Antenna device and electronic equipment

Abstract

The invention provides an antenna device and electronic equipment. An antenna radiator of the antenna device comprises a first end, a first feeding point, a second feeding point and a grounded second end; the first feed source is electrically connected to the first feed point and is used for exciting the antenna radiator to generate a first resonant mode and supporting transceiving of a first wireless signal; the second feed source is electrically connected to the second feed point and is used for exciting the antenna radiator to generate a second resonant mode and forming at least one first current strong point area on the antenna radiator, and the second resonant mode is used for supporting transceiving of a second wireless signal; the first feeding point is arranged in a first current strong point area so as to increase the isolation degree between the first wireless signal and the second wireless signal. Therefore, the antenna device 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 field of communication technology, and in particular to an antenna device and an electronic device. Background Art

[0002] With the development of communication technology, electronic devices such as smart phones can realize more and more functions, and the communication modes of electronic devices are also more diverse. It is understandable that each communication mode requires a corresponding antenna to support it.

[0003] However, with the development of electronic technology, electronic devices are becoming increasingly miniaturized, lighter and thinner, and the internal space of electronic devices is also becoming smaller and smaller, so how to reasonably set the antenna of the electronic device has become a difficult problem. Summary of the invention

[0004] The present application provides an antenna device and an electronic device, which can realize a miniaturized design of the antenna device and ensure 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 located between the first end and the second end, wherein the second end is 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 feed 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 a region of the first current intensity point 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 electronic device of the present application, the first feed source of the antenna device is electrically connected to the first feed point of the antenna radiator and can excite the antenna radiator to generate the first resonance mode and support the first wireless signal, the second feed source can excite the antenna radiator to generate the second resonance mode and support the second wireless signal, the antenna device can support at least two wireless signals using the same antenna radiator, and the antenna device can achieve a miniaturized design. In addition, the first feed point can be set in a first current strong point area of ​​the second resonance mode. When the first feed source is electrically connected to the first feed point and excites the antenna radiator to generate the first resonance mode, the isolation between the first wireless signal supported by the first resonance mode and the second wireless signal supported by the second resonance 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] Furthermore, when the antenna device is also provided with a switching circuit, under the switching action of the switching circuit, the first resonance mode generated by the excitation of the first feed source can support the reception and transmission of the first wireless signal of different frequency bands, so that the antenna device of the present application can support the reception and transmission of wireless signals of more frequency bands, and the antenna device has a wider range of applicable scenarios. At the same time, when the electrical connection point where the switching circuit is electrically connected to the antenna radiator is a first current strong point area formed on the antenna radiator by the second resonance mode generated by the excitation of the second feed source, if the switching circuit performs a switching operation, it is difficult for the switching circuit to affect the electric field of the second resonance mode, and the second wireless signal is not easy to produce frequency deviation, which can ensure the radiation performance of the second radiator. Therefore, the antenna device of the present application can reuse the same antenna radiator to realize the reception and transmission of the first wireless signal and the second wireless signal, and can also ensure the radiation performance of the second wireless signal when the first wireless signal switches between different frequency bands. The entire antenna device can realize a miniaturized design and can also ensure the antenna performance of the first wireless signal and the second wireless signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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.

[0014] Figure 1 A first structural schematic diagram of an antenna device provided in an embodiment of the present application.

[0015] Figure 2 for Figure 1 A schematic diagram of current distribution in the second resonance mode of the antenna device is shown.

[0016] Figure 3 A second structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0017] Figure 4 for Figure 3 A schematic diagram of current flow in the second resonance mode of the antenna device is shown.

[0018] Figure 5 for Figure 3 A schematic diagram of current distribution in the first resonance mode of the antenna device is shown.

[0019] Figure 6 for Figure 3 A schematic diagram of current flow in the first resonance mode of the antenna device is shown.

[0020] Figure 7 for Figure 3 A schematic diagram of current flow in the third resonance mode of the antenna device is shown.

[0021] Figure 8 for Figure 3 A schematic diagram of current flow in the fourth resonance mode of the antenna device is shown.

[0022] Fig. 9 A third structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0023] Fig.10 for Fig. 9 An electrical connection schematic diagram of the antenna device shown.

[0024] Fig.11 A schematic diagram of the S-parameter and isolation curve of the antenna device provided in an embodiment of the present application.

[0025] Fig.12 It is a schematic diagram of S parameter and isolation curve when the switching circuit of the antenna device according to the embodiment of the present application performs a switching operation.

[0026] Fig.13 It is a structural schematic diagram of an antenna device in the related technology.

[0027] Fig.14 The antenna device of the present application and Fig.13 The figure shows a schematic diagram of antenna efficiency comparison curve of an antenna device in the related art.

[0028] Fig.15 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0029] Fig.16 A second structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the attached examples of the present application Figure 1 To Attachment Fig.16 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not 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.

[0031] The embodiment of the present application provides an antenna device 100 and an electronic device, and the antenna device 100 can realize a wireless communication function. For example, the antenna device 100 can transmit wireless fidelity (Wireless Fidelity, referred to as Wi-Fi) signals, global positioning system (Global Positioning System, referred to as GPS) signals, third-generation mobile communication technology (3rd-Generation, referred to as 3G), fourth-generation mobile communication technology (4th-Generation, referred to as 4G), fifth-generation mobile communication technology (5th-Generation, referred to as 5G), near field communication (Near field communication, referred to as NFC) signals, Bluetooth (Blue tooth, referred to as BT) signals, ultra-wideband communication (Ultra Wide Band, referred to as UWB) signals, etc.

[0032] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a first structure of the antenna device 100 provided in an embodiment of the present application. Figure 2 for Figure 1 A schematic diagram of current distribution of a second resonance mode of the antenna device 100 is shown. 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 feed point 114, and a second feed point 115. The first feed point 114 and the second feed point 115 can be arranged between the first end 111 and the second end 112. The second end 112 can be electrically connected to the ground system 150 to achieve grounding. The second end 112 can be the grounding end of the antenna radiator 110. Accordingly, the first end 111 can be the free end (also called the end, the open end, or the open end) of the antenna radiator 110. The first feed source 120 can be directly or indirectly electrically connected to the first feed point 114 to achieve 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 transceiving of a first wireless signal (transceiving includes receiving and transmitting, which will not be repeated below). The second feed source 140 can be directly or indirectly electrically connected to the second feed point 115 to achieve 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 area A1 on the antenna radiator 110. The second resonant mode is used to support the transmission and reception of the second wireless signal. Among them, the first feed point 114 of the antenna radiator 110 can be set in a first current strong point area 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 structure with zero electric potential. Among them, the ground system 150 can be formed by a conductor, a printed circuit or a metal printed layer in the antenna device 100 or the electronic device; or, the ground system 150 can be formed on the main board, small board or other supporting board of the antenna device 100 or the electronic device; or, the ground system 150 can also be formed on the frame of the antenna device 100 or the electronic device. The embodiment of the present application does not limit the specific setting position of the ground system 150.

[0035] It can be understood that the antenna radiator 110 is a conductor structure that can support the transmission and reception of wireless signals. The first feed source 120 and the second feed source 140 are signal sources of the antenna device 100. Under the excitation of the first feed source 120 and the second feed source 140, the antenna radiator 110 can at least transmit and receive the first wireless signal and the second wireless signal. Among them, the antenna radiator 110 can be, but not limited to, a metal branch radiator, a printed circuit board radiator, a flexible circuit board radiator, a silver paste spray radiator, etc.; the antenna radiator 110 can be, but not limited to, a straight strip type or a bent type, and the embodiment of the present application does not limit the formation method 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 feeding point 114 of the antenna radiator 110 of the present application can be set at a first current strong point area A1 formed on the antenna radiator 110 by the second resonant mode. The so-called current strong point area refers to the area where the current intensity formed by the resonant current generated by the resonant mode on the radiator is the largest; 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; wherein, on the current simulation diagram, the darkest one or several areas 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 feeding point 114 is set at a current strong point area formed on the antenna radiator 110 by the second resonant mode, the interference between the first feed source 120 and the second feed source 140 electrically connected to the first feeding point 114 is small, and the isolation between the two is good.

[0037] It is understandable that the first feeding point 114 and the second feeding point 115 of the antenna radiator 110 can be spaced apart to avoid mutual interference between the first excitation signal of the first feed source 120 and the second excitation signal of the second feed source 140. For example, the distance between the second feeding point 115 and the second end 112 can be smaller than the distance between the second feeding point 115 and the first feeding point 114. The second feeding point 115 can be arranged close to the grounded second end 112, and the distance between the second feeding point 115 and the first feeding point 114 can be far away, which can avoid mutual interference between the first feed source 120 and the second feed source 140, thereby further improving the isolation between the first wireless signal and the second wireless signal. Of course, the first feeding point 114 and the second feeding point 115 can also have other positional relationships, and the embodiment of the present application does not limit the specific setting positions of the two feeding points.

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

[0039] In the antenna device 100 of the embodiment of the present application, the first feed source 120 is electrically connected to the first feed point 114 of the antenna radiator 110 and can excite the antenna radiator 110 to generate a first resonance mode and support a first wireless signal. The second feed source 140 can excite the antenna radiator 110 to generate a second resonance 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 achieve a miniaturized design. In addition, the first feed point 114 is set in a first current strong point area A1 of the second resonance mode. When the first feed source 120 is electrically connected to the first feed point 114 and excites the antenna radiator 110 to generate a first resonance mode, the isolation between the first wireless signal supported by the first resonance mode and the second wireless signal supported by the second resonance 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 100 is better.

[0040] Please combine Figure 1 and Figure 2 Please also refer to Figure 3 , Figure 3 The second structural diagram of the antenna device 100 provided in the embodiment of the present application. The antenna device 100 may further 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 also 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. Among them, the electrical connection point 113 is set at a first current strong point area A1 formed on the antenna radiator 110 by the second resonant mode, so that under the switching action of the switching circuit 130, the first feed source 120 excites the antenna radiator 110 to generate a first resonant mode that supports the transmission and reception of first wireless signals of different frequency bands, and the second resonant mode supports the transmission and reception of second wireless signals 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 radiation structure. The electrical length of the radiator can be greater than, less than or equal to its branch length. The electrical length of the radiator can be associated with the frequency supported by the radiator. When the electrical length of the radiator is longer, the radiator can support wireless signals with lower frequencies; when the electrical length of the radiator is shorter, the radiator can support wireless signals with higher frequencies. The radiator can change its electrical length by electrically connecting circuits with different impedances. The switching circuit 130 may include, but is not limited to, multiple switching branches, and the switching circuit 130 can switch between multiple switching branches to adjust the frequency band of the first wireless signal. Among them, each switching branch may include, but is not limited to, one or more capacitors, inductors, switches and other components connected in series or in parallel. The specific structure of the switching circuit 130 is not limited in the embodiment of the present application.

[0043] It is understandable that when the switching circuit 130 switches between different switching branches, the antenna radiator 110 may 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 reception and transmission of first wireless signals of different frequency bands. Since the first antenna and the second antenna reuse the same antenna radiator 110 to support the reception and transmission of wireless signals, when the switching circuit 130 switches the frequency band of the first wireless signal supported by the first resonant mode excited by the first feed source 120, the switching circuit 130 will also affect the resonant mode excited by the second feed source 140, such as the second resonant mode, and the switching circuit 130 may cause the frequency band of the second wireless signal supported by the second resonant mode to produce a frequency deviation, thereby affecting the antenna performance of the second wireless signal.

[0044] In order to prevent the switching circuit 130 from switching the frequency band of the first wireless signal and affecting the frequency band of the second wireless signal, the embodiment of the present application sets the electrical connection point 113 at which the switching circuit 130 is electrically connected to the antenna radiator 110 in a first current strong point area A1 formed on the antenna radiator 110 in the second resonance mode. When the switching circuit 130 switches between different frequency bands of the first wireless signal, since the current strong point area is also an electric field weak point area, the switching operation of the switching circuit 130 is unlikely to affect the electric field of the second resonance mode, and thus the switching operation of the switching circuit 130 is unlikely to affect the second wireless signal supported by the second resonance mode, and the second wireless signal is unlikely to generate frequency deviation, thereby ensuring the radiation performance of the second wireless signal.

[0045] It can be understood that when the second resonance 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 electrical 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 resonance mode on the antenna radiator 110. Of course, if the second resonance 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 electrical connection point 113 can be located at another first current strong point area A1.

[0046] In the antenna device 100 of the embodiment of the present application, under the switching action of the switching circuit 130, the first resonant mode generated by the excitation of the first feed source 120 can support the transmission and reception of the first wireless signal of different frequency bands, so that the antenna device 100 of the present application can support the transmission and reception of wireless signals of more frequency bands, and the application scenarios of the antenna device 100 are wider. At the same time, the electrical connection point 113 where the switching circuit 130 is electrically connected to the antenna radiator 110 is the first current strong point area A1 generated on the antenna radiator 110 by the second resonant mode generated by the excitation of the second feed source 140. When the switching circuit 130 performs the switching operation, the switching circuit 130 is difficult to affect the electric field of the second resonant mode, and the second wireless signal is not easy to generate frequency deviation, which can ensure the radiation performance of the second radiator. Therefore, the antenna device 100 of the present application can reuse the same antenna radiator 110 to realize the transmission and reception of the first wireless signal and the second wireless signal, and can also 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 miniaturization design, but also ensure the antenna performance of the first wireless signal and the second wireless signal.

[0047] Please combine Figures 1 to 3 Please also refer to Figure 4 , Figure 4 for Figure 3A schematic diagram of current flow in the 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 may be a three-quarter resonant mode. The second feed source 140 may excite the antenna radiator 110 to support the transmission and reception of the second wireless signal in the three-quarter resonant mode. Figure 2 and Figure 4 As shown, the resonant current generated by the second resonant mode, for example, the second resonant current I2, can form a first current strong point area A1 and a first current zero point area B1 on the antenna radiator 110, and the first current zero point area B1 is located between the first current strong point area A1 and the second end 112. Since the second end 112 is grounded, the second end 112 can also be a current strong point area. Correspondingly, the first end 111 can be a current zero point area, and the first current strong point area A1 can be a current strong point area different from the second end 112 generated by the second resonant mode. The so-called current zero point area refers to the area where the current intensity of the resonant current on the radiator is the weakest. Since the resonant current is a periodic excitation current, the resonant current can form one or more current zero point areas on the radiator. On the current simulation diagram, the area with the lightest current distribution color is the current zero point area. As shown Figure 2 and Figure 4 As shown, the second resonant current I2 generated by the second resonant mode can flow from the first end 111 to the first current zero point region B1, and flow 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 a second resonant mode of the three-quarter resonant mode. Among them, the first feeding point 114 can be set in the first current strong point region A1 to improve the isolation between the first wireless signal and the second wireless signal; the electrical connection point 113 where the switching circuit 130 is electrically connected to the antenna radiator 110 can also be set in 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 produce 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 produce a quarter-five resonant mode, a half resonant mode, etc. The embodiment of the present application does not limit the specific method of the second resonant mode. Any resonant mode scheme that can form at least one first current strong point area A1 on the antenna radiator 110 is within the protection scope of the embodiment of the present application.

[0049] Please combine Figures 1 to 3 Please also refer to Figure 5 and Figure 6 , Figure 5 for Figure 3 A schematic diagram of current distribution in the first resonance mode of the antenna device 100 is shown. Figure 6 for Figure 3 The first resonant mode generated by the first feed source 120 exciting the antenna radiator 110 may be a quarter resonant mode, and the first feed source 120 may excite the antenna radiator 110 to support the transmission and reception of the first wireless signal in the quarter resonant mode.

[0050] like Figure 5 and Figure 6 As shown, the resonant current generated by the first resonant mode, for example, the first resonant current I1, may flow on the antenna radiator 110 in the direction from the second end 112 to the first end 111, the second end 112 may be the current strong point area of ​​the first resonant current I1, and the first end 111 may be the current zero point area of ​​the first resonant current I1. Figure 6 As shown, the current intensity of the first resonant current I1 distributed between the second end 112 and the first feeding point 114 may be greater than the current intensity of the first resonant current I1 distributed between the first feeding point 114 and the first end 111, so that the first resonant current I1 may be mainly distributed between the second end 112 and the first feeding point 114.

[0051] It can be understood 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 respectively support the first wireless signal and the second wireless signal in different resonance modes under the excitation of the two feed sources, which can reduce the interference between the two signals; and the second feed source 140 supports the second wireless signal in a three-quarter resonance mode, and the first current strong point area A1 generated by the three-quarter resonance mode can be closer to the first end 111 and 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 (that is, the first feeding 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 feeding point 114 and the second feeding point 115 is farther, 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 a first resonance mode of other resonance modes. For example, but not limited to, the first feed source 120 can excite the antenna radiator 110 to generate a one-half resonance mode and a four-fifths resonance mode. The specific method of the first resonance mode is not limited in the embodiment of the present application.

[0053] The second feed source 140 can also excite the antenna radiator 110 to generate a third resonance mode and support the transmission and reception of a third wireless signal. Figures 1 to 3 Please also refer to Figure 7 , Figure 7 for Figure 3 A schematic diagram of current flow of the third resonant mode of the antenna device 100 is shown. 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 is understandable that the third wireless signal may be, but is not limited to, a cellular signal, a Wi-Fi signal, a Bluetooth signal, an NFC signal, or a UWB signal. For example, the third wireless signal may be a 5G Wi-Fi signal. The third wireless signal is not specifically limited in the present embodiment of the application.

[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 electrical connection point 113 at which the switching circuit 130 is electrically connected to the antenna radiator 110 can be set at a current strong point area where at least one first current strong point area A1 overlaps with at least one second current strong point area A2 (the overlapping current strong point area is not the second end 112), that is, the switching 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 this time, when the switching circuit 130 switches between different switching branches so that the first resonant mode supports the first wireless signal of different frequency bands, the switching operation of the switching circuit 130 will neither affect the second wireless signal nor the third wireless signal, and the second wireless signal and the third wireless signal are not prone to 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 resonance mode generated by the second feed source 140 exciting the antenna radiator 110 can be a quarter-fifth resonance 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 quarter-fifth resonance mode. Figure 7As shown, the third resonance mode can form two current zero point areas, such as the second current zero point area B2 and the third current zero point area B3, and two second current strong point areas A2, such as the second current strong point area A2a and the second current strong point area A2b, on the antenna radiator 110. One second current strong point area A2a, the second current zero point area B2, another second current strong point area A2b and the third current zero point area B3 can be arranged in sequence between the first end 111 and the second end 112. At this time, the second end 112 is the current strong point area, and the first end 111 can be the current zero point area. The third resonance current I3 generated by the third resonance mode can flow in the direction from the second current zero point area B2 to the first end 111, and flow in the direction from the second current zero point area B2 to the third current zero point area B3, and flow in the direction from the second end 112 to the third current zero point area 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-quarters resonance mode and to support the third wireless signal in the five-quarters resonance mode, the strong points of the resonant current in the three-quarters resonance mode and the five-quarters resonance mode are more likely to coincide with each other, and it is easier to find a suitable area on the antenna radiator 110 to set the electrical connection point 113, 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 is understandable that the second feed source 140 can also excite the antenna radiator 110 to generate a third resonance mode of other resonance modes, for example but not limited to the third resonance mode can also be a half resonance mode. The specific manner of the third resonance mode is not limited in the embodiment of the present application.

[0059] In the antenna device 100 of the embodiment 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-quarters resonance mode and the four-fifths resonance mode. The resonance modes of the two wireless signals are different, which can reduce interference between the two wireless signals. At the same time, the electrical connection point 113 of the switching circuit 130 is arranged in a current strong point area common to the three-quarters resonance mode and the four-fifths resonance mode. The switching circuit 130 is not easy to interfere with the second wireless signal and the third wireless signal, which can further ensure the antenna performance of the two wireless signals.

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

[0061] Understandably, please combine Figures 1 to 3 Please also refer to Figure 8 , Figure 8 for Figure 3 A schematic diagram of current flow of the fourth resonant mode of the antenna device 100 shown. The fourth resonant mode generated by the first feed source 120 exciting the antenna radiator 110 may be a monopole resonant mode. The first feed source 120 may excite the antenna radiator 110 to support the transmission and reception of 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 may 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 feeding point 114 is greater than the current intensity of the fourth resonant current I4 distributed between the first feeding 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 feeding point 114, and the fourth resonant current I4 may be mainly distributed between the first end 111 and the first feeding point 114.

[0062] It can be understood that the fourth resonance mode of the monopole resonance mode is different from the first resonance mode of the quarter resonance mode, and the fourth resonance current I4 of the fourth resonance mode has a larger current intensity between the first end 111 and the first feeding point 114, while the first resonance current I1 of the first resonance mode has a larger current intensity between the second end 112 and the first feeding point 114, so that the areas with larger current intensities of the first resonance current I1 and the fourth resonance current I4 are separated from each other, and the first resonance mode and the fourth resonance 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 resonance mode to support the fourth wireless signal in other resonance modes such as but not limited to the half resonance mode and the three-quarter resonance mode. The present application does not limit the specific resonance mode of the fourth resonance mode.

[0064] In order to further reduce the influence of the switching circuit 130 on the fourth wireless signal, please refer to Fig. 9 , Fig. 9 This is a third structural diagram of the antenna device 100 provided in an embodiment of the present application. The antenna device 100 may further include a filter circuit 160 .

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

[0066] It is understood that the filter circuit 160 may include, but is not limited to, components such as capacitors and inductors. Fig.10 , Fig.10 for Fig. 9 An electrical connection diagram of the antenna device 100 is shown. The filter circuit 160 may include a first inductor element 161 and a first capacitor element 162, which may be connected in parallel to each other, and one end of the first inductor element 161 and the first capacitor element 162 after being connected in parallel may be electrically connected to the antenna radiator 110, such as the electrical connection point 113 of the antenna radiator 110, and the other end of the first inductor element 161 and the first capacitor element 162 after being connected in parallel may be electrically connected to one end of the switching circuit 130. The switching circuit 130 may include a switching switch 131, a second inductance element 132, a second capacitance element 133, and a third inductance element 134. One end of the second inductance element 132, one end of the second capacitance element 133, and one end of the third inductance element 134 are all electrically connected to the other end of the first inductance element 161 and the first capacitance element 162 connected in parallel. The other end of the second inductance element 132, the other end of the second capacitance element 133, and the other end of the third inductance element 134 are all electrically connected to one end of the switching switch 131, and one end of the switching switch 131 is grounded. The switching switch 131 can choose to be grounded at the second inductance element 132, the second capacitance element 133, or the third inductance element 134, so that the antenna radiator 110 can support first wireless signals of different frequency bands.

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

[0068] It can be understood that the filter circuit 160 is used to allow the first resonant current I1 formed by the first resonant mode to return to the ground through the switching circuit 130 and the filter circuit 160, and to block the fourth resonant current I4 formed by the fourth resonant mode from returning to the ground through the switching circuit 130 and the filter circuit 160. 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 return to the ground through the filter circuit 160 and the switching circuit 130, and the first resonant mode can make the antenna radiator 110 have different equivalent electrical lengths under the influence of the switching circuit 130, so that the first resonant mode can support first wireless signals of different frequency bands. At the same time, the fourth resonant current I4 generated by the fourth resonant mode is not easy to return to the ground through the filter circuit 160 and the switching circuit 130, 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 deviation.

[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 returning to the ground through the switching circuit 130 and the filter circuit 160. For example, the filter circuit 160 can also block the second resonant current I2 and the third resonant current I3 from returning to the ground through the switching circuit 130 and the filter circuit 160, so that the switching operation of the switching circuit 130 is not likely to affect the second wireless signal supported by the second resonant mode, nor is it likely 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 deviation.

[0070] For example, please refer to Fig.11 , Fig.11 A schematic diagram of an S parameter and isolation curve of the antenna device 100 provided in an embodiment of the present application. Fig.11 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 it is working, curve S2 is the S parameter curve of the second antenna formed by the second feed source 140 and the antenna radiator 110 when it is working, and curve S3 is the isolation curve between the first antenna and the second antenna when they are working simultaneously. It can be seen from curve S1 that 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. It can be seen from curve S2 that 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. It can be seen from curve S3 that the isolation between the first antenna and the second antenna is also relatively good. Thus, Fig.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 combine Fig.11 Please also refer to Fig.12 , Fig.12 Schematic diagram of S parameter and isolation curve when the switching circuit 130 of the antenna device 100 according to the embodiment of the present application performs a switching operation. Fig.12 The curves S4 to S6 are S parameter curves of the antenna device 100 when the switching circuit 130 switches between the three switching branches. It can be seen from each curve from S4 to S6 that the antenna device 100 can simultaneously generate four resonant modes and support four wireless signals under the action of the first feed source 120 and the second feed source 140; wherein, Fig.12 It can be seen from the M1 region in FIG. 1 that when the switching circuit 130 performs a switching operation, the first resonance mode can excite the antenna radiator 110 to support a first wireless signal of a different frequency band; Fig.12 It can be seen from the M2 region in FIG. 1 that when the switching circuit 130 performs the switching operation, the frequency band of the fourth wireless signal supported by the fourth resonance mode excitation antenna radiator 110 changes only slightly; Fig.12 It can be seen from the M3 region and M4 that when the switching circuit 130 performs the switching operation, the second wireless signal supported by the second resonance mode excitation antenna radiator 110 and the third wireless signal supported by the third resonance mode excitation antenna radiator 110 have no frequency deviation at all. Fig.12 It can be seen that the switching circuit 130 of the present application basically has no influence on the second wireless signal to the fourth wireless signal.

[0072] In addition, the present application uses two feed sources to excite the antenna radiator 110 to support the transmission and reception of the second wireless signal and the first wireless signal. Compared with the scheme in which one feed source is used to excite the antenna radiator 110 to support the first wireless signal and the second wireless signal in the related scheme, the radiation efficiency of the antenna device 100 of the present application is much higher than the radiation efficiency of the antenna device 100 in the related art. For example, please refer to Fig.13 and Fig.14 , Fig.13 is a structural schematic diagram of an antenna device 200 in the related art, Fig.14 The antenna device 100 of the present application and Fig.13 FIG. 1 is a schematic diagram of a comparison curve of antenna efficiency of an antenna device 200 in the related art.

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

[0074] Based on the structure of the antenna device 100, please refer to Fig.15 , Fig.15 The first structural diagram of the electronic device 10 provided in the embodiment of the present application. The electronic device 10 includes the antenna device 100 of any of the above embodiments. Fig.15 As shown, the electronic device 10 may further include a display screen 300 , a middle frame 400 , a circuit board 500 , a battery 600 and a rear cover 700 .

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

[0076] The middle frame 400 may include a frame 410 and a middle plate 420. The frame 410 may be a hollow frame structure and form the outer frame of the electronic device 10. The middle plate 420 may be a thin plate or sheet-like structure. The middle frame 400 is used to provide support for the electronic devices or functional components in the electronic device 10 so as to install the electronic devices and functional components of the electronic device 10 together. For example, structures such as grooves, protrusions, and through holes may be provided on the middle frame 400 to facilitate the installation of electronic devices or functional components of the electronic device 10. It is understandable 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 for fixing, and the circuit board 500 is sealed inside the electronic device 10 by the rear shell 700. A processor may be integrated on the circuit board 500, and one or more functional components such as an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated. At the same time, the display screen 300 may be electrically connected to the circuit board 500 so that the display of the display screen 300 is controlled by the processor on the circuit board 500.

[0078] The battery 600 is disposed on the middle frame 400, and the battery 600 is sealed inside the electronic device 10 through the rear shell 700. At the same time, the battery 600 is electrically connected to the circuit board 500 so that the battery 600 can power the electronic device 10. Among them, a power management circuit can be disposed on the circuit board 500. The power management circuit is used to distribute the voltage provided by the battery 600 to various electronic devices in the electronic device 10.

[0079] The rear shell 700 is connected to the middle frame 400. For example, the rear shell 700 can be attached to the middle frame 400 by an adhesive such as a double-sided adhesive to achieve 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 inside the electronic device 10 together with the middle frame 400 and the display screen 300 to protect 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 area with zero electric potential can be set on the rear shell 700, the circuit board 500 or the middle plate 420, and the ground system 150 can be set on the conductor area.

[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 filtering circuit 160 of the embodiment of the present application can be, but is not limited to, arranged on the circuit board 500; of course, one or more of the above-mentioned components can also be arranged on the small board of the electronic device 10, and the embodiment of the present application does not limit the specific setting position of the above-mentioned structure.

[0082] It can be understood that the above is only an illustrative example of the electronic device 10. The electronic device 10 of the embodiment of the present application may also include components such as a camera, a sensor, and an acoustic-to-electric conversion device. These components can be found in the description of the relevant technology and will not be repeated here.

[0083] Please combine Fig.15 Please also refer to Fig.16 , Fig.16 The second structural diagram of the electronic device 10 provided in the embodiment of the present application is as follows: The antenna radiator 110 may be formed on the middle frame 400 of the electronic device 10 .

[0084] The middle frame 400 of the electronic device 10, such as the frame 410, may include a conductor structure, and one or more gaps 101 may be provided on the middle frame 400, such as the frame 410, to form metal branches 102, and the antenna radiator 110 may include the metal branches 102. Among them, the gaps 101 may be filled with non-conductor materials to increase the structural strength of the frame 410.

[0085] It is understandable that when the middle frame 400 is a rectangular structure, the antenna radiator 110 can be formed on the long frame or the short frame of the middle frame 400, which is not limited in the embodiment of the present application.

[0086] It is understandable that when the antenna radiator 110 is formed on the frame 410 of the middle frame 400, the middle plate 420 of the middle frame 400 may be the ground system 150. At this time, the antenna radiator 110 may be electrically connected to the middle plate 420 through structures such as grounding springs, grounding pads, and grounding screws to achieve grounding. Of course, the antenna radiator 110 may also be grounded in other ways, which is not limited in the embodiments of the present application.

[0087] It should be noted that the antenna solution of the present application is not only applicable to electronic devices such as mobile phones, but can also be applied to electronic devices such as tablet circuits, PCs, large screens, etc.; at the same time, the antenna implementation form of the present application is not limited to the metal 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 is provided with an antenna radiator 110, a first feed source 120, a switching circuit 130, a second feed source 140 and a filter circuit 160. The antenna device 100 may 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 support the first wireless signal and the fourth wireless signal. 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 uses the same antenna radiator 110 to support four wireless signals. The antenna device 100 can achieve a miniaturized design and can be applicable to a variety of communication scenarios.

[0090] 2. The first feeding point 114 is arranged in a first current strong point area A1 formed on the antenna radiator 110 in the second resonance mode, 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 generated by the excitation of the first feed source 120 can support the reception and transmission of first wireless signals in different frequency bands. The antenna device 100 can further support the reception and transmission of wireless signals in more frequency bands. The antenna device 100 can cover different frequency bands, and the antenna device 100 has a wider range of applicable scenarios.

[0092] 4. When the first feeding point 114 and the electrical connection point 113 coincide with each other, and the second feed source 140 is arranged close to the grounded second end 112, one less feeding point can be arranged on the antenna radiator 110, simplifying the antenna layout, and the first feeding point 114 and the second feeding point 115 can be spaced farther apart, thereby improving the isolation between the first feed source 120 and the second feed source 140.

[0093] 5. The electrical connection point 113 where the switching circuit 130 is electrically connected to the antenna radiator 110 is the first current strong point region 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 may not generate frequency deviation, and the radiation performance of the second radiator may be guaranteed. In addition, it can be seen from the simulation results that the antenna device 100 of the present application can not only cover more frequency bands, but also have better antenna performance.

[0094] It should be understood that, in the description of this application, terms such as "first", "second", etc. 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.

[0095] The antenna device and electronic device 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 idea of ​​the present application, there will be changes in the specific implementation methods and application scope. 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: 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, wherein the second end is grounded; 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 resonance mode and support the transmission and reception of a first wireless signal; and a second feed source, electrically connected to the second feed 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; The first feeding point is arranged in a region of the first current intensity point to increase the isolation between the first wireless signal and the second wireless signal.

2. The antenna device according to claim 1, characterized in that The antenna radiator further includes an electrical connection point between the first end and the second end; the antenna device further includes: A switching circuit, one end of which is electrically connected to the electrical connection point, and the other end of which is grounded; wherein, The electrical connection point is arranged in a region of the first current strong point, so that under the switching action of the switching circuit, the first resonance mode supports the transmission and reception of the first wireless signal of different frequency bands, and the second resonance mode supports the transmission and reception of the second wireless signal of the same frequency band.

3. The antenna device according to claim 2, characterized in that The first feeding point overlaps with the electrical connection point; or, when a plurality of the first current strong point regions are formed on the antenna radiator, the first feeding point is arranged at one of the current strong point regions, and the electrical connection point is arranged at another of the current strong point regions.

4. The antenna device according to claim 2 or 3, characterized in that: The second feed source is also used to excite the antenna radiator to generate a third resonance mode and support the transmission and reception of a third wireless signal.

5. The antenna device according to claim 4, characterized in that: The third resonance mode is used to form at least one second current strong point area on the antenna radiator; Wherein, the electrical connection point is arranged in a current intensity point region where at least one of the first current intensity point regions overlaps with at least one of the second current intensity point regions.

6. The antenna device according to claim 4, characterized in that: The third resonance 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, and one second current strong point region, the second current zero point region, another second current strong point region and the third current zero point region are sequentially arranged between the first end and the second end; Among them, the third resonant current generated by the third resonant mode flows along the direction from the second current zero point region to the first end, flows along the direction from the second current zero point region to the third current zero point region, and flows along the direction from the second end to the third current zero point region.

7. The antenna device according to claim 2 or 3, characterized in that: The first feed source is also used to excite the antenna radiator to generate a fourth resonance mode and support the transmission and reception of a fourth wireless signal.

8. The antenna device according to claim 7, characterized in that: The antenna device further comprises: A filter circuit is electrically connected to the switching circuit, and the filter circuit is used to allow the first resonant current formed by the first resonant mode to return to the ground through the switching circuit and the filter circuit, and to block the fourth resonant current formed by the fourth resonant mode from returning to the ground through the switching circuit and the filter circuit.

9. The antenna device according to claim 8, characterized in that: The filter circuit is also used to block the resonant current formed by the resonant mode generated by the second feed source exciting the antenna radiator from returning to the ground through the switching circuit and the filter circuit.

10. The antenna device according to claim 7, characterized in that: 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 feeding point is greater than a current intensity of the fourth resonant current distributed between the first feeding point and the second end.

11. The antenna device according to claim 7, characterized in that: The first wireless signal is a signal of the N78 frequency band, and / or the second wireless signal is a low-frequency signal, and / or the fourth wireless signal is a 2.4G wireless fidelity signal.

12. The antenna device according to any one of claims 1 to 3, characterized in that: A distance between the second feeding point and the second end is smaller than a distance between the second feeding point and the first feeding 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 feeding point is greater than a current intensity of the first resonant current distributed between the first feeding point and the first end.

14. The antenna device according to any one of claims 1 to 3, characterized in that: The second resonance 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 region, and flows in a direction from the second end to the first current zero region.

15. An electronic device, characterized in that: Comprising the antenna device according to any one of claims 1 to 14.

16. The electronic device according to claim 15, characterized in that: The electronic device comprises a middle frame, the middle frame is formed with metal branches by slits, and the antenna radiator comprises the metal branches.

Images