WO2017008387A1

WO2017008387A1 - Antenna and terminal

Info

Publication number: WO2017008387A1
Application number: PCT/CN2015/089274
Authority: WO
Inventors: 刘希瑞
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-15
Filing date: 2015-09-09
Publication date: 2017-01-19
Also published as: CN204885439U

Abstract

Disclosed are an antenna and a terminal provided with the antenna. The antenna comprises: a PCB mainboard, a metal plate connected to the ground of the PCB mainboard and a connecting column for fixing the metal plate and the PCB mainboard, wherein a feeding point of the PCB mainboard is connected to the connecting column via a first wiring branch, and a first grounding point of the PCB mainboard is connected to the connecting column via a second wiring branch; and a loop is formed after the feeding point and the grounding point are connected to the metal plate by the first wiring branch, the second wiring branch and the connecting column.

Description

Antenna and terminal

Technical field

The utility model relates to the field of communications, in particular to an antenna and a terminal.

Background technique

In the process of implementing the technical solutions of the embodiments of the present application, at least the following technical problems exist in the related technologies:

Antennas are important components in wireless communication equipment. In the fierce competition of terminals, saving layout space, low cost and attractive diversified shape design have become important tasks in terminal design. In order to ensure the performance of the antenna, it is necessary to leave enough space for the antenna during the design, so that both the structure and the cost have to give concessions. And in the existing compact layout environment, especially the diversity antenna and the Global Position System (GPS)/Wireless Fidelity (WIFI)/Bluetooth antenna, it is difficult to provide sufficient space requirements for its performance. Specifically, an antenna in the form of a Flexible Printed Circuit (FPC) considers other factors such as lifting, and the utilization of the effective wiring area is not high, requiring a higher space requirement; Laser Direct Structuring (LDS) Formal R&D costs are too high, and there is a potential conflict with structural design conflicts.

Therefore, there is a need for an antenna that can save space and make full use of existing terminal structural components.

Utility model content

In view of this, embodiments of the present invention are directed to providing an antenna that can save space and can be implemented by utilizing existing terminal structural components.

The technical solution of the embodiment of the present invention is implemented as follows:

The embodiment of the present invention provides an antenna, the antenna includes: a PCB main board, a metal board connected to the ground of the PCB main board, and a connecting post for fixing the metal board and the PCB main board; a feeding point of the PCB main board is connected to the connecting post through a first wiring branch, and a first feeding point of the PCB main board is connected to the connecting post through a second wiring branch; the feeding point and the The first feed point forms a loopback after the first wiring branch, the second wiring branch, and the connecting post are connected to the metal plate.

In the above solution, the connecting post includes a first connecting post and a second connecting post; the feeding point is connected to the first connecting post through a first wiring branch; the first feeding point passes the second connecting point A wiring branch is connected to the second connection post.

In the above solution, the connecting post includes a screw and a screw column matched with the screw; the first wiring branch and the second wiring branch are respectively connected to the screw.

In the above aspect, the first wiring branch and the second wiring branch are respectively connected to the screw through the connecting portion.

In the above solution, the metal plate is a metal middle frame of the terminal.

In the above solution, the feeding point is connected with a matching circuit and a tuning circuit.

In the above solution, a parasitic branch is disposed in a clear area of the PCB main board opposite to the metal board, and the parasitic branch is connected to a second feed point on the PCB main board.

The embodiment of the present invention further provides a terminal, and the terminal is provided with the antenna according to the embodiment of the present invention.

In the above solution, the outer casing of the terminal is a non-metallic outer casing.

In the above solution, the outer casing of the terminal is a metal outer casing, and the antenna is connected to the metal outer casing through a connecting portion.

The antenna of the embodiment of the present invention includes: a PCB main board, a metal plate connected to the ground of the PCB main board, and a connecting post for fixing the metal plate and the PCB main board; wherein, the feeding point of the PCB main board Connecting to the connecting post through a first wiring branch, the PCB motherboard a feeding point connected to the connecting post through a second wiring branch; the feeding point and the feeding point passing through the first wiring branch, the second wiring branch, and the connecting post and the metal plate After the connection, a loop is formed. The antenna provided by the embodiment of the present invention utilizes the existing terminal structure to save the cost while ensuring the performance of the antenna, and brings more possibilities for structural design.

DRAWINGS

1 is a schematic structural view of an antenna according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of another antenna according to Embodiment 1 of the present invention;

3 is a schematic structural view of an antenna according to Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of another antenna according to Embodiment 2 of the present invention.

DESCRIPTION OF REFERENCE NUMERALS: 11, PCB main board; 111, feed point; 112, first feed point; 113, second feed point; 12, metal plate; 13, connecting post; 13a, first connecting post; 13b, Two connecting columns; 131, screws; 132, screw posts; 14, connecting portions; 15, parasitic branches.

detailed description

The implementation of the technical solution will be further described in detail below with reference to the accompanying drawings.

An embodiment of the present invention provides an antenna. As shown in FIG. 1 , the antenna includes: a PCB main board 11 , a metal board 12 connected to the ground of the PCB main board 11 , and a fixing of the metal board 12 and the PCB main board. a connecting post 13 of the PCB; wherein the feeding point 111 of the PCB main board 11 is connected to the connecting post 13 through the first wiring branch, and the first feeding point 112 of the PCB main board 11 is connected to the connecting post 13 through the second wiring branch The feeding point 111 and the first feeding point 112 are connected to the metal plate 12 through the first wiring branch, the second wiring branch, and the connecting post 113 to form a loop.

As shown in FIG. 2, the connecting post 13 includes a screw 131 and a screw post 132 matched with the screw 131; the screw post 132 is connected to the metal plate 12, and the first wiring branch and the second wiring branch are respectively connected to the screw 131. The first wiring branch and the second wiring branch may pass through the connecting portion 14 Connected to the screw 131. The first wiring branch and the second wiring branch may also be connected to the screw 131 by direct contact.

Here, the metal plate 12 can be a metal middle frame of the mobile phone. Specifically, the metal middle frame can be other conductive metal sheets such as a metal steel sheet or an aluminum sheet.

The feeding point 111 is connected with a matching circuit and a tuning circuit, and a parasitic branch 15 is disposed in the clearance area of the PCB main board 11 with respect to the metal plate 12, wherein the parasitic branch 15 is connected to the second feeding point 113. Here, the first feed point 112 and the second feed point 113 are both different feed points disposed on the PCB main board 11.

As shown in FIG. 2, when the connection post 13 connected to the feed point 111 and the first feed point 112 is one, the first wiring branch between the feed point 111 and the connection post 13 is connected to the first feed point 112. The second wiring branch between the pillars 13 may be a direct connection. At this time, the overall length of the wiring branch between the feeding point 111 and the first feeding point 112 and the connecting post 13 is L, and the L is used as the overall length of the antenna to achieve low frequency coupling of the antenna, specifically by adjusting the length of the L to make the antenna The frequency reaches the desired low frequency. The width W and the overall width D between the first wiring branch and the second wiring branch between the feeding point 111 and the first feeding point 112 and the connecting post 13 can be used to achieve high frequency coupling of the antenna, specifically, by adjusting W And the size of D makes the frequency of the antenna reach the required high frequency frequency.

Further, when the performance of the antenna does not meet the demand, the performance of the antenna can be improved by the tuning circuit and the matching circuit connected to the feeding point 111 and the parasitic branch 15 of the PCB main board 11 with respect to the clearance area of the metal plate 12. Specifically, the low frequency coupling is optimized by the tuning circuit and the matching circuit connected to the feed point 111, and the high frequency coupling is optimized by the parasitic branch 15 connected to the second feed point 113. The specific optimization process can be implemented by the prior art, and the present invention does not specifically limit this.

Embodiment 2

It should be noted that, in the antenna provided by the present invention, the connecting post 13 may be one or Two, FIG. 1 and FIG. 2 are illustrated by one connecting post, and FIG. 3 and FIG. 4 are illustrated by two connecting columns. For the case of two connecting columns, specifically, FIG. 3, the connecting post 13 includes the first connection. The column 13a and the second connecting post 13b; the feeding point 111 is connected to the first connecting post 13a through the first wiring branch; the first feeding point 112 is connected to the second connecting post 13b through the second wiring branch.

As shown in FIG. 3, in the antenna provided in this embodiment, the connecting post 13 includes a first connecting post 13a and a second connecting post 13b, and the feeding point 111 passes through the first wiring branch and the first connecting post 13a. The first feed point 112 is connected to the second connection post 13b through the second wiring branch. The first wiring branch and the second wiring branch are not directly connected, but are indirectly connected through the first connecting post 13a and the second connecting post 13b, thereby respectively leading the first wiring branch at the feeding point 111 and the first feeding point 112, The two wiring branches, the respective connected screws, and the LOOP loop are formed by connecting the screw positioning post to the grounded steel piece below. Here, the screw positioning column is a screw column, and the grounding steel piece is the metal plate 12 in the first embodiment.

In the antenna shown in FIG. 4, the antenna low frequency coupling can be realized by controlling the overall wiring length L on the PCB main board; the high frequency coupling is controlled by controlling the wiring width W on the PCB main board and the distance D from the side of the PCB main board. .

In actual use, in the low frequency band, especially when the diversity has dual low frequency or ultra low frequency, and the physical structure cannot meet the low frequency length and the bandwidth requirement, the switching of the low frequency coupling frequency point is controlled by the switch through the increase of the matching circuit and the tuning circuit. The antenna's low frequency performance is further guaranteed.

As shown in FIG. 4, a parasitic branch 15 is added to the clearance area of the PCB main board 11 with respect to the metal plate 12. Here, in the embodiment, an L-shaped branch is taken as an example, and in actual use, the parasitic The distribution of branches is not specifically limited. The parasitic branch can be a high frequency coupled parasitic branch, which further ensures the high frequency performance of the antenna.

It should be noted that, for the antenna provided by the utility model, the existing terminal structure can save the cost while ensuring the performance of the antenna, and brings more possibilities for the structural design. ,

1. It only needs to adjust the antenna matching and PCB wiring, and does not need to design the antenna separately, which reduces the research and development cost of the antenna. 2. Compared with the traditional FPC form, the antenna form performance provided by the utility model is more in the same structural environment. Guarantee; 3. Compared with the traditional LDS form, the antenna form provided by the utility model saves cost, and brings more design space to the structural design.

In actual use, the terminal provided with the antenna provided in this embodiment is analyzed, specifically: the spacing between the two positioning screw columns and the clearance area on the PCB main board, and further, analyzing the frequency band requirement of the antenna to determine the feeding point of the antenna. The number and its position on the PCB main board, in particular, the commonly used PIFA routing form requires two feed points: the feed point and the first feed point. If the frequency band needs more, then a feed point needs to be added as the parasitic antenna to increase the coupling. To meet the frequency band requirements, the feed points determined at this time include the feed point and the two feed points. After determining the quantity and position, adjust the wiring antenna width W, length L, overall width D or the distance D of the wiring from the PCB main board frame on the PCB main board to make the antenna resonate at the required frequency point. When performance optimization is required, the tuning of the tuning circuit and the matching circuit optimizes the antenna performance to meet the demand. For the antenna provided by the present invention, mass production can be performed by confirming the wiring size of the antenna.

It should be noted that, in the antenna provided by the present invention, the specific wiring manner of the first wiring branch and the second wiring branch is not specifically limited on the premise that the wiring size satisfies the coupling performance.

Embodiment 3

The utility model also provides a terminal, which is provided with the antenna provided above. The outer casing of the terminal can be a non-metallic outer casing or a metal outer casing. When the outer casing of the terminal is a metal outer casing, the antenna is connected to the metal outer casing through a connecting portion.

When the outer casing is a non-metallic outer casing, the antenna in the terminal is used for the function of radiation and tuning; when the outer casing is a metal outer casing, the antenna in the terminal can only perform the tuning function, and the radiation function is completed by the metal casing.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

The antenna of the embodiment of the present invention includes: a PCB main board, a metal plate connected to the ground of the PCB main board, and a connecting post for fixing the metal plate and the PCB main board; wherein, the feeding point of the PCB main board Connected to the connecting post through a first wiring branch, the feeding point of the PCB main board is connected to the connecting post through a second wiring branch; the feeding point and the feeding point pass the first wiring branch The second wiring branch and the connecting post are connected to the metal plate to form a loop. The antenna provided by the embodiment of the present invention utilizes the existing terminal structure to save the cost while ensuring the performance of the antenna, and brings more possibilities for structural design.

Claims

An antenna comprising: a PCB main board, a metal plate connected to the ground of the PCB main board; and a connecting post for fixing the metal plate and the PCB main board; wherein the feeding point of the PCB main board Connected to the connecting post through a first wiring branch, a first feed point of the PCB main board is connected to the connecting post through a second wiring branch; the feeding point and the first feeding point pass the The first wiring branch, the second wiring branch, and the connecting post are connected to the metal plate to form a loop.
The antenna according to claim 1, wherein the connecting post comprises a first connecting post and a second connecting post; the feeding point is connected to the first connecting post by a first wiring branch; the first The feed point is connected to the second connection post through the second wiring branch.
The antenna according to claim 1 or 2, wherein the connecting post comprises a screw and a screw post matched with the screw; and the first wiring branch and the second wiring branch are respectively connected to the screw.
The antenna according to claim 3, wherein the first wiring branch and the second wiring branch are respectively connected to the screw through an engaging portion.
The antenna according to claim 1 or 2, wherein the metal plate is a metal middle frame of the terminal.
The antenna according to claim 1 or 2, wherein said feed point is connected to a matching circuit and a tuning circuit.
The antenna according to claim 1 or 2, wherein a parasitic branch is disposed in a clearance area of the PCB main board opposite to the metal board, and the parasitic branch is connected to a second feed point on the PCB main board.
A terminal provided with the antenna according to any one of claims 1-7.
The terminal of claim 8 wherein the outer casing of the terminal is a non-metallic outer casing.
The terminal according to claim 8, wherein the outer casing of the terminal is a metal casing. The antenna is connected to the metal casing through a connection portion.