CN219040740U - Antenna assembly and terminal equipment - Google Patents

Abstract

The present disclosure proposes an antenna assembly and a terminal device, wherein the antenna assembly comprises: metal frame, metal frame includes: the antenna comprises a first radiation arm, a coupling arm and a fracture, wherein the fracture is arranged between the first radiation arm and the coupling arm, a first feed point is arranged at one end of the first radiation arm close to the fracture, and the other end of the first radiation arm far away from the fracture is grounded; the first end of matching circuit links to each other with low frequency signal or high frequency signal, and matching circuit's second end links to each other with first feed point, and matching circuit includes: and the impedance switching component is used for switching the impedance of the matching circuit so as to enable the impedance of the matching circuit to match a low-frequency signal or a high-frequency signal. In the antenna assembly and the terminal equipment, the antenna assembly has smaller volume so as to adapt to the limited space in the terminal equipment, and has wider frequency band while keeping higher radiation efficiency, so that the performance of the antenna assembly is effectively improved.

Description

Antenna assembly and terminal equipment

Technical Field

The disclosure relates to the field of antenna technology, and in particular, to an antenna assembly and a terminal device.

Background

With the development of miniaturization and microminiaturization of terminal equipment, the available space in the terminal equipment is also smaller and smaller, and the antenna is an important component in the terminal equipment, and the performance of the antenna is reduced due to the increasingly smaller space, so that the antenna with wide frequency band and excellent performance needs to be designed in a limited space to meet the communication requirement of the terminal equipment.

Disclosure of Invention

The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.

To this end, an object of the present disclosure is to provide an antenna assembly and a terminal device.

To achieve the above object, a first aspect of the present disclosure provides an antenna assembly, including: a metal bezel comprising: the antenna comprises a first radiation arm, a coupling arm and a fracture, wherein the fracture is arranged between the first radiation arm and the coupling arm, a first feed point is arranged at one end of the first radiation arm, which is close to the fracture, and one end of the first radiation arm, which is far away from the fracture, is grounded; the first end of the matching circuit is connected with a low-frequency signal or a high-frequency signal, the second end of the matching circuit is connected with the first feed point, and the matching circuit comprises: and the impedance switching component is used for switching the impedance of the matching circuit so as to enable the impedance of the matching circuit to match the low-frequency signal or the high-frequency signal.

Optionally, the impedance switching assembly includes: a plurality of impedance paths, the impedance paths comprising: the first end of the capacitor is connected with the first feed point, the second end of the capacitor is connected with the first end of the switch, and the second end of the switch is grounded.

Optionally, the plurality of impedance paths includes: a first impedance path, the first impedance path comprising: the first end of the first capacitor is connected with the first feed point, the second end of the first capacitor is connected with the first end of the first switch, and the second end of the first switch is grounded; a second impedance path, the second impedance path comprising: the first end of the second capacitor is connected with the first end of the first switch, the second end of the second capacitor is connected with the first end of the second switch, and the second end of the second switch is connected with the second end of the first switch; a third impedance path, the third impedance path comprising: the first end of the third capacitor is connected with the first end of the second capacitor, the second end of the third capacitor is connected with the first end of the third switch, and the second end of the third switch is connected with the second end of the second switch; a fourth impedance path, the fourth impedance path comprising: the first end of the fourth capacitor is connected with the first end of the third capacitor, the second end of the fourth capacitor is connected with the first end of the fourth switch, and the second end of the fourth switch is connected with the second end of the third switch.

Optionally, the low frequency signal includes: 5g n71 band signals; the first switch, the second switch and the third switch are turned on, the fourth switch is turned off, and the first radiation arm radiates the 5G N71 frequency band signal.

Optionally, the high frequency signal includes: a 5g N78 band signal and an N79 band signal; the first switch, the second switch, the third switch and the fourth switch are conducted, the first radiating arm radiates the 5G N78 frequency band signal, and the first radiating arm is coupled with the coupling arm and radiates the N79 frequency band signal.

Optionally, the matching circuit further includes: a fifth capacitor, wherein a first end of the fifth capacitor is connected with the low-frequency signal or the high-frequency signal, and a second end of the fifth capacitor is grounded; the first end of the first inductor is connected with the first end of the fifth capacitor; a sixth capacitor, wherein a first end of the sixth capacitor is connected with a second end of the first inductor, and a second end of the sixth capacitor is connected with the first end of the capacitor; and the first end of the second inductor is connected with the first end of the capacitor, and the second end of the second inductor is grounded.

Optionally, the metal frame further includes: a second radiating arm, the second radiating arm comprising: the coupling arm, the coupling arm is kept away from the one end of fracture is provided with the second feed point, the second feed point links to each other with the medium-high frequency signal, the second radiation arm is kept away from the one end ground connection of fracture.

Optionally, the length of the first radiating arm is 39.6mm, the distance between the first feeding point and the break is 9mm, and the length of the coupling arm is 6.9mm.

A second aspect of the present disclosure provides a terminal device, including: an antenna assembly as provided in the first aspect of the present disclosure.

Optionally, the terminal device further includes: the middle frame is provided with a battery compartment, the antenna assembly is arranged at the position, close to the battery compartment, of the middle frame, and the first radiation arm and the second radiation arm of the antenna assembly are grounded through the middle frame; the main board is arranged on the middle frame, and the signal end of the main board is connected with the first end of the matching circuit of the antenna assembly.

The technical scheme provided by the disclosure can comprise the following beneficial effects:

through the setting of impedance switching assembly, make matching circuit can match low frequency signal and high frequency signal to make antenna assembly utilize first radiation arm and coupling arm just realize the radiation to low frequency signal and high frequency signal, from this, not only make antenna assembly have less volume, with the limited space in adapting to terminal equipment, but also make antenna assembly have wider frequency band when keeping higher radiation efficiency in addition, effectively improved antenna assembly's performance.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 2 is a schematic circuit diagram of a matching circuit in an antenna assembly according to an embodiment of the present disclosure;

fig. 3 is a schematic circuit diagram of a matching circuit in an antenna assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic circuit diagram of a matching circuit in an antenna assembly according to an embodiment of the present disclosure;

fig. 5 is a schematic circuit diagram of a matching circuit in an antenna assembly according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

fig. 8 is a simulation graph of an antenna assembly according to an embodiment of the present disclosure;

fig. 9 is a simulation graph of an antenna assembly according to an embodiment of the present disclosure;

fig. 10 is a simulation graph of an antenna assembly according to an embodiment of the present disclosure;

FIG. 11 is a simulation graph of an antenna assembly according to an embodiment of the present disclosure;

as shown in the figure: 1. a metal frame;

101. a first radiating arm, 1011, a first feed point;

102. a second radiating arm 1021, a coupling arm 1022, a second feeding point;

103. breaking the seam;

2. a matching circuit 201, an impedance switching component, 2011, an impedance path, 2012, a first impedance path, 2013, a second impedance path, 2014, a third impedance path, 2015, a fourth impedance path;

C. the capacitor comprises a capacitor C1, a first capacitor, a capacitor C2, a second capacitor, a capacitor C3, a third capacitor, a capacitor C4 and a fourth capacitor;

c5, fifth capacitance, C6, sixth capacitance;

l1, a first inductor, L2 and a second inductor;

SW, switch, SW1, first switch, SW2, second switch, SW3, third switch, SW4, fourth switch;

3. middle frame 301, battery compartment.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present disclosure and are not to be construed as limiting the present disclosure. On the contrary, the embodiments of the disclosure include all alternatives, modifications, and equivalents as may be included within the spirit and scope of the appended claims.

As shown in fig. 1, an embodiment of the disclosure proposes an antenna assembly, including a metal frame 1 and a matching circuit 2, where the metal frame 1 includes a first radiating arm 101, a coupling arm 1021, and a break 103, the break 103 is disposed between the first radiating arm 101 and the coupling arm 1021, one end of the first radiating arm 101 near the break 103 is provided with a first feeding point 1011, one end of the first radiating arm 101 far away from the break 103 is grounded, a first end of the matching circuit 2 is connected to a Low-frequency (LB) signal or a High-frequency (High-Band, HB) signal, a second end of the matching circuit 2 is connected to the first feeding point 1011, the matching circuit 2 includes an impedance switching component 201, and the impedance switching component 201 is configured to switch an impedance of the matching circuit 2, so that the impedance of the matching circuit 2 matches the Low-frequency signal or the High-frequency signal.

It can be understood that the low-frequency signal enters the first radiation arm 101 from the first feeding point 1011 after passing through the matching circuit 2, and the matching circuit 2 can perform impedance tuning on the low-frequency signal under the switching of the impedance switching component 201, so that the high-efficiency radiation of the low-frequency signal by the first radiation arm 101 is ensured.

The high-frequency signal enters the first radiation arm 101 from the first feeding point 1011 after passing through the matching circuit 2, and the matching circuit 2 can perform impedance tuning on the high-frequency signal under the switching of the impedance switching component 201, so that the high-efficiency radiation of the high-frequency signal by the first radiation arm 101 and the coupling arm 1021 is ensured.

By setting the impedance switching assembly 201, the matching circuit 2 can match the low-frequency signal and the high-frequency signal, so that the antenna assembly can radiate the low-frequency signal and the high-frequency signal only by using the first radiating arm 101 and the coupling arm 1021, thereby not only enabling the antenna assembly to have smaller volume so as to adapt to the limited space in the terminal equipment, but also enabling the antenna assembly to have wider frequency band while keeping higher radiation efficiency, and effectively improving the performance of the antenna assembly.

In the matching circuit 2, the smaller the impedance is, the higher the passing signal frequency is, whereas the larger the impedance is, the lower the passing signal frequency is, and therefore, the impedance switching unit 201 switches the impedance of the matching circuit 2 to a smaller value at the time of the high-frequency signal; conversely, at the time of low frequency signal, the impedance switching component 201 switches the impedance of the matching circuit 2 to a larger value.

The coupling arm 1021 is configured to couple with the first radiating arm 101, so as to cooperate with the first radiating arm 101 to radiate a part of the high-frequency signal.

As shown in fig. 2, in some embodiments, the impedance switching component 201 includes a plurality of impedance paths 2011, the impedance paths 2011 include a capacitor C and a switch SW, a first end of the capacitor C is connected to the first feeding point 1011, a second end of the capacitor C is connected to a first end of the switch SW, and a second end of the switch SW is grounded.

It will be appreciated that when the switch SW is on, the capacitor C is grounded, thereby reducing the impedance of the matching circuit 2, and when the switch SW is off, the capacitor C is disconnected from ground, and the capacitor C is disabled, thereby increasing the impedance of the matching circuit 2.

Therefore, by controlling the on and off of the plurality of switches SW, the impedance switching assembly 201 has various states, so that the matching circuit 2 can switch among various impedances to adapt to various frequency bands in the low-frequency signal and the high-frequency signal, thereby ensuring the broadband coverage of the antenna assembly and effectively improving the performance of the antenna assembly.

After the capacitors C are connected in parallel, the capacity of the whole capacitor increases, the impedance decreases, and accordingly, the frequency of the signal passing through increases.

The specific number of the impedance paths 2011 may be set according to actual use requirements, which is not limited.

As shown in fig. 3, in some embodiments, the plurality of impedance paths 2011 includes a first impedance path 2012, a second impedance path 2013, a third impedance path 2014, and a fourth impedance path 2015, the first impedance path 2012 includes a first capacitor C1 and a first switch SW1, a first end of the first capacitor C1 is connected to the first feed point 1011, a second end of the first capacitor C1 is connected to a first end of the first switch SW1, a second end of the first switch SW1 is grounded, the second impedance path 2013 includes a second capacitor C2 and a second switch SW2, a first end of the second capacitor C2 is connected to a first end of the first capacitor C1, a second end of the second capacitor C2 is connected to a first end of the second switch SW2, a second end of the second switch SW2 is connected to a second end of the first switch SW1, the third impedance path 2014 includes a third capacitor C3 and a third switch SW3, a first end of the third capacitor C3 is connected to a first end of the second capacitor C2, a second end of the third capacitor C3 is connected to a fourth end of the fourth switch SW4, a second end of the fourth switch SW4 is connected to a fourth end of the fourth switch SW4, and a second end of the fourth switch SW4 is connected to a fourth end of the fourth switch SW 4.

It can be understood that by controlling the on and off states of the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4, the impedance switching assembly 201 can have sixteen states at most, so that the matching circuit 2 can switch among sixteen impedances to adapt to various frequency bands in the low-frequency signal and the high-frequency signal, thereby ensuring the broadband coverage of the antenna assembly and effectively improving the performance of the antenna assembly.

It should be noted that, the capacitance values of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 may be the same or different, where if the capacitance values of some or all of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are the same, the states of the impedance switching component 201 are overlapped, so that the number of states that the impedance switching component 201 can switch is reduced, and considering multiple frequency bands in the low-frequency signal and the high-frequency signal, the capacitance values of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are set to be different, so as to ensure coverage of the antenna component on the multiple frequency bands in the low-frequency signal and the high-frequency signal.

Specific capacitance values of the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 may be set according to actual needs, which is not limited.

The on and off states of the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4 may be determined according to specific frequency bands in the low frequency signal and the high frequency signal, which is not limited.

As shown in fig. 4, in some embodiments, the low frequency signal includes a 5G (5 th-Generation-Mobile-Communication-Technology, fifth Generation Mobile Communication Technology) N71 band signal, wherein the first switch SW1, the second switch SW2 and the third switch SW3 are turned on, the fourth switch SW4 is turned off, and the first radiating arm 101 radiates the 5G N71 band signal.

It can be understood that the first switch SW1, the second switch SW2 and the third switch SW3 are turned on, and the fourth switch SW4 is turned off, so that the first capacitor C1, the second capacitor C2 and the third capacitor C3 are connected in parallel, and the fourth capacitor C4 is not used, so that the impedance of the matching circuit 2 can adapt to the 5g n71 frequency band signal in the low-frequency signal, and high-efficiency radiation of the antenna assembly to the 5g n71 frequency band signal is ensured.

The specific frequency band of the 5G N71 frequency band signal is 0.617GHz-0.96GHz.

As shown in fig. 5, in some embodiments, the high frequency signal includes a 5g N78 band signal and an N79 band signal, wherein the first switch SW1, the second switch SW2, the third switch SW3, and the fourth switch SW4 are turned on, the first radiating arm 101 radiates the 5g N78 band signal, and the first radiating arm 101 is coupled with the coupling arm 1021 and radiates the N79 band signal.

It can be understood that the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4 are turned on, so that the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are connected in parallel, thereby enabling the impedance of the matching circuit 2 to adapt to the 5g n78 band signal in the high-frequency signal, and ensuring efficient radiation of the antenna assembly to the 5g n78 band signal.

Due to the arrangement of the coupling arm 1021, the first radiating arm 101 is coupled with the coupling arm 1021 while radiating the 5g N78 frequency band signal, so that the first radiating arm 101 and the coupling arm 1021 jointly radiate the 5g N79 frequency band signal, and the antenna assembly is ensured to radiate the 5g N78 frequency band signal and simultaneously radiate the N79 frequency band signal with high efficiency.

It should be noted that, when the first switch SW1, the second switch SW2, the third switch SW3 and the fourth switch SW4 are turned on, a quarter mode of the 5g N78 band signal, that is, an eigen mode of the 5g N78 band signal is excited on the first radiating arm 101, and then the 5g N79 band signal is parasitically excited by the coupling arm 1021, so that simultaneous radiation of the 5g N78 band signal and the N79 band signal by the antenna assembly is realized.

The specific frequency band of the 5G N78 frequency band signal is 3.3GHz-3.8GHz, and the specific frequency band of the 5G N79 frequency band signal is 4.4GHz-5GHz.

From this, it can be seen that the frequency band span between the 5g N78 frequency band signal and the N79 frequency band signal and the 5g N71 frequency band signal is extremely large, so that the 5g N78 frequency band signal and the N79 frequency band signal are difficult to coexist on the same antenna with the 5g N71 frequency band signal, and in this embodiment, the coexistence of the 5g N78 frequency band signal and the N79 frequency band signal with the 5g N71 frequency band signal is realized by using the state switching of the impedance switching component 201, so that the antenna component has a wider frequency band while maintaining a higher radiation efficiency, and the performance of the antenna component is effectively improved.

As shown in fig. 3, 4 and 5, in some embodiments, the matching circuit 2 further includes a fifth capacitor C5, a first inductor L1, a sixth capacitor C6 and a second inductor L2, where a first end of the fifth capacitor C5 is connected to the low frequency signal or the high frequency signal, a second end of the fifth capacitor C5 is grounded, a first end of the first inductor L1 is connected to the first end of the fifth capacitor C5, a first end of the sixth capacitor C6 is connected to the second end of the first inductor L1, a second end of the sixth capacitor C6 is connected to the first end of the capacitor C, a first end of the second inductor L2 is connected to the first end of the capacitor C, and a second end of the second inductor L2 is grounded.

It can be understood that, by matching the fifth capacitor C5, the first inductor L1 and the impedance switching component 201, the impedance of the matching circuit 2 can adapt to multiple frequency bands in the high-frequency signal, so as to ensure the broadband coverage of the antenna component and effectively improve the performance of the antenna component; through the cooperation of the sixth capacitor C6, the second inductor L2 and the impedance switching component 201, the impedance of the matching circuit 2 can adapt to various frequency bands in low-frequency signals, broadband coverage of the antenna component is ensured, and performance of the antenna component is effectively improved.

It should be noted that the specific capacitance values of the fifth capacitor C5 and the sixth capacitor C6 may be set according to actual needs, which is not limited.

Specific inductance values of the first inductor L1 and the second inductor L2 may be set according to actual needs, which is not limited.

As shown in fig. 6, in some embodiments, the metal frame 1 further includes a second radiating arm 102, where the second radiating arm 102 includes a coupling arm 1021, and an end of the coupling arm 1021 away from the break 103 is provided with a second feeding point 1022, where the second feeding point 1022 is connected to a mid-Band (MB) signal, and an end of the second radiating arm 102 away from the break 103 is grounded.

It can be understood that the medium-high frequency signal enters the second radiating arm 102 from the second feeding point 1022, so that efficient radiation of the medium-high frequency signal by the second radiating arm 102 is realized, and the antenna assembly further widens the frequency band while maintaining higher radiation efficiency, and effectively improves the performance of the antenna assembly.

The coupling arm 1021 is not only used for coupling with the first radiating arm 101 to radiate a 5g n79 frequency band signal, but also used as a part of the second radiating arm 102 to radiate a medium-high frequency signal, so that the coupling arm 1021 is fully utilized, and the antenna assembly has a smaller volume and simultaneously improves the performance of the antenna assembly.

In some embodiments, the length of the first radiating arm 101 is 39.6mm, the distance between the first feeding point 1011 and the break 103 is 9mm, and the length of the coupling arm 1021 is 6.9mm.

It can be appreciated that by setting the dimensions of the first radiating arm 101, the first feeding point 1011 and the coupling arm 1021, efficient radiation of the low-frequency signal and the high-frequency signal by the first radiating arm 101 and the coupling arm 1021 is ensured, so that the antenna assembly has a wider frequency band and can maintain a higher radiation efficiency.

Wherein, since the distance between the first feeding point 1011 and the break 103 is 9mm, the position of the first feeding point 1011 can separate the transmitting frequency band and the receiving frequency band of the 5g n71 frequency band signal in the low frequency signal, thereby improving the radiation efficiency of the first radiation arm 101 and further improving the performance of the antenna assembly.

In the simulation experiment, the state of the impedance switching component 201 was traversed, and simulation graphs as shown in fig. 8 and 9 were obtained.

In fig. 8, the abscissa is the frequency of the signal, the frequency range of the abscissa is 600MHz-1GHz, the ordinate is the return loss, and the units are dB, each curve represents one state of the impedance switching element 201, and it can be seen from fig. 8 that in the different states of the impedance switching element 201, the antenna element has a wider frequency band with a return loss lower than-3 dB in each state in the 600MHz-1GHz interval.

In fig. 9, the abscissa is the frequency of the signal, the frequency range of the abscissa is 600MHz-700MHz, the ordinate is the return loss, and the units are dB, each curve represents one state of the impedance switching element 201, and it can be seen from fig. 9 that in the different states of the impedance switching element 201, the antenna element has a wider frequency band with a return loss lower than-3 dB in each state in the interval 600MHz-700 MHz.

It can be seen that the antenna assembly has a wider frequency band while maintaining a higher radiation efficiency.

The 5g n71 band was traversed to obtain a simulation graph as shown in fig. 10.

In fig. 10, the abscissa indicates the frequency of the signal, the frequency range of the abscissa indicates 600MHz-700MHz, the ordinate indicates the radiation efficiency in dB, each curve represents one frequency band in the 5g n71 frequency band, it can be seen from fig. 10 that the antenna assembly has higher radiation efficiency in each frequency band signal in the 5g n71 frequency band, and the transmitting frequency band and the receiving frequency band in the 5g n71 frequency band can be separated.

The low frequency band is traversed to obtain a simulation graph as shown in fig. 11.

In fig. 11, the abscissa indicates the frequency of the signal, the frequency range of the abscissa is 600MHz-1000MHz, the ordinate indicates the radiation efficiency in dB, and each curve represents a frequency band in the low frequency band, and as can be seen from fig. 11, the antenna assembly has a higher radiation efficiency in each frequency band signal in the low frequency band.

As shown in fig. 7, the embodiment of the present disclosure further proposes a terminal device including an antenna assembly as the embodiment of the present disclosure.

It can be understood that by setting the impedance switching component 201, the matching circuit 2 can match the low-frequency signal and the high-frequency signal, so that the antenna component can radiate the low-frequency signal and the high-frequency signal only by using the first radiating arm 101 and the coupling arm 1021, thereby not only enabling the antenna component to have a smaller volume so as to adapt to the limited space in the terminal device, but also enabling the antenna component to have a wider frequency band while maintaining a higher radiation efficiency, and effectively improving the performance of the antenna component.

It should be noted that, the specific type of the terminal device may be set according to actual needs, which is not limited to this, and the terminal device may be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted terminal, or the like.

As shown in fig. 7, in some embodiments, the terminal device further includes a middle frame 3 and a main board, a battery compartment 301 is disposed on the middle frame 3, the antenna assembly is disposed at a position where the middle frame 3 is close to the battery compartment 301, the first radiation arm 101 and the second radiation arm 102 of the antenna assembly are grounded through the middle frame 3, the main board is disposed on the middle frame 3, and a signal end of the main board is connected to a first end of the matching circuit 2 of the antenna assembly.

It can be understood that the antenna assembly is arranged near the battery compartment 301 of the middle frame 3, so that the space in the terminal equipment is effectively utilized, and the reasonable layout of the terminal equipment is ensured; through the setting of center 3, not only realize the installation of antenna module in terminal equipment, realize the ground connection of first radiation arm 101 and second radiation arm 102 moreover, guarantee antenna module to low frequency signal, high frequency signal and the coverage of medium and high frequency signal.

It should be noted that in the description of the present disclosure, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (10)

1. An antenna assembly, comprising:

a metal bezel comprising: the antenna comprises a first radiation arm, a coupling arm and a fracture, wherein the fracture is arranged between the first radiation arm and the coupling arm, a first feed point is arranged at one end of the first radiation arm, which is close to the fracture, and one end of the first radiation arm, which is far away from the fracture, is grounded;

the first end of the matching circuit is connected with a low-frequency signal or a high-frequency signal, the second end of the matching circuit is connected with the first feed point, and the matching circuit comprises: and the impedance switching component is used for switching the impedance of the matching circuit so as to enable the impedance of the matching circuit to match the low-frequency signal or the high-frequency signal.

2. The antenna assembly of claim 1, wherein the impedance switching assembly comprises:

a plurality of impedance paths, the impedance paths comprising: the first end of the capacitor is connected with the first feed point, the second end of the capacitor is connected with the first end of the switch, and the second end of the switch is grounded.

3. The antenna assembly of claim 2, wherein the plurality of impedance paths comprises:

a first impedance path, the first impedance path comprising: the first end of the first capacitor is connected with the first feed point, the second end of the first capacitor is connected with the first end of the first switch, and the second end of the first switch is grounded;

a second impedance path, the second impedance path comprising: the first end of the second capacitor is connected with the first end of the first switch, the second end of the second capacitor is connected with the first end of the second switch, and the second end of the second switch is connected with the second end of the first switch;

a third impedance path, the third impedance path comprising: the first end of the third capacitor is connected with the first end of the second capacitor, the second end of the third capacitor is connected with the first end of the third switch, and the second end of the third switch is connected with the second end of the second switch;

a fourth impedance path, the fourth impedance path comprising: the first end of the fourth capacitor is connected with the first end of the third capacitor, the second end of the fourth capacitor is connected with the first end of the fourth switch, and the second end of the fourth switch is connected with the second end of the third switch.

4. The antenna assembly of claim 3 wherein,

the low frequency signal includes: 5g n71 band signals;

the first switch, the second switch and the third switch are turned on, the fourth switch is turned off, and the first radiation arm radiates the 5G N71 frequency band signal.

5. The antenna assembly of claim 3 wherein,

the high frequency signal includes: 5g n78 band signal;

the first switch, the second switch, the third switch and the fourth switch are conducted, the first radiating arm radiates the 5G N78 frequency band signal, and the first radiating arm is coupled with the coupling arm and radiates the N79 frequency band signal.

6. The antenna assembly of claim 2, wherein the matching circuit further comprises:

a fifth capacitor, wherein a first end of the fifth capacitor is connected with the low-frequency signal or the high-frequency signal, and a second end of the fifth capacitor is grounded;

the first end of the first inductor is connected with the first end of the fifth capacitor;

a sixth capacitor, wherein a first end of the sixth capacitor is connected with a second end of the first inductor, and a second end of the sixth capacitor is connected with the first end of the capacitor;

and the first end of the second inductor is connected with the first end of the capacitor, and the second end of the second inductor is grounded.

7. The antenna assembly of claim 1, wherein the metal bezel further comprises:

a second radiating arm, the second radiating arm comprising: the coupling arm, the coupling arm is kept away from the one end of fracture is provided with the second feed point, the second feed point links to each other with the medium-high frequency signal, the second radiation arm is kept away from the one end ground connection of fracture.

8. The antenna assembly of claim 1, wherein the length of the first radiating arm is 39.6mm, the first feed point is 9mm from the break, and the length of the coupling arm is 6.9mm.

9. A terminal device, comprising: an antenna assembly as claimed in any one of claims 1 to 8.

10. The terminal device according to claim 9, characterized in that the terminal device further comprises:

the middle frame is provided with a battery compartment, the antenna assembly is arranged at the position, close to the battery compartment, of the middle frame, and the first radiation arm and the second radiation arm of the antenna assembly are grounded through the middle frame;

the main board is arranged on the middle frame, and the signal end of the main board is connected with the first end of the matching circuit of the antenna assembly.

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