 130 and the filter circuit 160 to return to the ground. For example, the filter circuit 160 can also block the second resonant current I2 and the third resonant current I3 from passing through the switching circuit 130 and the filter circuit 160 to return to the ground, so that the switching operation of the switching circuit 130 is not easy to affect the second wireless signal supported by the second resonant mode, and is not easy to affect the third wireless signal supported by the third resonant mode, and the second wireless signal and the third wireless signal basically do not generate frequency offset.

[0070] For example, please refer to Figure 11 , Figure 11 The S parameter and isolation degree curve diagram of the antenna device 100 provided by the embodiment of the present application. Figure 11 The curve S1 is the S parameter curve of the first antenna formed by the first feed source 120 and the antenna radiator 110 (and the switching circuit 130) when working, the curve S2 is the S parameter curve of the second antenna formed by the second feed source 140 and the antenna radiator 110 when working, and the curve S3 is the isolation degree curve between the first antenna and the second antenna when working. As can be seen from the curve S1, the first feed source 120 can excite the antenna radiator 110 to generate the first resonant mode and the fourth resonant mode, so that the first antenna can support the first wireless signal and the fourth wireless signal. As can be seen from the curve S2, the second feed source 140 can excite the antenna radiator 110 to generate the second resonant mode and the third resonant mode, so that the second antenna can support the second wireless signal and the third wireless signal. As can be seen from the wireless S3, the isolation degree between the first antenna and the second antenna is also better. Therefore, by the antenna device 100 provided by the embodiment of the present application, the first antenna and the second antenna can be formed by the same antenna radiator 110, and the first antenna and the second antenna can be formed by different antenna radiators 110, and the first antenna and the second antenna can be formed by the same antenna radiator 110 and different antenna radiators 110. Figure 11It can be seen that the antenna radiator 110 of the embodiment of the present application can support four different wireless signals, and the mutual interference between the wireless signals is low.

[0071] Please refer to Figure 11 and refer to Figure 12 , Figure 12 The S parameter and isolation curve diagram when the switching circuit 130 of the antenna device 100 of the embodiment of the present application performs the switching operation. Figure 12 The curves S4 to S6 in the figure are the S parameter curves of the antenna device 100 when the switching circuit 130 switches among the three switching branches. As can be seen from each of the curves S4 to S6, the antenna device 100 can simultaneously generate four resonance modes and support four wireless signals under the action of the first feed 120 and the second feed 140. Among them, as can be seen from the M1 region in the figure Figure 12 , when the switching circuit 130 performs the switching operation, the first resonance mode can excite the antenna radiator 110 to support the first wireless signal of different frequency bands; as can be seen from the M2 region in the figure Figure 12 , when the switching circuit 130 performs the switching operation, the fourth resonance mode excites the antenna radiator 110 to support the fourth wireless signal, and the frequency band of the fourth wireless signal only has slight changes; as can be seen from the M3 region and the M4 in the figure Figure 12 , when the switching circuit 130 performs the switching operation, the second resonance mode excites the antenna radiator 110 to support the second wireless signal, and the third resonance mode excites the antenna radiator 110 to support the third wireless signal, and there is no frequency deviation. As can be seen from the M1 region in the figure Figure 12 , it can be seen that the switching circuit 130 of the present application basically has no effect on the second wireless signal to the fourth wireless signal.

[0072] Moreover, the present application uses two feeds to respectively excite the antenna radiator 110 to support the transceiving of the second wireless signal and the first wireless signal. Compared with the scheme in the related art in which one feed is used to excite the antenna radiator 110 to support the first wireless signal and the second wireless signal, the radiation efficiency of the antenna device 100 of the present application is much higher than that of the antenna device 100 in the related art. For example, please refer to Figure 13 and Figure 14 , Figure 13 is a structure diagram of an antenna device 200 in the related art, Figure 14 is an antenna efficiency comparison curve diagram of the antenna device 100 of the present application and the antenna device 200 of the related art shown in Figure 13 .

[0073] Figure 13The antenna device 200 shown includes a feed 220 and a switching circuit 230 electrically connected to the antenna radiator 210. The feed 220 can excite the antenna radiator 210 to support a first wireless signal and a second wireless signal, and the switching circuit 230 can enable the antenna radiator 210 to support the first wireless signal in different frequency bands. Figure 14 As shown, curves S7 and S8 are respectively Figure 13 The radiation efficiency curve and system efficiency curve of the antenna device 200 in the related technology are shown. Curves S9 and S10 are the radiation efficiency curve and system efficiency curve of the first antenna of the antenna device 100 in this application embodiment when it is working. Curves S11 and S12 are the radiation efficiency curve and system efficiency curve of the second antenna of the antenna device 100 in this application embodiment when it is working. Comparing curves S7 to S12, it can be seen that the radiation efficiency and system efficiency of the antenna device 100 in this application embodiment are higher than those of the antenna device 200 in the related technology. Therefore, the multiple wireless signals supported by the antenna device 100 in this application embodiment have both better isolation performance and better antenna efficiency performance.

[0074] For the structure of the antenna device 100 described above, please refer to... Figure 15 , Figure 15 This is a schematic diagram of a first structure of an electronic device 10 provided in an embodiment of this application. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Figure 15 As shown, the electronic device 10 may also include a display screen 300, a mid-frame 400, a circuit board 500, a battery 600, and a back cover 700.

[0075] The display screen 300 is disposed on the mid-frame 400 to form the display surface of the electronic device 10 for displaying images, text, and other information. The display screen 300 may include a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display screen, among other types.

[0076] The middle frame 400 may include a side frame 410 and a middle plate 420. The side frame 410 may be a hollow frame structure forming the outer frame of the electronic device 10, and the middle plate 420 may be a thin plate or sheet structure. The middle frame 400 provides support for electronic devices or functional components in the electronic device 10, so as to mount the electronic devices or functional components of the electronic device 10 together. For example, the middle frame 400 may have structures such as grooves, protrusions, and through holes to facilitate the mounting of electronic devices or functional components of the electronic device 10. It is understood that the material of the middle frame 400 may include metal or plastic.

[0077] The circuit board 500 is arranged on the middle frame 400 to be fixed, and is sealed in the inside of the electronic device 10 by the rear shell 700. The circuit board 500 can be integrated with a processor, and in addition, one or more of the functional components such as a headphone interface, an acceleration sensor, a gyroscope, a motor, etc. can be integrated. At the same time, the display screen 300 can be electrically connected to the circuit board 500 to control the display of the display screen 300 by the processor on the circuit board 500.

[0078] The battery 600 is arranged on the middle frame 400 and is sealed in the inside of the electronic device 10 by the rear shell 700. At the same time, the battery 600 is electrically connected to the circuit board 500 to realize power supply of the electronic device 10 by the battery 600. The circuit board 500 can be provided with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 600 to each electronic device in the electronic device 10.

[0079] The rear shell 700 is connected with the middle frame 400. For example, the rear shell 700 can be attached to the middle frame 400 by an adhesive such as double-sided tape to realize the connection with the middle frame 400. The rear shell 700 is used to seal the electronic devices and functional components of the electronic device 10 in the electronic device 10 together with the middle frame 400 and the display screen 300 to form a protection effect on the electronic devices and functional components of the electronic device 10.

[0080] It can be understood that the ground system 150 of the embodiment of the present application can be formed on the rear shell 700, the circuit board 500 or the middle plate 420 of the middle frame 400. For example, a conductor region with zero potential can be arranged on the rear shell 700, the circuit board 500 or the middle plate 420, and the ground system 150 can be arranged on the conductor region.

[0081] It can be understood that one or more of the first feed source 120, the second feed source 140, the switching circuit 130 and the filter circuit 160 of the embodiment of the present application can be arranged on the circuit board 500, but are not limited to this. Of course, one or more of the above components can also be arranged on the small plate of the electronic device 10, and the specific arrangement position of the above structure is not limited in the embodiment of the present application.

[0082] It can be understood that the above is only an example of the electronic device 10, and the electronic device 10 of the embodiment of the present application can also include a camera, a sensor, an acoustic-electric conversion device and other components. These components can be referred to the description in the related art, and will not be described here.

[0083] Among them, please combine Figure 15 and please refer to Figure 16 , Figure 16 The second structure diagram of the electronic device 10 provided by the embodiment of the present application. The antenna radiator 110 can be formed on the middle frame 400 of the electronic device 10.

[0084] The middle frame 400, for example, the side frame 410 of the electronic device 10 can include a conductor structure, one or more slits 101 can be provided on the middle frame 400, for example, the side frame 410 to form a metal stub 102, and the antenna radiator 110 can include the metal stub 102. Wherein, the non-conductor material can be filled in the slit 101 to increase the structural strength of the side frame 410.

[0085] It can be understood that when the middle frame 400 is a rectangular structure, the antenna radiator 110 can be formed on the long side frame or the short side frame of the middle frame 400, and the embodiments of the present application do not limit this.

[0086] It can be understood that when the antenna radiator 110 is formed on the side frame 410 of the middle frame 400, the middle plate 420 of the middle frame 400 can be the ground system 150, at this time, the antenna radiator 110 can be electrically connected to the middle plate 420 through the ground spring, the ground pad, the ground screw and the like to realize grounding. Of course, the antenna radiator 110 can also be grounded by other means, and the embodiments of the present application do not limit this.

[0087] It should be noted that the antenna scheme of the present application is not only applicable to electronic devices such as mobile phones, but also applicable to electronic devices such as tablet circuits, PC computers, large screens, etc.; at the same time, the antenna implementation form of the present application is not limited to the metal side frame form, and the embodiments of the present application do not limit this.

[0088] The antenna device 100 of the embodiment of the present application sets the antenna radiator 110, the first feed source 120, the switching circuit 130, the second feed source 140 and the filter circuit 160, and the antenna device 100 can have the following advantages:

[0089] 1. The first feed source 120 excites the antenna radiator 110 to generate the first resonant mode and the fourth resonant mode and supports the first wireless signal and the fourth wireless signal, and the second feed source 140 can excite the antenna radiator 110 to generate the second resonant mode and the third resonant mode and support the second wireless signal and the fourth wireless signal. The antenna device 100 supports four kinds of wireless signals by using the same antenna radiator 110, and the antenna device 100 can realize miniaturization design and be suitable for various communication scenes.

[0090] 2. The first feed point 114 is arranged at a first current strong point area A1 formed by the second resonant mode on the antenna radiator 110, which can increase the isolation between the first wireless signal and the second wireless signal and improve the antenna performance of the antenna device 100.

[0091] 3、Under the switching action of the switching circuit 130, the first resonant mode excited by the first feed source 120 can support the transceiving of the first wireless signal of different frequency bands, the antenna device 100 can further support the transceiving of more frequency bands of wireless signals, the antenna device 100 can cover different frequency bands, and the application scenarios of the antenna device 100 are more extensive.

[0092] 4、When the first feed point 114 coincides with the electrical connection point 113, and the second feed source 140 is arranged close to the second end 112 of the ground, the antenna layout can be simplified by arranging one less feed point on the antenna radiator 110, and the isolation between the first feed source 120 and the second feed source 140 is better because the first feed point 114 and the second feed point 115 are far apart.

[0093] 5、The switching circuit 130 is electrically connected to the electrical connection point 113 of the antenna radiator 110, and the first current strong point area A1 generated on the antenna radiator 110 by the second resonant mode excited by the second feed source 140, when the switching circuit 130 performs the switching operation, the second wireless signal can not produce frequency offset, and the radiation performance of the second radiator can be guaranteed. And from the simulation results, it can be seen that the antenna device 100 of the present application can not only cover more frequency bands, but also has better antenna performance.

[0094] It should be understood that in the description of the present application, terms such as "first", "second" and the like are only used to distinguish similar objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features.

[0095] The above has introduced in detail the antenna device and the electronic equipment provided by the embodiment of the present application. In this paper, specific examples are applied to describe the principles and implementation modes of the present application, and the above embodiment is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the present application.

Claims

1. An antenna device, characterized by The antenna device comprises: an antenna radiator comprising a first end and a second end, and a first feeding point and a second feeding point located between the first end and the second end, the second end being grounded; a first feeding source electrically connected to the first feeding point, the first feeding source being configured to excite the antenna radiator to generate a first resonant mode and support the transmission and reception of a first wireless signal; a second feeding source electrically connected to the second feeding point, the second feeding source being configured to excite the antenna radiator to generate a second resonant mode and form at least one first current strong point region on the antenna radiator, the second resonant mode being configured to support the transmission and reception of a second wireless signal; wherein the first feeding point is located in one of the first current strong point regions to increase the isolation between the first wireless signal and the second wireless signal. The antenna radiator further comprises an electrical connection point located between the first end and the second end; the antenna device further comprises:

2. The antenna device of claim 1, wherein, a switching circuit, one end of the switching circuit being electrically connected to the electrical connection point, and the other end of the switching circuit being grounded; wherein the electrical connection point is located in one of the first current strong point regions, so that under the switching action of the switching circuit, the first resonant mode supports the transmission and reception of a first wireless signal of different frequency bands, and the second resonant mode supports the transmission and reception of the second wireless signal of the same frequency band. The first feeding point overlaps the electrical connection point; or when a plurality of first current strong point regions are formed on the antenna radiator, the first feeding point is located in one of the current strong point regions, and the electrical connection point is located in another of the current strong point regions.

3. The antenna device of claim 2, wherein, The second feeding source is further configured to excite the antenna radiator to generate a third resonant mode and support the transmission and reception of a third wireless signal.

4. The antenna device according to claim 2 or 3, characterized in that The third resonant mode is configured to form at least one second current strong point region on the antenna radiator; 5. The antenna device of claim 4, wherein, wherein the electrical connection point is located in a current strong point region that overlaps at least one of the first current strong point regions and at least one of the second current strong point regions. The third resonant mode forms two second current strong point regions, a second current zero point region and a third current zero point region on the antenna radiator, one of the second current strong point regions, the second current zero point region, another of the second current strong point regions and the third current zero point region being sequentially arranged between the first end and the second end; 6. The antenna device of claim 4, wherein, wherein the third resonant current generated by the third resonant mode flows in the direction from the second current zero point region to the first end, in the direction from the second current zero point region to the third current zero point region, and in the direction from the second end to the third current zero point region. The first feeding source is further configured to excite the antenna radiator to generate a fourth resonant mode and support the transmission and reception of a fourth wireless signal.

7. The antenna device according to claim 2 or 3, characterized in that The antenna device further comprises:

8. The antenna device of claim 7, wherein, ​ The filter circuit is electrically connected with the switching circuit, and is configured to allow a first resonant current formed by the first resonant mode to pass through the switching circuit and the filter circuit to return to the ground, and to block a fourth resonant current formed by the fourth resonant mode from passing through the switching circuit and the filter circuit to return to the ground.

9. The antenna device of claim 8, wherein, The filter circuit is further configured to block a resonant current formed by a resonant mode generated by the second feed source exciting the antenna radiator from passing through the switching circuit and the filter circuit to return to the ground.

10. The antenna device of claim 7, wherein, The fourth resonant current generated by the fourth resonant mode flows in a direction from the first end to the second end, and a current intensity of the fourth resonant current distributed between the first end and the first feed point is greater than a current intensity of the fourth resonant current distributed between the first feed point and the second end.

11. The antenna device of claim 7, wherein, The first wireless signal is a signal of an N78 frequency band, and / or the second wireless signal is a low-frequency signal, and / or the fourth wireless signal is a wireless fidelity signal of 2.4G.

12. The antenna device according to any one of claims 1 to 3, characterized in that A distance between the second feed point and the second end is less than a distance between the second feed point and the first feed point.

13. The antenna device according to any one of claims 1 to 3, characterized in that The first resonant current generated by the first resonant mode flows in a direction from the second end to the first end, and a current intensity of the first resonant current distributed between the second end and the first feed point is greater than a current intensity of the first resonant current distributed between the first feed point and the first end.

14. The antenna device according to any one of claims 1 to 3, characterized in that The second resonant mode forms a first current strong point region and a first current zero point region on the antenna radiator, and the first current zero point region is located between the first current strong point region and the second end. The second resonant current generated by the second resonant mode flows in a direction from the first end to the first current zero point region and in a direction from the second end to the first current zero point region.

15. An electronic device, comprising: An antenna device as claimed in any one of claims 1 to 14.

16. The electronic device of claim 15, wherein, The electronic device includes a middle frame, the middle frame forms a metal stub through a slit, and the antenna radiator includes the metal stub. The electronic device includes a middle frame, the middle frame forms a metal stub through a slit, and the antenna radiator includes the metal stub.

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