Antenna assembly and electronic equipment

Abstract

The embodiment of the invention relates to an antenna assembly and electronic equipment, and the antenna assembly comprises a first radiation branch knot which is provided with a first feed end, and is used for generating a first current under the excitation of a first feed signal inputted by the first feed end; the second radiation branch knot and the first radiation branch knot are arranged at an interval, and one end, close to the first feed end, of the second radiation branch knot is coupled with the first feed end, so that the second radiation branch knot generates a second current under the excitation of the first feed signal; one end of the first filter circuit is connected with one end, close to the first feed end, of the second radiation branch knot, the other end of the first filter circuit is grounded, and the first filter circuit is used for allowing a second current of a first frequency band to pass through. Therefore, the second radiation branch knot and the first radiation branch knot share radiation supporting a radio frequency signal of a first frequency band.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of radio frequency technology, and in particular, to an antenna assembly and an electronic device. Background Art

[0002] With the continuous development of technology, people have higher and higher requirements for electronic devices. For example, as the resolution and frame rate of videos continue to increase, video files are also getting larger and larger. Electronic devices need to have a faster communication rate to avoid freezing when browsing videos. However, the communication capabilities of electronic devices in the prior art can no longer meet the needs of users. Summary of the invention

[0003] Based on this, it is necessary to provide an antenna assembly and an electronic device to address the above technical issues.

[0004] In a first aspect, the present application provides an antenna assembly, comprising:

[0005] A first radiation branch node has a first feeding end, and the first radiation branch node is used to generate a first current under the stimulation of a first feeding signal inputted from the first feeding end;

[0006] a second radiation branch, which is spaced apart from the first radiation branch, and an end of the second radiation branch close to the first feeding end is coupled to the first feeding end, so that the second radiation branch generates a second current under the stimulation of the first feeding signal;

[0007] A first filter circuit, one end of which is connected to one end of the second radiation branch close to the first feeding end, and the other end of the first filter circuit is grounded, and the first filter circuit is used to allow a second current of a first frequency band to pass through so that the second radiation branch and the first radiation branch share the radiation of a radio frequency signal supporting the first frequency band.

[0008] In a second aspect, the present application provides an electronic device, comprising the antenna assembly as described above.

[0009] The above antenna assembly and electronic device can form a current path corresponding to the first frequency band on the surface of the first radiation branch based on the first feed signal input to the first feed end of the first radiation branch. Moreover, through the second radiation branch coupled to the first feed end of the first radiation branch, and the first filter circuit connected to the end of the second radiation branch, another current path corresponding to the first frequency band can be formed on the surface of the second radiation branch. Therefore, the first feed signal can excite the two radiation branches to synchronously generate the first current and the second current, so that the second radiation branch and the first radiation branch share the radiation of the radio frequency signal supporting the first frequency band, thereby effectively improving the radiation performance of the antenna assembly in the first frequency band, and then improving the communication capability of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 is a structural schematic diagram of an antenna assembly according to an embodiment;

[0012] Figure 2 is a schematic diagram of current distribution of an antenna assembly according to an embodiment;

[0013] Figure 3 is a Smith chart of the antenna assembly when the second radiation branch is not provided;

[0014] Figure 4 One of the Smith charts of an antenna assembly provided with a second radiation branch and a second filtering circuit according to an embodiment;

[0015] Figure 5 is an S11 curve diagram of an antenna assembly according to an embodiment;

[0016] Figure 6 is a schematic diagram of a first filtering circuit and a second radiation branch according to an embodiment;

[0017] Figure 7 A second Smith chart of an antenna assembly provided with a second radiation branch and a second filtering circuit according to an embodiment;

[0018] Figure 8 A third Smith chart of an antenna assembly provided with a second radiation branch and a second filtering circuit according to an embodiment;

[0019] Fig. 9 is a schematic diagram of a second filtering circuit and a first radiation branch of an embodiment;

[0020] Fig.10 A partial rear view of an electronic device according to an embodiment;

[0021] Fig.11 The figure is a diagram showing the internal structure of an electronic device according to an embodiment.

[0022] Component number description:

[0023] The first radiation branch: 100; the second filtering circuit: 110; the second radiation branch: 200; the first filtering circuit: 210; the third radiation branch: 300; the top frame: 11; the first side frame: 12; the second side frame: 13. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first current may be referred to as a second current, and similarly, a second current may be referred to as a first current without departing from the scope of this application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. "Multiple" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined. "Several" means at least one, such as one, two, etc., unless otherwise clearly and specifically defined.

[0027] The embodiment of the present application provides an antenna assembly that can be applied to an electronic device. The electronic device also includes a middle frame, a display screen and a shell. The middle frame includes a frame body and a frame, and the frame is arranged around the periphery of the frame body. The display screen and the shell are respectively arranged on the opposite sides of the frame body of the middle frame. In the following description, the schematic diagram in the direction from the display screen toward the shell is the front view, and the front view can also be referred to as a schematic diagram of looking down on the display screen. The schematic diagram in the direction from the shell toward the screen is the rear view, and the rear view is also referred to as a schematic diagram of looking down on the shell. It can be understood that the introduction of the above electronic device is only an introduction to an application environment of the antenna assembly, and other components other than the antenna assembly in the electronic device should not be understood as a limitation of the antenna assembly provided in the embodiment of the present application.

[0028] The electronic device to which the antenna assembly of this embodiment can be applied can be a terminal. The terminal can be, but is not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car-mounted devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc.

[0029] The present application embodiment provides an antenna assembly, Figure 1 is a schematic diagram of the structure of an antenna assembly according to an embodiment, referring to Figure 1 The antenna assembly includes a first radiation branch 100, a second radiation branch 200 and a first filtering circuit (not shown).

[0030] The first radiating branch 100 has a first feeding terminal F1, and the first radiating branch 100 is used to generate a first current under the excitation of a first feeding signal input to the first feeding terminal F1 to support the radiation of a radio frequency signal in a first frequency band. Specifically, during the radiation of the radio frequency signal in the first frequency band, the radio frequency chip is used to convert the baseband signal into a high-frequency current signal suitable for wireless transmission. The feed source is used to convert the high-frequency current signal processed by the radio frequency chip into a first feeding signal, and transmit it to the first radiating branch 100 through a feeder. The first radiating branch 100 can emit an electromagnetic wave signal into space according to the first feeding signal, thereby realizing the radiation of the radio frequency signal in the first frequency band.

[0031] Among them, the first radiation branch 100 can also be called the first radiator or the first excitation branch. The first radiation branch 100 can be any one of a laser direct structuring (LDS) radiation branch, a flexible printed circuit (FPC) radiation branch, a print direct structuring (PDS) radiation branch and a metal branch radiation branch. When the antenna assembly is applied to an electronic device, the first radiation branch 100 can be a structural antenna (Mechanical Design Antenna, MDA) radiation branch designed using the metal embedding of the electronic device itself. For example, the first radiation branch 100 can be an antenna radiation branch designed using the middle frame formed by the plastic and metal of the electronic device. In addition, the first radiation branch 100 can also be a metal frame radiation branch designed using a metal middle frame.

[0032] It is understandable that the present application does not specifically limit the shape, structure and material of the first radiating branch 100, and the shapes of the first radiating branch 100 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the first radiating branch 100 is in a strip shape, the present application does not limit the extension trajectory of the first radiating branch 100, so the first radiating branch 100 can extend in a straight line, a curve, a multi-stage bend, etc. trajectory. The above-mentioned first radiating branch 100 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with varying widths such as a gradient width and a widened area. In the schematic diagram of the present embodiment, the first radiating branch 100 extends along a straight line trajectory. It is understandable that the first radiating branch 100 shown in the schematic diagram of the present embodiment should not be understood as a limitation on the main radiation provided in the embodiment of the present application.

[0033] The second radiation branch 200 is spaced apart from the first radiation branch 100, and one end of the second radiation branch 200 close to the first feeding terminal F1 is coupled to the first feeding terminal F1, so that the second radiation branch 200 generates a second current under the stimulation of the first feeding signal. Figure 1 The end of the second radiating branch node 200 close to the first feeding terminal F1 is shown as the second feeding terminal F2 of the second radiating branch node 200, but in other embodiments, the end of the second radiating branch node 200 close to the first feeding terminal F1 can also be the grounding terminal of the second radiating branch node 200, or the free end of the second radiating branch node 200, which is not limited in this embodiment. Accordingly, the second radiating branch node 200 can adopt any structure of a monopole antenna, an L-shaped antenna, an inverted F antenna, etc., and this embodiment does not limit the specific structure of the second radiating branch node 200 and the frequency band of the supported RF signal.

[0034] The second radiation branch 200 may also be referred to as a second radiator or a second excitation branch. The second radiation branch 200 may be any one of a laser direct structuring (LDS) radiation branch, a flexible printed circuit (FPC) radiation branch, a print direct structuring (PDS) radiation branch, and a metal branch radiation branch. When the antenna assembly is applied to an electronic device, the second radiation branch 200 may be a mechanical design antenna (MDA) radiation branch designed using the metal insert of the electronic device itself. For example, the second radiation branch 200 may be an antenna radiation branch designed using a middle frame formed of plastic and metal of the electronic device. In addition, the second radiation branch 200 may also be a metal frame radiation branch designed using a metal middle frame.

[0035] It is understandable that the present application does not make specific restrictions on the shape, structure and material of the second radiation branch 200, and the shapes of the second radiation branch 200 include but are not limited to bent, straight, L-shaped, sheet-shaped, rod-shaped, coated, thin film, etc. When the second radiation branch 200 is in a strip shape, the present application does not limit the extension trajectory of the second radiation branch 200, so the second radiation branch 200 can be extended in a straight line, a curve, a multi-stage bend, etc. The above-mentioned second radiation branch 200 can be a line with uniform width on the extension trajectory, or it can be an irregular shape with varying widths such as a gradual width and a widened area. In the schematic diagram of this embodiment, the second radiation branch 200 extends along a straight line trajectory. It is understandable that the second radiation branch 200 shown in the schematic diagram of this embodiment should not be understood as a limitation on the main radiation provided in the embodiment of the present application.

[0036] It should be noted that the extension direction, shape, structure and material of the second radiating branch 200 and the first radiating branch 100 can be the same or different. As long as the second radiating branch 200 can be coupled with the first feeding end F1 of the first radiating branch 100 and generate a corresponding second current, it falls within the protection scope of this embodiment.

[0037] One end of the first filter circuit is connected to one end of the second radiation branch 200 close to the first feed terminal F1, and the other end of the first filter circuit is grounded. Specifically, the first filter circuit can be connected to the floor to achieve grounding of the first filter circuit. When the antenna assembly is used in an electronic device, the floor can be but is not limited to the frame body of the middle frame in the electronic device, or the ground in the circuit board, or the shielding part of the display screen, or the conductive battery cover, etc. In other embodiments, the floor can also be a separate ground independent of the frame body of the electronic device, the ground of the circuit board, the shielding part of the display screen, and the conductive battery cover. This application does not limit the floor.

[0038] The first filter circuit is used to allow the second current of the first frequency band to pass through, that is, when the second current coupled on the second radiation branch 200 is in the first frequency band, the first filter circuit can be understood as a short-circuit state, so that the second current is transmitted to the ground. Therefore, in addition to the first radiation branch 100, this embodiment can also form another current path of the first frequency band on the surface of the second radiation branch 200 through the first filter circuit set at an appropriate position, so that the second radiation branch 200 and the first radiation branch 100 share the radiation of the radio frequency signal supporting the first frequency band. Optionally, the first frequency band is any one of a WIFI communication frequency band, a Bluetooth communication frequency band, a cellular communication frequency band, a satellite communication frequency band, etc. The WIFI communication frequency band includes any one of a WIFI 2.4G frequency band and a WIFI 5G frequency band, and the cellular communication frequency band includes any one of a low frequency band, a medium frequency band, and a high frequency band.

[0039] In an exemplary manner, the first current and the second current can be used to jointly support the same or approximately the same sub-band in the first frequency band. Approximately the same means that the difference between the center frequency of the sub-band supported by the first current and the center frequency of the sub-band supported by the second current is less than a threshold value, for example, the difference is less than 0.02 GHz. By supporting the transmission and reception of radio frequency signals of the same or approximately the same sub-band by the first current and the second current, not only can spectrum resources be saved, but also the electromagnetic wave signals corresponding to the two currents can be superimposed on each other by adjusting the phase of the signal, thereby achieving signal enhancement in a specific direction. In another exemplary manner, the first current and the second current can also be used to jointly support different sub-bands in the first frequency band. Different means that the difference between the center frequency of the sub-band supported by the first current and the center frequency of the sub-band supported by the second current is greater than a threshold value, for example, the difference is greater than 0.5 GHz. By supporting the transmission and reception of radio frequency signals of different sub-bands by the first current and the second current, not only can the interference between electromagnetic wave signals of different sub-bands be reduced, but also the entire frequency band can be fully utilized, thereby improving spectrum utilization and bandwidth, and improving the communication capability of the antenna assembly.

[0040] In the embodiment of the application, based on the first feed signal input to the first feed end F1 of the first radiation branch 100, a current path corresponding to the first frequency band can be formed on the surface of the first radiation branch 100. Moreover, through the second radiation branch 200 coupled to the first feed end F1 of the first radiation branch 100, and the first filter circuit connected to the end of the second radiation branch 200, another current path corresponding to the first frequency band can be formed on the surface of the second radiation branch 200. Therefore, the first feed signal can excite the two radiation branches to synchronously generate the first current and the second current, so that the second radiation branch 200 and the first radiation branch 100 share the radiation of the radio frequency signal supporting the first frequency band, thereby effectively improving the radiation performance of the antenna assembly in the first frequency band, and then improving the communication capability of the electronic device.

[0041] Figure 2 is a schematic diagram of current distribution of an antenna assembly according to an embodiment, referring to Figure 2In one embodiment, the second current is transmitted from the first feeding terminal F1 to the ground through the end of the second radiation branch 200 close to the first feeding terminal F1 and the first filter circuit. Therefore, the position where the first filter circuit is connected on the second radiation branch 200 will affect the return path of the second current, thereby changing the frequency band corresponding to the second current generated on the surface of the second radiation branch 200. Moreover, factors such as the gap width and coupling area between the first radiation branch 100 and the second radiation branch 200 will also affect the frequency band corresponding to the second current generated on the surface of the second radiation branch 200. Therefore, the above settings can be changed so that the frequency band corresponding to the second current generated on the second radiation branch 200 is the first frequency band, so that the second radiation branch 200 and the first radiation branch 100 jointly support the radiation of the RF signal of the first frequency band.

[0042] In one embodiment, in conjunction with reference Figure 1 and Figure 2 The first radiation branch 100 also has a first ground terminal G1 arranged opposite to the first feeding terminal F1. The first ground terminal G1 can be directly electrically connected to the floor, or can be indirectly electrically connected. For example, the first ground terminal G1 can be directly welded to the floor, or can be electrically connected through electrical connectors such as conductive wires, conductive springs, conductive glue, and circuit boards. The first current is a current in a 1 / 4 wavelength mode from the first feeding terminal F1 to the first ground terminal G1. Among them, the wavelength of the 1 / 4 wavelength mode refers to the wavelength corresponding to the center frequency of the first frequency band, and the 1 / 4 wavelength mode is also called the fundamental mode. When the first radiation branch 100 supports the first frequency band, it operates in the fundamental mode and has a higher radiation efficiency.

[0043] In one embodiment, the first current is used to support the radiation of the radio frequency signal of the first sub-band in the first frequency band, and the second current is used to support the radiation of the radio frequency signal of the second sub-band in the first frequency band, and the first sub-band and the second sub-band are different. Specifically, when the sub-bands supported by the first current and the second current are different, it can be understood that the antenna component adds a resonant mode in the first frequency band, thereby forming a dual wave and achieving an improvement in bandwidth.

[0044] In one embodiment, the first frequency band is a WIFI 5G frequency band, the first sub-frequency band covers a frequency of 5.1 GHz, and the second sub-frequency band covers a frequency of 5.8 GHz. The first sub-frequency band covers a frequency of 5.1 GHz, which means that the frequency band covered by the first sub-frequency band includes at least a frequency of 5.1 GHz, and the second sub-frequency band covers a frequency of 5.8 GHz, which means that the frequency band covered by the second sub-frequency band includes at least a frequency of 5.8 GHz. Specifically, Figure 3 is a Smith chart of the antenna assembly when the second radiation branch 200 is not provided, Figure 4FIG. 1 is one of the Smith charts of an antenna assembly having a second radiation branch 200 and a second filtering circuit in accordance with an embodiment of the present invention. Figure 3 and Figure 4 , in the figure, mark 1 is the impedance of 5.1GHz, and mark 2 is the impedance of 5.8GHz. Before setting the second radiation branch 200 and the second filtering circuit, the distance between mark 1 of 5.1GHz and mark 2 of 5.8GHz is approximately equal to half a coil, so the antenna assembly can only form a resonant mode that supports the first frequency band. However, after setting the second radiation branch 200 and the second filtering circuit, the distance between mark 1 of 5.1GHz and mark 2 of 5.8GHz is approximately equal to one coil, thereby enabling the antenna assembly to form another resonant mode that supports the first frequency band, thereby improving the bandwidth and radiation efficiency of the antenna assembly in the WIFI 5G frequency band.

[0045] Figure 5 The S11 curve of an antenna assembly of an embodiment, wherein S11 is called the input reflection coefficient, which refers to the proportional relationship between the incident wave and the reflected wave. S11 reflects how much incident energy is reflected back by the load, and is usually used to measure the input matching of antennas, RF devices, etc. That is, the lower the value of S11, the less reflection and the better the input matching. Figure 5 Based on the aforementioned configuration of the first radiation branch 100 and the second radiation branch 200, the antenna assembly can well cover the WIFI 5G frequency band from 5.1GHz to 5.8GHz. Moreover, the S11 parameters at each key frequency point have good performance, for example, the S11 at 5.1GHz is -7.28dB, and the S11 at 803MHz is -6.95dB.

[0046] In one of the embodiments, the impedance of the radiating branches in the antenna assembly can be adjusted by changing the elements and parameters in the first filter circuit, thereby improving the radiation performance of the antenna assembly in the first frequency band. Specifically, the first filter circuit may include at least one of a capacitor and an inductor. Among them, any of a series inductor, a parallel capacitor, a series capacitor and a parallel inductor on the feeding path can change the impedance of the frequency point, but different connection methods have different effects on different frequency points. Some connection methods can cause greater changes in the impedance of relatively high frequency points, while other connection methods can cause greater changes in the impedance of relatively low frequency points. Therefore, this embodiment does not limit the specific connection method of the elements in the first filter circuit, as long as it is possible to make one more turn on the Smith chart by changing the impedance of at least one frequency point, a new resonant mode can be added.

[0047] Figure 6 FIG. 2 is a schematic diagram of a first filter circuit 210 and a second radiation branch 200 according to an embodiment of the present invention. Figure 6, illustratively, the first filter circuit 210 includes a first inductor L1 and a first capacitor C1, one end of the first capacitor C1 is grounded, and the two ends of the first inductor L1 are respectively connected to the second radiation branch 200 and the other end of the first capacitor C1, thereby forming a first filter circuit 210 with bandpass filtering performance. Among them, the inductance value of the first inductor L1 can be 2nH, and the capacitance value of the first capacitor C1 can be 0.5pF. It should be noted that the values ​​of the first inductor L1 and the first capacitor C1 are only used for exemplary description, and are not used to limit the protection scope of this embodiment. Specifically, they can be adaptively adjusted according to the filtering frequency band of the first filter circuit 210 and the impedance matching of the second radiation branch 200.

[0048] Figure 7 The second Smith chart of the antenna assembly with the second radiation branch 200 and the first filter circuit 210 is shown in FIG. Figure 4 and Figure 7 After changing the components and parameters in the first filter circuit 210, the distance between the 5.1 GHz mark 1 and the 5.8 GHz mark 2 is still approximately equal to one coil. Therefore, the antenna assembly can form two resonant modes supporting the first frequency band, thereby improving the bandwidth of the antenna assembly in the WIFI 5G frequency band. However, Figure 4 The coil size between mark 1 and mark 2 is Figure 7 The coil size between the mark 1 and the mark 2 is different, and the coil size is associated with the size of the intermediate wave between the two marked frequency points. Therefore, taking the first frequency band as the WIFI 5G frequency band as an example, by changing the components and parameters in the second filtering circuit 110, the size of the intermediate wave between 5.1 GHz and 5.8 GHz can be changed.

[0049] In one of the embodiments, the impedance of the radiating branch in the antenna assembly can be adjusted by changing the coupling parameters between the first radiating branch 100 and the second radiating branch 200, thereby improving the radiation performance of the antenna assembly in the first frequency band. The coupling parameters between the first radiating branch 100 and the second radiating branch 200 include but are not limited to relative area and relative distance. However, it can be understood that in electronic devices, the gap width between each radiating branch is usually uniformly 1mm to 1.2mm. That is, the adjustable range of the relative distance is small. Therefore, the frequency of the antenna assembly can be adjusted by changing the coupling area between the first radiating branch 100 and the second radiating branch 200, thereby improving the bandwidth and radiation efficiency of the antenna assembly in the WIFI 5G frequency band.

[0050] Figure 8 The third Smith chart of the antenna assembly with the second radiation branch 200 and the second filter circuit 110 is provided in accordance with an embodiment. Figure 7 and Figure 8, Figure 7 and Figure 8 The first filter circuit 210 is the same as the first filter circuit 210. After changing the coupling area between the first radiation branch 100 and the second radiation branch 200, the distance between the 5.1GHz mark 1 and the 5.8GHz mark 2 is still approximately equal to one coil. Therefore, the antenna assembly can form two resonant modes supporting the first frequency band, thereby improving the bandwidth of the antenna assembly in the WIFI 5G frequency band. However, Figure 7 The coil position between marker 1 and marker 2 is Figure 8 The coil position between the mark 1 and the mark 2 is different, and the coil position is associated with the position of the intermediate wave between the two marked frequency points. Therefore, taking the first frequency band as the WIFI 5G frequency band as an example, by changing the coupling area between the first radiation branch 100 and the second radiation branch 200, the position of the intermediate wave between 5.1 GHz and 5.8 GHz can be changed.

[0051] Fig. 9 FIG. 1 is a schematic diagram of a second filter circuit 110 and a first radiation branch 100 according to an embodiment of the present invention. Fig. 9 In one embodiment, the antenna assembly further includes a second filter circuit 110, one end of the second filter circuit 110 is connected to the first feed end F1 of the first radiation branch 100, and the other end of the second filter circuit 110 is grounded. The second filter circuit 110 is used to adjust the impedance of the first radiation branch 100 to the target impedance range, and is also used to allow currents in frequency bands other than the first frequency band to pass through, so as to filter out the clutter currents generated by the coupling between the first radiation branch 100 and other adjacent radiation branches, for example, low-frequency clutter currents can be filtered out. Exemplarily, the second filter circuit 110 includes a second inductor L2, a second capacitor C2 and a first resistor R1. One end of the second inductor L2 is grounded, one end of the second capacitor C2 is connected to the first radiation branch 100, and the two ends of the first resistor R1 are respectively connected to the other end of the second inductor L2 and the other end of the second capacitor C2. Among them, the inductance value of the second inductor L2 can be 1.5nH, and the capacitance value of the second capacitor C2 can be 0.3pF. It should be noted that the values ​​of the second inductor L2 and the second capacitor C2 are only used for exemplary description and are not used to limit the protection scope of this embodiment. They can be adaptively adjusted according to the filtering frequency band of the second filtering circuit 110 and the impedance matching of the second radiation branch 200.

[0052] In the embodiment of the application, the second filter circuit 110 not only has the function of impedance matching, but also can further improve the radiation performance of the antenna component in the first frequency band by filtering out the clutter current, thereby improving the communication capability of the electronic device. Moreover, compared with the case of narrow bandwidth, this embodiment improves the bandwidth of the antenna component in the first frequency band, and only needs Fig. 9As shown, two matches are set so that the frequency band covered by the entire antenna assembly corresponds to the first frequency band, without adjusting the impedance of the frequency points between the relatively low frequency point and the relatively high frequency point. This can reduce the number of matches required to be set in the antenna assembly and reduce the loss problem caused by too many matches.

[0053] Continue to refer Figure 1 In one embodiment, the second radiation branch node 200 has a second feeding terminal F2, and the second feeding terminal F2 is arranged close to the first radiation branch node 100. The second radiation branch node 200 is used to generate a third current under the excitation of the second feeding signal input by the second feeding terminal F2 to support the radiation of the radio frequency signal in the second frequency band. Among them, the second frequency band is different from the first frequency band, and the first filter circuit 210 is also used to isolate the signal of the second frequency band. Specifically, the second frequency band can be a medium and high frequency band of the cellular. The medium and high frequency bands include but are not limited to the N1 band, the N3 band, the N40 band, the N41 band and the N78 band. Accordingly, the length of the second radiation branch node 200 can be set according to its resonant mode, and the length of the second radiation branch node 200 can be, for example, approximately 33.3 mm.

[0054] In one embodiment, the second radiation branch 200 also has a first free end arranged opposite to the second feed end F2, and the antenna assembly also includes a third radiation branch 300. The third radiation branch 300 has a second free end and a second ground end G2. The second ground end G2 can be directly electrically connected to the floor or indirectly electrically connected. For example, the second ground end G2 can be directly welded to the floor, or electrically connected through electrical connectors such as conductive wires, conductive springs, conductive glue, and circuit boards. The second free end is arranged near the second free end of the second radiation branch 200, and the second free end is coupled to the first free end so that the third radiation branch 300 generates a fourth current under the excitation of the second feed signal to support the radiation of the radio frequency signal in the second frequency band. That is, the third radiation branch 300 and the second radiation branch 200 can achieve the transfer of radiation energy through the gap. Among them, the coupling between the third radiation branch 300 and the second radiation branch 200 is mainly electric field coupling. Further, the length of the third radiation branch 300 can be about 11.6 mm.

[0055] The embodiment of the present application further provides an electronic device, comprising the antenna assembly as described above. Based on the above antenna assembly, the electronic device of the embodiment can have better radiation performance in the first frequency band.

[0056] Fig.10 FIG. 1 is a partial rear view of an electronic device according to an embodiment of the present invention, referring to FIG. Fig.10In one embodiment, the electronic device includes a frame, the frame includes a top frame 11 and a bottom frame (not shown) arranged opposite to each other, and a first side frame 12 and a second side frame 13 connected to the top frame 11 and the bottom frame. The first radiation branch 100 and the second radiation branch 200 of the antenna assembly are arranged on the same side frame, and the first radiation branch 100 is arranged in the middle of the side frame. Fig.10 In the illustrated embodiment, the first radiation branch 100 and the second radiation branch 200 are both disposed on the first side frame 12 on the right side of the electronic device, where the right side refers to the right hand side of the user when the user faces the display screen. The first radiation branch 100 is located on the side close to the top frame 11, and the second radiation branch 200 is located on the side close to the bottom frame. It is understandable that the electronic device may also include Fig.10 Other radiating branches not shown.

[0057] In an electronic device, compared with the radiating branches located at the top frame 11 and the bottom frame, the radiating branches located at the side frame, especially the middle of the side frame, have less clearance. Therefore, the efficiency of the radiating branches located at this position is often low and carries clutter. For example, in the related art, the simulated average efficiency of the WIFI 5G radiating branch in the middle of the side frame is only -6dBm, and the antenna performance is insufficient. However, in this embodiment, by introducing a second radiating branch 200 coupled to the first radiating branch 100, and forming a return path for the second current in the first frequency band through the first filter circuit 210, it can be coordinated with the first current on the first radiating branch 100, so as to realize double double waves in the first frequency band, greatly improve the bandwidth of the antenna assembly in the first frequency band, so that the first radiating branch 100 located in the middle of the side frame can also have better radiation performance. Therefore, the area with a larger clearance can be used to set radiating branches of other frequency bands to improve the overall radiation performance of the electronic device in each frequency band.

[0058] In one embodiment, the antenna assembly further includes a fourth radiating branch (not shown). The fourth radiating branch is used to support MIMO transmission and reception of radio frequency signals in the first frequency band, and the fourth radiating branch is arranged on the top frame 11. That is, the fourth radiating branch is located in an area with better clearance and can have better radiation performance. MIMO technology can significantly increase the data transmission rate without increasing the bandwidth by using multiple antennas at the transmitting end and the receiving end at the same time. Therefore, corresponding to communication frequency bands with higher speeds such as WIFI 5G, MIMO technology can further improve the communication rate of electronic devices and improve the short-distance communication capabilities of electronic devices based on WIFI 5G.

[0059] In one embodiment, an electronic device is provided. Fig.11The figure is an internal structure diagram of an electronic device of an embodiment. The electronic device includes a processor, a memory, a communication interface, a display screen and an input device connected through a system bus. Among them, the processor of the electronic device is used to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the electronic device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be realized through WIFI, a mobile cellular network, NFC (near field communication) or other technologies. The display screen of the electronic device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the electronic device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the housing of the electronic device, or an external keyboard, touchpad or mouse, etc.

[0060] Those skilled in the art will understand that Fig.11 The structure shown in the figure is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0061] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The above embodiments only express several implementation methods of the embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the embodiments of the present application, and these all belong to the protection scope of the embodiments of the present application. Therefore, the protection scope of the patent of the embodiments of the present application shall be subject to the attached claims.

Claims

1. An antenna assembly, characterized in that: include: A first radiation branch node has a first feeding end, and the first radiation branch node is used to generate a first current under the stimulation of a first feeding signal inputted from the first feeding end; a second radiation branch, which is spaced apart from the first radiation branch, and an end of the second radiation branch close to the first feeding end is coupled to the first feeding end, so that the second radiation branch generates a second current under the stimulation of the first feeding signal; A first filter circuit, one end of which is connected to one end of the second radiation branch close to the first feeding end, and the other end of the first filter circuit is grounded, and the first filter circuit is used to allow a second current of a first frequency band to pass through so that the second radiation branch and the first radiation branch share the radiation of a radio frequency signal supporting the first frequency band.

2. The antenna assembly according to claim 1, characterized in that: The second current is transmitted from the first feeding end through an end of the second radiation branch close to the first feeding end and the first filtering circuit to the ground.

3. The antenna assembly according to any one of claims 1 to 2, characterized in that: The first current is used to support radiation of radio frequency signals in a first sub-band in the first frequency band, and the second current is used to support radiation of radio frequency signals in a second sub-band in the first frequency band, and the first sub-band and the second sub-band are different.

4. The antenna assembly according to claim 3, characterized in that: The first frequency band is the WIFI 5G frequency band, the first sub-frequency band covers a frequency of 5.1 GHz, and the second sub-frequency band covers a frequency of 5.8 GHz.

5. The antenna assembly according to claim 3, characterized in that: The first radiation branch also has a first grounding terminal arranged opposite to the first feeding terminal; The first current is a current in a 1 / 4 wavelength mode from the first feeding end to the first ground end.

6. The antenna assembly according to claim 3, characterized in that: Also includes: A second filter circuit, one end of the second filter circuit is connected to the first feeding end of the first radiation branch, and the other end of the second filter circuit is grounded. The second filter circuit is used to adjust the impedance of the first radiation branch to a target impedance range, and is also used to allow current in frequency bands other than the first frequency band to pass through.

7. The antenna assembly according to claim 3, characterized in that: The second radiation branch has a second feeding end, the second feeding end is arranged close to the first radiation branch, and the second radiation branch is used to generate a third current under the stimulation of a second feeding signal inputted from the second feeding end to support the radiation of a radio frequency signal in a second frequency band; The second frequency band is different from the first frequency band, and the first filtering circuit is further used to isolate signals in the second frequency band.

8. The antenna assembly according to claim 7, characterized in that: The second radiation branch further has a first free end arranged opposite to the second feeding end, and the antenna assembly further includes: The third radiating branch has a second free end and a second ground end, the second free end is arranged close to the second free end of the second radiating branch, and the second free end is coupled to the first free end so that the third radiating branch generates a fourth current under the excitation of the second feed signal to support the radiation of the RF signal in the second frequency band.

9. An electronic device, characterized in that: Comprising the antenna assembly according to any one of claims 1 to 8.

10. The electronic device according to claim 9, characterized in that: The electronic device comprises a frame, wherein the frame comprises a top frame and a bottom frame arranged opposite to each other, and a first side frame and a second side frame connected to the top frame and the bottom frame; The first radiation branch and the second radiation branch of the antenna assembly are arranged on the same side frame, and the first radiation branch is arranged in the middle of the side frame.

11. The electronic device according to claim 10, characterized in that: The antenna assembly further comprises: The fourth radiation branch is used to support MIMO transmission and reception of radio frequency signals in the first frequency band, and the fourth radiation branch is arranged on the top frame.

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