WO2015192594A1

WO2015192594A1 - Antenna and terminal

Info

Publication number: WO2015192594A1
Application number: PCT/CN2014/091184
Authority: WO
Inventors: 李群
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-06-20
Filing date: 2014-11-14
Publication date: 2015-12-23
Also published as: WO2015192614A1; EP3159963A1; EP3159963A4; CN105281014A; EP3159963B1; CN105281014B

Abstract

Disclosed in the present invention are an antenna and a terminal, used for resolving the problem of traditional antennae occupying a large space in a terminal. The antenna provided in the present invention comprises: the antenna is formed of a support plate within the terminal, or an extended part of the support plate, and a radiator, the support plate being connected to a main plate of the terminal, the extended part of the support plate being arranged to form, with the radiator, a coupling feed, the extended part of the support plate being a part extending beyond the engaging position of the support plate and the terminal housing. The antenna can make full use of the interior space of the terminal, improving space utilisation in the terminal.

Description

Antenna and terminal

Technical field

The present invention relates to the field of mobile communications, and in particular to an antenna and a terminal.

Background technique

An antenna is an indispensable component in a communication system. The performance of an antenna is directly related to the quality of the received and transmitted signals. The size of today's smart terminals is moving toward a thinner and smaller trend, so the size of the built-in antenna of the terminal needs to be smaller and smaller. The traditional PIFA (Planar Inverted-F Antenna) requires the antenna to have a height of at least 7 mm. However, the wider the frequency band that the antenna needs to support, the larger the height and area of the antenna. For a monopole antenna, the antenna is required to have a certain clearance area, and the wider the antenna frequency band, the larger the clearance area of the antenna is required. The conventional antennas are attached to the casing in the form of FPC (Flexible Printed Circuit) or steel sheets, and then connected to the main board through reeds or PIN pins to form a passage, but this method requires a shell. The body structure leaves enough area for the antenna. At the same time, in order to obtain good radiation performance of the antenna, it is necessary to use the housing area as far as possible from the main board to install the antenna, which increases the space occupied by the antenna and causes the terminal size to increase.

Summary of the invention

The technical problem to be solved at least in the embodiments of the present invention is that the conventional antenna occupies a large space of the terminal.

In order to solve the above technical problem, an embodiment of the present invention provides an antenna, including: an antenna is formed by an extension portion of a terminal internal support plate or a support plate, and a radiator, and the support plate is connected to a motherboard of the terminal, and an extension portion of the support plate It is arranged to form a coupling feed with the radiator, and the extension of the support plate or the support plate is a portion thereof beyond the position where the support plate and the final casing are combined.

The antenna further includes another antenna, and the other antenna is disposed on the housing of the terminal.

Wherein, the extension of the support plate is provided with an open cavity, and one side of the open cavity is provided with another cavity, and the radiator is disposed in the cavity of the opening.

Wherein, the cavity of the opening is rectangular.

Wherein, the antenna radiation frequency is energy in a wavelength band of 1710 Mhz to 2200 Mhz.

The extension portion of the support board is connected to the ground feed point of the terminal board, and the radiator is connected to the signal feed point of the terminal board.

Wherein, the support plate is an aluminum-magnesium alloy, a zinc alloy or a stainless steel material.

The extension portion of the support plate or the support plate and the radiator are respectively connected to the ground feed point of the terminal main board and the signal feed point of the terminal main board through the pin needle or the reed.

According to another embodiment of the present invention, there is also provided a terminal comprising any of the antennas described above.

In the embodiment of the present invention, a part of the internal support plate of the terminal or an extension portion of the internal support plate and the radiating body form a coupled feed antenna, which can fully utilize the internal space of the terminal and improve the utilization of the internal space of the terminal.

DRAWINGS

1 is a schematic view showing the layout of a metal support plate according to an embodiment of the present invention in a mobile phone;

2 is a schematic structural diagram of an antenna according to an embodiment of the present invention;

3 is a side view showing the inside of a terminal in which an antenna according to an embodiment of the present invention is mounted;

4 is a diagram showing a return loss generated by using an antenna as a single antenna according to an embodiment of the present invention;

5 is a graph showing an antenna efficiency of an antenna in a frequency range of 1710 MHz to 2160 MHz according to an embodiment of the present invention;

6 is a graph showing an antenna efficiency curve of an antenna in an embodiment of the present invention in a frequency range of 710 MHz to 890 MHz;

7 is a graph showing an antenna efficiency curve in the range of 1710 MHz to 2160 MHz after the antenna of the embodiment of the present invention is combined with an antenna built in the terminal;

FIG. 8 is a graph showing the antenna efficiency in the range of 710 MHz to 890 MHz after the antenna of the embodiment of the present invention is combined with the antenna built in the terminal.

detailed description

In order to solve the problem that the internal space of the antenna occupying terminal is large in the prior art, the present invention provides an antenna and a terminal. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The terminal in this embodiment uses a mobile phone as an example. Generally, the internal structure of the terminal is as shown in FIG. 1 , and the structure of the printed circuit board (PCB) is smaller than the size of the LCD (Liquid Crystal Display). Need to increase the metal support plate to increase the stability of the motherboard and LCD. In order to have a better radiation performance of the antenna, there is generally no metal structure extending under the antenna of the mobile phone. The PCB board and the metal support board generally have a certain spacing, about 1-2 mm. The antenna provided by the embodiment of the present invention A coupling feed antenna (hereinafter referred to as an antenna) is formed by using a support plate and a portion thereof which extends the position where the support plate is combined with the final casing, and a coupling feed antenna can also be formed by using a part of the support plate itself.

2 is a schematic structural view of an antenna according to an embodiment of the present invention.

As shown in FIG. 2, the antenna is composed of the

extension portions

7, 8 of the support plate 2 inside the terminal and the radiator 6, which may be made of an aluminum-magnesium alloy, a zinc alloy or a stainless steel material, and the extension of the support plate 2 is a portion beyond the position 3 of the support plate 2 in combination with the final casing, that is, the shaded portion shown in FIG. 2 is the support plate 2 inside the terminal and the extension portion of the support plate, wherein the radiator 6 can also be extended by the support plate The sheet-like radiator is realized, and it can also be realized by other radiators of different materials from the support plate 2. The support plate 2 is connected to the main board 1 of the terminal, and the extension of the support plate is arranged to form a coupling feed with the radiator 6, forming a coupled feed antenna. The

extension portions

7, 8 of the support plate are connected to the ground feed point 4 of the terminal main board 1, and the radiator 6 is connected to the signal feed point 5 of the main board of the terminal. The radiator 6 is a high-frequency radiator, combined with the extension of the support plate, can radiate energy in the 1710Mhz-2200Mhz band, or can design a resonance that generates higher frequency points as needed, and the

extension portions

7 and 8 of the support plate are mainly It is coupled with the radiator 6 to generate a resonance of a low frequency band, and the wiring manner is not limited to that shown in FIG. 2, and different traces can be designed and formed for the purpose of generating excitation.

It should be noted that the structure of the antenna of the embodiment of the present invention is not limited to the specific structure shown in FIG. 2, and the structure of the antenna may be an antenna of any structure that satisfies the following conditions:

An open cavity is provided by the extension of the support plate inside the terminal, and another cavity is provided on one side of the open cavity, and the radiator is disposed in the cavity of the opening, as shown in FIG. The rectangular shape of the cavity is only one specific embodiment of the antenna described in the embodiment of the present invention.

Fig. 3 is a side elevational view showing the inside of a terminal to which an antenna according to an embodiment of the present invention is mounted. In the figure, the antenna provided by the embodiment of the present invention is further described by taking the terminal as a mobile phone as an example.

The inside of the mobile phone shown in FIG. 3 includes: a PCB board 1 and a metal support board 2. The antenna according to the embodiment may further include another antenna 9 disposed on the housing of the terminal, and the other antenna may be The antenna that comes with the phone. The antenna formed by the

extension portions

7, 8 of the internal support plate of the mobile phone passes through the ground feed point 4, and the signal feed point 5 is connected to the main board. Specifically, the extension portion of the support plate and the radiator 6 are respectively connected to the terminal board through the pin pin or the reed. The ground feed point and the signal feed point are connected. It should be noted that the radiator 6 and the

inner extension portions

7 and 8 of the support plate In the same plane, the specific structure of the radiator 6 and the

support plates

7, 8 is not shown in the test chart shown in FIG. 3 is a position where the metal support plate is combined with the plastic case of the front cover of the mobile phone. The conventional mobile phone structure is composed of the support plate having a length of 3 or a downward extension of 1-2 mm to increase the stability. The support plate is extended in an appropriate amount, and the extension portion is used to form a coupled feed antenna. The antenna is designed by a coupling feeding method to obtain a wider band antenna in a smaller area, but the antenna is at a low frequency. The bandwidth will be narrower and the radiation efficiency is not high enough. Therefore, while meeting the design requirements, the extension of the grounded metal support plate at the bottom of the mobile phone can be as short as possible. Based on this, the design can be added to the casing of the mobile phone. The antenna 9 is sufficient to meet the needs. If the extension of the support plate is extended downward, the design and performance of the antenna 9 will be affected. There will be a coupling effect between the two, and the debugging is difficult. The antenna can be set to generate partial resonance. For high-band resonance, the antenna can be used as a single high-band antenna, which can also be connected to the antenna 9 on the phone case. , generating a resonance of another frequency band, which can be low frequency.

4 is a diagram showing the return loss of the antenna used as a single antenna according to an embodiment of the present invention. It can be seen that the low frequency coverage is somewhat difficult. FIG. 5 is an antenna efficiency of the antenna in the range of 1710 MHz to 2160 MHz in the embodiment of the present invention. The graph, as shown in Figure 5, shows that the high frequency efficiency can basically meet the design needs. FIG. 6 is a graph showing the antenna efficiency of the antenna of the embodiment of the present invention in the range of 710 MHz to 890 MHz. It can be seen from Fig. 6 that the efficiency of the low frequency is not high, the vicinity of 800 MHz is slightly better, the antenna efficiency is about 14%, and the high frequency part is better than 1710-2300 MHz. 7 is a graph showing the antenna efficiency in the range of 1710 MHz to 2160 MHz after the antenna of the embodiment of the present invention is combined with the antenna built in the terminal, and FIG. 8 is a combination of the antenna of the embodiment of the present invention and the antenna provided in the terminal. In the antenna efficiency graph in the range of 710MHZ-890MHZ, it can be seen from Fig. 7 and Fig. 8 that the efficiency of the antenna in the low frequency range is greatly improved.

An embodiment of the present invention further provides a terminal, where the terminal may include any one of the following antennas:

The antenna is composed of an extension portion of the inner support plate of the terminal and a radiator, and the support plate is connected with the main board of the terminal, and the extension portion of the support plate is arranged to form a coupling feeding with the radiator, and the extension portion of the support plate is beyond the support plate and the final shell. The part of the body combined with the position.

The antenna also includes another antenna, and the other antenna is disposed on the housing of the terminal.

The extension of the support plate is provided with an open cavity, and one side of the open cavity is provided with another cavity, the radiator is disposed in the cavity of the opening, and the opening cavity and the radiation disposed in the open cavity The antenna of the body. The cavity of the opening may also be rectangular.

The antenna included in the terminal radiates energy in the range of 1710 Mhz to 2200 Mhz.

The extension of the support plate can be connected to the ground feed point of the terminal board, and the radiator is connected to the signal feed point of the terminal board.

The support plate may be an aluminum-magnesium alloy, a zinc alloy or a stainless steel material.

The extension of the support plate and the radiator may be connected to the ground feed point of the terminal board and the signal feed point of the terminal board through a pin or a reed, respectively.

The antenna provided by the embodiment of the invention not only can fully utilize the space inside the terminal, but also enables the user to ensure that the antenna is far away from the human body when using the terminal, and can reduce the SAR (Specific Absorption Rate) of the antenna and reduce When the terminal is in the state of use, the loss of the antenna efficiency can be improved in the overall efficiency of the antenna when the antenna provided by the embodiment of the present invention is combined with the self-contained antenna of the terminal.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Industrial applicability

As described above, an antenna and a terminal provided by the embodiments of the present invention have the following beneficial effects: the terminal internal space can be fully utilized by using a part of the internal support plate of the terminal or an extension of the internal support plate and the radiator to form a coupled feed antenna. , improve the utilization of the internal space of the terminal.

Claims

An antenna comprising:

The antenna is composed of an extension portion of the terminal internal support plate or the support plate and a radiator, and the support plate is connected to the main board of the terminal, and the extension portion of the support plate or the support plate is disposed to be opposite to the radiator A coupling feed is formed, the extension of the support plate being a portion that exceeds the position at which the support plate is coupled to the final housing.
The antenna of claim 1, wherein the antenna further comprises another antenna, the other antenna being disposed on a housing of the terminal.
The antenna according to claim 1, wherein the extension of the support plate or the support plate is provided with an open cavity, and one side of the cavity of the opening is provided with another cavity, the radiator is disposed In the cavity of the opening.
The antenna of claim 1 wherein the opening has a rectangular cavity.
The antenna according to claim 1, wherein the antenna has a radiation frequency of an energy band of 1710 Mhz to 2200 Mhz.
The antenna according to claim 1, wherein

The extension of the support board is connected to a ground feed point of the terminal board, and the radiator is connected to a signal feed point of the terminal board.
The antenna according to claim 1, wherein the support plate is an aluminum-magnesium alloy, a zinc alloy or a stainless steel material.
The antenna according to claim 1, wherein the extension portion of the support plate or the support plate and the radiator are respectively connected to a ground feed point of the terminal main board and a signal feed point of the terminal main board through a pin pin or a reed piece, respectively. .
A terminal comprising: the antenna according to any one of claims 1 to 8.