WO2017202033A1

WO2017202033A1 - Built-in antenna for terminal device, and terminal device

Info

Publication number: WO2017202033A1
Application number: PCT/CN2017/070177
Authority: WO
Inventors: 邓麒
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-27
Filing date: 2017-01-04
Publication date: 2017-11-30
Also published as: CN107437662A

Abstract

Provided are a built-in antenna for a terminal device, and a terminal device. The antenna comprises: a main body portion, wherein the main body portion comprises a closed ring structure; a ground feed point for connecting the closed ring structure and a circuit board of the terminal device is arranged at a first position of the closed ring structure, and a feed point for connecting the closed ring structure and the circuit board is arranged at a second position of the closed ring structure; and a clearance area is formed between the closed ring structure and the circuit board. The embodiments of the present invention can reduce the wiring space of an antenna.

Description

Terminal device built-in antenna and terminal device

Technical field

The embodiments of the present invention relate to the field of communications technologies, and in particular, to a built-in antenna and a terminal device of a terminal device.

Background technique

At present, the structure of the antenna built in the terminal device is often an open-loop structure, such as an IFA antenna, a LOOP antenna, and a monopole antenna. At present, the antenna built in the terminal device is often provided with a ground feed point connected to the circuit board at the end of the open loop structure, or a feed point connected to the circuit board at the other end of the antenna ring structure. Due to the open-loop structure of the antenna built in the terminal device, and the feeding point and the feeding point at the end of the open-loop structure, the wiring space of the antenna is large.

Summary of the invention

The embodiment of the invention provides a built-in antenna and a terminal device of the terminal device, so as to at least solve the problem that the antenna has a large wiring space.

According to an embodiment of the present invention, there is provided a terminal device built-in antenna, comprising: a body portion, wherein the body portion includes a closed loop structure, the closed loop structure is disposed at a first position of the closed loop structure and a ground feed point of the circuit board connection of the terminal device, and a feed point of the closed loop structure and the circuit board connection at a second position of the closed loop structure, and the closed loop structure and the A clearance area is formed between the boards.

Optionally, the antenna further includes: an auxiliary portion, wherein the auxiliary portion includes at least one auxiliary branch, and a connection of the closed loop structure and the auxiliary branch is disposed at a third position of the closed loop structure Part, wherein the auxiliary branch is a material that can be used as an antenna.

Optionally, a clearance area is provided at the connection of the feeding point and the circuit board.

Optionally, the terminal device has a closed metal frame, and the closed ring structure is the metal frame.

Optionally, the terminal device has a closed loop, the closed loop being a material that can be used as an antenna, and the closed loop structure is the closed loop.

Optionally, the closed loop structure is disposed between the edge of the terminal device and the circuit board.

Optionally, a clearance area is provided around the auxiliary branch.

Optionally, the auxiliary portion includes at least a first auxiliary branch and a second auxiliary branch, and a third portion of the closed loop structure is provided with a connecting portion of the closed loop structure and the first auxiliary branch, wherein The first auxiliary branch is a material that can be used as an antenna;

A connecting portion of the closed loop structure and the second auxiliary branch is disposed at a fourth position of the closed loop structure, wherein the second auxiliary branch is a material that can be used as an antenna.

Optionally, the second location is between the first location and the third location.

The embodiment of the present invention further provides a terminal device, where the terminal device includes the built-in antenna of the terminal device provided by the embodiment of the present invention.

One of the above technical solutions has the following advantages or benefits:

In the embodiment of the present invention, since the antenna includes a main body portion, and the main body portion includes a closed loop structure, a ground feed of the closed loop structure and the circuit board connection of the terminal device is disposed at a first position of the closed loop structure. And a feed point at which the closed loop structure and the circuit board are connected are disposed at a second position of the closed loop structure, and a clear area is formed between the closed loop structure and the circuit board. Compared with the antenna of the open-loop structure in the related art, the embodiment of the present invention can reduce the wiring space of the antenna.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic structural diagram of a built-in antenna of a terminal device according to an embodiment of the present invention;

2 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present invention;

3 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present invention;

4 is a schematic diagram of a simulation model of an antenna according to an embodiment of the present invention;

FIG. 5(1) is a schematic diagram of a simulation result provided by an embodiment of the present invention;

FIG. 5(2) is a schematic diagram of another simulation result provided by an embodiment of the present invention; FIG.

FIG. 5(3) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present disclosure;

7 is a schematic diagram of a simulation model of another antenna according to an embodiment of the present invention;

FIG. 8(1) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 8(2) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a simulation model of another antenna according to an embodiment of the present invention; FIG.

11 is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram of a simulation model of another antenna according to an embodiment of the present invention; FIG.

14 is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of another built-in antenna of a terminal device according to an embodiment of the present disclosure;

16 is a schematic diagram of a simulation model of another antenna according to an embodiment of the present invention;

17(1) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

17(2) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 18(1) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 18(2) is a schematic diagram of another simulation result provided by an embodiment of the present invention;

FIG. 19 is a schematic structural diagram of another internal antenna of a terminal device according to an embodiment of the present disclosure;

20 is a schematic diagram of a simulation model of another antenna according to an embodiment of the present invention;

FIG. 21 is a schematic diagram of another simulation result provided by an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

As shown in FIG. 1 , an embodiment of the present invention provides a schematic structural diagram of a built-in antenna of a terminal device, as shown in FIG. 1 , including: a main body portion, wherein the main body portion includes a closed loop structure 111, and the closed loop structure is The first position of the 111 is provided with the closed loop structure 111 and the ground feed point 112 connected to the circuit board of the terminal device, and the closed loop structure 111 and the second position are disposed at the second position of the closed loop structure 111 A feed point 113 to which the board is connected is formed, and a clear area 114 is formed between the closed loop structure 111 and the circuit board.

For example, the closed loop structure 111 is used to surround the circuit board in FIG. 1 . For example, the closed loop structure 111 may be located on one side of the circuit board, which is not limited in this embodiment of the present invention. In addition, in the embodiment of the present invention, the closed loop structure 111 may be a closed loop of any shape, that is, in the embodiment of the present invention, the shape of the closed loop structure 111 is not limited as long as it is a closed loop. In addition, the material of the closed loop structure 111 may be any material that can be used as an antenna, for example, a metal material or an artificial electromagnetic material, and any material that can be used as an antenna, which is not limited in the embodiment of the present invention.

The closed loop structure 111 described above can be understood as the closed loop structure 111 being a closed loop. The ground feed point 112 in which the closed loop structure 111 and the circuit board of the terminal device are connected in the first position of the closed loop structure 111 can be understood as the closed loop structure 111 passing through the ground feed point in the first position. 112 is connected to the board. In addition, the above-mentioned ground feed point 112 can be understood as a ground point. Similarly, in the second position of the closed loop structure 111, the closed loop structure 111 and the feeding point 113 connected to the circuit board are disposed, and the closed loop structure 111 passes through the feeding point 113 and the circuit in the second position. Board connection. In addition, the above-mentioned clearance area 114 can be understood as a non-metallic area or a non-conductive area, that is, the area is non-metallic or non-conductive.

In addition, in the embodiment of the present invention, the first position and the second position are not limited, that is, the first position and the second position may be any two different positions on the closed loop structure 111.

Additionally, in embodiments of the invention, the resonant frequency can be varied by varying the relative position between the first position and the second position and/or increasing the path length of the closed loop of the closed loop structure 111. Specifically, the first position and the second position may be adjusted according to requirements, and the path length of the closed loop of the closed loop structure 111 may be adjusted to change the resonant frequency of the antenna. In addition, the above circuit board may be a PCB board.

As an optional implementation manner, as shown in FIG. 2, the antenna may further include: an auxiliary portion, wherein the auxiliary portion includes at least one auxiliary branch 115, and the third position of the closed ring structure 111 is disposed at a third position. The closed loop structure 111 is connected to the auxiliary branch section 115, wherein the auxiliary branch section 115 is a material that can be used as an antenna.

In this embodiment, a new resonance point can be added to the antenna by adding the auxiliary branch 115. In addition, the resonance of the antenna can also be changed by the auxiliary branch section 115 of different lengths, that is, changing the length of the auxiliary branch section 115. And the third position described above can also be changed to change the resonant frequency of the newly added resonant wave. In addition, in this embodiment, the shape of the auxiliary branch 115 is not limited, for example, the auxiliary branch 115 may have a shape as shown in FIG. 2, or the auxiliary branch 115 may be "L" or a circular arc, etc., the present invention The embodiment is not limited. In addition, in the embodiment of the present invention, the number of the auxiliary branches 115 included in the antenna is not limited, that is, in the embodiment of the present invention, one or more auxiliary branches 115 may be included. For example, the auxiliary portion includes at least a first auxiliary branch and a second auxiliary branch, and a third portion of the closed loop structure is provided with a connecting portion of the closed loop structure and the first auxiliary branch, wherein The first auxiliary branch is a material that can be used as an antenna; a fourth portion of the closed ring structure is provided with a connecting portion of the closed ring structure and the second auxiliary branch, wherein the second auxiliary branch It is a material that can be used as an antenna.

As an alternative embodiment, a clearance area 117 may be provided around the auxiliary branch section 115. The size of the clearance area 117 can be changed as needed, which is not limited in this embodiment of the present invention.

As an alternative embodiment, a clearance area 118 may be provided at the junction of the feed point 112 and the circuit board. The size and shape of the clearance area are not limited in this embodiment. Of course, in this embodiment, the same can be realized when the antenna does not have the above auxiliary portion.

In an optional embodiment, the second position is between the first position and the third position. For example: as shown in Figure 2.

As an optional implementation manner, for example, as shown in FIG. 3, the terminal device has a closed metal frame, and the closed ring structure 111 is the metal frame.

In this embodiment, the closed metal frame of the terminal device can be used as the antenna, thereby saving space in structure and being advantageously used for miniaturization of the terminal device.

In the embodiment of the present invention, the terminal device may be a mobile phone, a tablet personal computer, a laptop computer, or a personal digital assistant. , referred to as PDA), Mobile Internet Device (MID) or smart watches.

In addition, in this embodiment, the resonant frequency of the antenna can be changed by different positional relationships between the first position and the second position, so that the antenna can be applied to different scenes or regions. For example, taking a mobile phone as an example, Figure 4 shows the HFSS simulation model of the metal frame of the mobile phone as an antenna. In the model, the metal frame is rectangular, the length of the metal frame is long × width = 145 mm × 70 mm, and the position of the feeding point 113 is fixed, that is, the second position is fixed, and the position of the ground feeding point 112 is changed, that is, the first position is changed. As shown in FIG. 4, the position of the original ground feed point 112 is a, the corresponding HFSS result picture is FIG. 5 (2), the local feed point 112 is located close to the feed point 113, and at the position b, the simulation result is as shown in FIG. As shown in Fig. 5(1), the local feed point 112 is away from the feed point 113. At the position c, the simulation result is shown in Fig. 5(3):

It can be seen from the above result graph that the waveform of FIG. 5(1) when the local feed point 112 is close to the feed point 113 and the waveform of FIG. 5(2) of the original position can be seen, and the resonance waves 1, 2, and 3 are all directions. Low frequency offset. When the local feed point 112 is away from the feed point 113, the waveform diagram 5 (3) and the original position waveform diagram 5 (2) can be seen that the resonance waves 1, 2, 3 are all shifted toward the high frequency.

In addition, in this embodiment, the auxiliary branch segments 115 can also be implemented together, for example: As shown in FIG. 6, the material 111 that can be used as an antenna is also connected with an auxiliary branch 115. This can change or adjust the resonant frequency of the newly added resonant wave by the different lengths of the auxiliary branches 115 and the different positions of the third positions described above. For example, taking a mobile phone as an example, Figure 7 shows the HFSS simulation model of the metal frame + auxiliary part of the mobile phone as an antenna. In the model, the metal frame is rectangular, the length of the metal frame is long × width = 145 mm × 70 mm, the position of the feeding point 113 and the ground feeding point 112, and the connection position of the metal ring and the auxiliary branch are fixed, that is, the first position, the first The two positions and the third position are fixed, and the length of the auxiliary branch 115 is changed. As shown in Fig. 7, the length of the auxiliary branch 115 is M, and changing the length of M can change the resonance frequency. When the values of M are 10 mm and 25 mm, respectively, the simulation results are shown in Fig. 8 (1) and Fig. 8 (2). It can be known that when the value side of M is long, the resonance frequency is shifted to the low frequency.

As an alternative embodiment, as shown in FIG. 9, the terminal device has a closed loop, which is a material that can be used as an antenna, and the closed loop structure 111 is the closed loop. For example, the closed loop is a ring of a metal ring or other material that can be used as an antenna, and the like.

In this embodiment, it is possible to realize the use of the closed loop of the terminal device as an antenna, thereby saving space in structure and being advantageous for miniaturization of the terminal device.

In the embodiment of the present invention, the terminal device is a smart watch. However, the terminal device in the embodiment of the present invention may also be a wearable device such as a smart wristband.

In this embodiment, the terminal device is exemplified as a smart watch. For example, the HFSS modeling is as shown in FIG. 10: changing the relative position of the feeding point 113 and the ground feeding point 112 in the figure can change the resonant frequency of the Xie Zhen wave. Keeping the position of the feed point 113 unchanged, only changing the position of the feed point 112. Let the parameter of changing the relative position of the feed point 113 and the ground feed point 112 be L, and change the magnitude of L to change the resonance frequency. The HFSS simulation result of the conclusion is shown in FIG.

In the result of Fig. 11, it can be seen from L = 15 mm and L = 5 mm that the resonance frequency is shifted to the low frequency when the relative positions of the feed point 113 and the ground feed point 112 become long.

In addition, in this embodiment, the auxiliary branch segments 115 can also be implemented together, for example: As shown at 12, the closed loop structure 111 is also coupled with an auxiliary branch 115. This can change or adjust the resonant frequency of the newly added resonant wave by the different lengths of the auxiliary branches 115 and the different positions of the third positions described above. For example, taking a smart watch as an example, the HFSS modeling is as shown in FIG. 13: changing the position of the ground feed point 112 and the feed point 113 can change the resonance frequency of the resonance point. The auxiliary branch section 115 added to the auxiliary portion is used to add a new resonance point, and the resonance of the antenna is changed by changing the length of the branch. The position of the feed point 113 and the position of the ground feed point 112 are maintained. Changing the length of the auxiliary branch 115 can change the resonant frequency of the resonant wave. The parameter for changing the length of the auxiliary branch 115 is L1. Changing the magnitude of L1 can change the resonant frequency. The HFSS simulation result of the conclusion is shown in Figure 14: It can be seen that L1 = 52 mm and L = 68 mm, the resonance frequency shifts to the low frequency when the length of the auxiliary branch 115 becomes long.

As an alternative embodiment, as shown in FIG. 15, a closed loop structure 111 may be disposed between the edge of the terminal device and the circuit board.

In this embodiment, the closed loop structure 111 may be a wire body of the antenna. In addition, in this embodiment, it can be applied to the case where the terminal device does not have a closed metal frame, and the metal ring of the closed ring does not exist. Of course, it is not excluded that in the embodiment, it can be applied to the terminal device having a closed metal frame or a closed loop scene.

Of course, the above FIG. 15 is only an example. For example, the closed loop structure 111 may also be disposed on the side of the circuit board.

Also, in this embodiment, different resonant frequencies can be achieved by different first and second positions to be applied to different regions or regions. For example, the modeling diagram of HFSS is shown in FIG. 16, d is the length parameter of the closed loop structure 111, and d1 is the distance between the feed point 113 and the ground feed point 112. For the sake of illustration, the initial state takes d=47 mm and d1=5 mm. When the length parameter of the closed loop structure 111 is constant, d=47 mm is unchanged, and the relative position d1 of the feed point 113 and the ground feed point 112 is changed, and the bandwidth and frequency of the resonance wave can be changed. The simulation result of HFSS is shown in Fig. 17 (1) and Fig. 17 (2): When d1 < 5 mm (the position of feed point 113 and ground feed point 112 become close): the simulation result is shown in Fig. 17 (1) As can be seen from the figure, when the feed point 113 is close, the resonance does not move to the low frequency, but at the original resonance point. The upper waveform is deepened and the bandwidth is narrowed.

When d1>5 mm (the position of the feed point 113 and the ground feed point 112 becomes far), the four curves corresponding to d1=12 mm, d1=22 mm, d1=30 mm, and d1=32 mm are shown in Fig. 17 (2). It can be seen from the above four that as the distance between the feeding points 113 increases, the waveform of the high-frequency resonance point shifts to a high frequency, and when a certain distance is reached, the resonance point disappears in the range of 0.5G-3G.

In addition, when d<47mm, the simulation result of HFSS is as shown in Fig. 18(1), and it can be seen from the curve corresponding to d=46.5mm, d=43.5mm and d=41.5mm in Fig. 18(1). When the size of the metal structure 111 is reduced, the resonance point of 0.8 G and the resonance point of 1.85 G and 2.5 G are shifted toward the high frequency as the ring is reduced.

When d>47mm, the simulation results of HFSS are shown in Fig. 18(2). It can be seen from the curves corresponding to d=55mm, d=53.5mm, d=50mm and d=47mm in Fig. 18(2). When the size of the ring increases, the resonance point of 0.8G and the resonance point of 1.85G and 2.5G shift toward the low frequency as the ring increases.

In addition, in this embodiment, the auxiliary branch segments 115 may also be implemented together. For example, as shown in FIG. 19, the closed ring structure 111 is also connected with the auxiliary branch segments 115. This can change or adjust the resonant frequency of the newly added resonant wave by the different lengths of the auxiliary branches 115 and the different positions of the third positions described above. Additionally, in this embodiment, the clearance area 118 may be within the clearance area 114. In this embodiment, adjusting the size of the closed loop structure 111 and the relative position of the feed point 112 and the feed point 113 and the length of the auxiliary branch 115 can change the resonant frequency of the resonant wave. For example, the modeling diagram of HFSS is as shown in FIG. 20, d is a parameter of the size of the closed loop structure 111, d1 is the distance of the ground feed point 112 and the feed point 113, and ch is the length parameter of the auxiliary branch section 115. Changing the length ch of the branch, the parameter d which maintains the size of the closed loop structure 111 does not change and the distance d1 of the ground feed point 112 and the feed point 113 does not change. The simulation result of HFSS is shown in Fig. 21. It can be seen from the corresponding curves of ch=15mm and ch=22mm that adjusting the length of the auxiliary branch 115 can change the resonant frequency of the antenna, and the resonant frequency of the auxiliary branch 115 is long. Phase low frequency offset.

In the embodiment of the present invention, since the antenna includes a main body portion, the main body portion includes a closed loop a structure in which a closed loop structure and a ground feed point of a circuit board connection of the terminal device are disposed at a first position of the closed loop structure, and the closed loop structure and the second position of the closed loop structure are disposed The feeding point of the circuit board is connected, and a clear space is formed between the closed ring structure and the circuit board. Compared with the antenna of the open-loop structure in the prior art, the embodiment of the present invention can reduce the wiring space of the antenna.

In addition, in the embodiment of the present invention, the terminal device includes the built-in antenna of the terminal device according to any embodiment provided by the embodiment of the present invention.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the built-in antenna and the terminal device of the terminal device provided by the embodiment of the present invention have the following beneficial effects: in the embodiment of the present invention, since the antenna includes a main body portion, and the main body portion includes a closed loop structure, the closed a first position of the ring structure is provided with a ground feed point of the closed loop structure and a circuit board connection of the terminal device, and the closed loop structure and the circuit board are disposed at a second position of the closed loop structure A connected feed point, and a clear area is formed between the closed loop structure and the circuit board. Compared with the antenna of the open-loop structure in the related art, the embodiment of the present invention can reduce the wiring space of the antenna.

Claims

A terminal device built-in antenna includes: a main body portion, wherein the main body portion includes a closed loop structure, and the closed loop structure and the circuit board connection of the terminal device are disposed at a first position of the closed loop structure a ground feed point, and a feed point of the closed loop structure and the circuit board connection are disposed at a second position of the closed loop structure, and a clear space is formed between the closed loop structure and the circuit board.
The antenna according to claim 1, wherein said antenna further comprises: an auxiliary portion, wherein said auxiliary portion includes at least one auxiliary branch, and said closed loop structure is disposed at a third position of said closed loop structure The connecting portion of the auxiliary branch joint, wherein the auxiliary branch is a material that can be used as an antenna.
The antenna according to claim 1 or 2, wherein a clearance area is provided at a junction of said feed point and said circuit board.
The antenna according to claim 1 or 2, wherein the terminal device has a closed metal frame, and the closed ring structure is the metal frame.
The antenna according to claim 1 or 2, wherein the terminal device has a closed loop, the closed loop is a material usable as an antenna, and the closed loop structure is the closed loop.
The antenna according to claim 1 or 2, wherein said closed loop structure is disposed between said terminal device edge and said circuit board.
The antenna according to claim 2, wherein a clearance area is provided around the auxiliary branch.
The antenna according to claim 2, wherein said auxiliary portion includes at least a first auxiliary branch and a second auxiliary branch, and said closed ring structure and said first auxiliary are disposed at a third position of said closed loop structure a connecting portion connected to the branch, wherein the first auxiliary branch is a material that can be used as an antenna;

A connecting portion of the closed loop structure and the second auxiliary branch is disposed at a fourth position of the closed loop structure, wherein the second auxiliary branch is a material that can be used as an antenna.
The antenna of claim 2 wherein said second position is between said first position and said third position.
A terminal device comprising the built-in antenna of the terminal device according to any one of claims 1-9.