WO2018219070A1

WO2018219070A1 - Terminal multi-antenna structure and mobile terminal

Info

Publication number: WO2018219070A1
Application number: PCT/CN2018/084251
Authority: WO
Inventors: 陈玉稳; 黄奂衢
Original assignee: 维沃移动通信有限公司
Priority date: 2017-05-31
Filing date: 2018-04-24
Publication date: 2018-12-06
Also published as: CN107257022A; CN107257022B

Abstract

Disclosed are a terminal multi-antenna structure and a mobile terminal. The terminal multi-antenna structure comprises: a metal part, which is provided with at least one break joint, metal structures at the two sides of the break joint respectively correspond to at least one antenna arm; an isolation sheet is provided in the break joint and used for isolating the antenna arms at the two sides, the isolation sheet is electrically conductive, and the isolation sheet is grounded through a preset frequency selection network.

Description

Terminal multi-antenna structure and mobile terminal

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710401380.3, filed on Jan. 31,,,,,,,,,

Technical field

The present disclosure relates to the field of electronic technologies, and more particularly, to a terminal multi-antenna structure and a mobile terminal.

Background technique

As shown in FIG. 1 , in the design of the related art, a mobile terminal with a high proportion of metal or conductive components is used, and a certain structure (two or more) of a slit 100 is often used in the antenna structure of the mobile terminal. The antenna arm 200 has a relatively strong electric field strength when the side of the slit is used as the radiating end of the antenna, so that it is easier to couple to the antenna on the other side of the slit, and the isolation between the multiple antennas is deteriorated.

Summary of the invention

The technical problem to be solved by the present disclosure is to provide an antenna structure and a mobile terminal to solve the problem of poor isolation between multiple antennas of a mobile terminal in the related art.

In a first aspect, a terminal multi-antenna structure is provided, including:

a metal portion, the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively;

A spacer for isolating the antenna arms on both sides is disposed in the slit, the spacer has electrical conductivity, and the spacer is grounded by a predetermined frequency selection network.

In a second aspect, a mobile terminal is provided, comprising: the terminal multi-antenna structure as described above.

The beneficial effects of the above technical solutions of the present disclosure are as follows:

The terminal multi-antenna structure of the embodiment of the present disclosure has a metal portion forming an antenna, the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively; At least one spacer of the antenna arms on both sides, the spacer is electrically conductive, and the spacer is grounded by a predetermined frequency selection network. In this way, by adding spacers in the gap between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. The isolation piece selects the network ground through the preset frequency, so that the isolation piece can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom of antenna performance debugging. Moreover, the break width of the slit to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. The problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the embodiments or the related art description will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present disclosure. For example, other drawings may be obtained from those skilled in the art based on these drawings without paying for inventive labor.

1 is a schematic diagram of a terminal multi-antenna structure in the related art;

2 is a schematic diagram of a multi-antenna structure of the terminal of the present disclosure;

FIG. 3 is a schematic diagram of a specific implementation of a multi-antenna structure of a terminal according to the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

In some embodiments of the present disclosure, as shown in FIGS. 2 and 3, a terminal multi-antenna structure is provided, including:

The metal portion 1, the metal portion 1 is provided with at least one slit 11, the metal structures on both sides of the fracture 11 respectively correspond to at least one antenna arm 12;

A spacer 2 for isolating the two side antenna arms 12 is disposed in the slit 11, the spacer 2 has electrical conductivity, and the spacer 2 is grounded through a predetermined frequency selection network 3.

Here, the spacer 2 is grounded through the preset frequency selection network 3, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the performance of the antenna. .

Optionally, the spacer 2 is a separate structure inserted in the slit, and the spacer 2 may be made of a metal material (but is not limited thereto).

Alternatively, spacers 2 for isolating the antenna arms 12 on both sides may be provided in each of the slits 11 respectively.

Specifically, the metal portion 1 may be an inner metal outline of a metal frame, a metal ring, a metal shell or a non-metal material, or a multi-antenna structure in a non-metallic shape and a contour. Wherein, when a metal casing is used, a part of the metal casing may be laterally hollowed out, divided into an antenna area and a main ground, the antenna area is used as the metal part 1, and a slit 11 is arranged in the longitudinal direction of the antenna area, and is broken into at least two. Antenna arm 12.

In the terminal multi-antenna structure of the embodiment of the present disclosure, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced, the isolation between the multiple antennas is improved, and the optimization is optimized. Antenna performance. The isolation piece 2 is grounded through the preset frequency selection network 3, so that the isolation piece 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the isolation between the multiple antennas and improve the degree of freedom of antenna performance debugging. . Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. The problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved.

For example, by designing the network 3 to design different impedance responses to the antennas on both sides of the fracture 11 by the preset frequency selection network 3, the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna. The state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.

Optionally, based on the deliberate design of different impedance responses on the antennas on both sides of the fracture 11, the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the slit 11 in a centered manner, or can be set in a non-centered manner. In the fracture 11 to achieve better antenna performance.

In particular, when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that presents the open state to the other side is approached to reduce the short circuit condition. The effect on the performance of the side antenna. Moreover, this method tends to reduce the need to increase the width of the slit 11 to ensure the appearance and has better antenna performance.

Further, the metal portion 1 may be the top or bottom of the metal middle frame of the terminal (but is not limited thereto). The antenna arm 12 can be grounded through the feed 5 . The feed 5 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.

As an alternative implementation, referring to FIG. 3, the metal portion 1 of the antenna arm 12 and the slit 11 is provided as a metal middle frame top or bottom. The metal middle frame is broken into three metal structures by providing two slits 11 at the top or bottom of the metal frame, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being grounded through a feed.

Optionally, a slit 2 is disposed in the slit 11 and the spacer 2 is a separate structure inserted in the slit 11 . The spacer 2 is grounded by the preset frequency selection network 3. The preset frequency selection network 3 and the feed 5 are disposed between the metal middle frame and the main ground 4 of the terminal circuit.

At this time, the spacer 2 is grounded through the preset frequency selection network 3, so that the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in antenna performance debugging.

Alternatively, the spacer 2 may be placed in the slit 11 in a centered or uncentered manner to achieve better antenna performance.

At this time, by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in debugging the performance of the antenna.

In the embodiment of the present disclosure, the preset frequency selection network 3 may be combined by one or more of a capacitor, an inductor, a magnetic bead, a resistor, and a filter by series and/or parallel. And the preset frequency selection network 3 is an adjustable frequency selection network or a fixed (ie, non-adjustable) frequency selection network. The specific settings can be made according to actual needs.

Optionally, the preset frequency selection network 3 may be a network having a specific frequency selection function that meets the requirements in combination with the experimental data.

Optionally, the adjustable frequency selection network is a frequency selective network with adjustable parameters, and the fixed frequency selection network is a frequency selection network with non-adjustable parameters.

Alternatively, as already mentioned above, the spacer 2 may be placed in the slit 11 in a centered or uncentered manner to further optimize antenna performance.

In addition, in order to avoid unnecessary resonance and to ensure better isolation, the length of the grounding path of the spacer 2 is optionally smaller than the length of the shortest antenna arm 12 on both sides of the slit 11.

At this time, unnecessary resonance is avoided and a good isolation effect is ensured.

Further, in order to ensure a better appearance effect, optionally, the width of the slit 11 is less than or equal to 100 mm; the total thickness of all the spacers 2 in the slit 11 is less than or equal to 50 mm.

At this time, under the premise of ensuring better isolation, a better appearance effect is ensured.

Further, the cross-sectional area of the spacer 2 may be smaller than the cross-sectional area of the metal structure on both sides of the slit 11 so that the spacer 2 is not covered by the non-metallic material in the slit 11.

In addition, all of the conductive structures described herein, such as spacers, may be made of a metal material (but are not limited thereto).

In summary, the multi-antenna structure of the terminal in the embodiment of the present disclosure utilizes a relatively simple, mature, stable, and low-cost design implementation scheme, which reduces the mutual coupling between multiple antennas on both sides of the fracture 11 and improves the inter-connectivity between the multiple antennas. Isolation optimizes antenna performance. And the above-mentioned spacer 2 is reconnected to the ground through an adjustable or fixed frequency selection network, etc., and a different impedance load environment is generated for the antennas on both sides of the fracture 11 to serve as antennas on both sides of the fracture 11 ( Especially for the isolation antenna 2 for multi-antennas with the same frequency or working frequency, and reducing the mutual coupling between the multiple antennas of the fracture 11 and improving the isolation, the antenna performance is improved. And by further adjusting the position of the spacer 2 in the slit 11, the antenna performance can be optimized again. Moreover, the solution of the present disclosure may have a greater chance of achieving better multi-antenna performance without significantly increasing the width of the appearance slit 11 and thus maintaining a better overall product competitiveness and user experience.

It should be noted that the spirit of the present disclosure is directed to multiple antennas (not limited to the metal ring and the broken joint on the metal shell, as long as it is applicable between multiple antennas, that is, it can also be used for the non-metallic material shape and the multi-antenna structure in the contour. Inserting the above-mentioned spacer 2, and connecting to the ground via a frequency selective network (adjustable or fixed) inductor/capacitor/bead/resistor/filter or its series/parallel mixing The spacer 2 for isolation between the antennas achieves better overall product competitiveness and user experience, so the scope of protection includes, but is not limited to, the above-described embodiments, structural shapes, forms, sizes, positions and numbers thereof.

In some embodiments of the present disclosure, there is also provided a mobile terminal comprising: the terminal multi-antenna structure as described in the above embodiments.

Further, the implementation embodiments of the foregoing terminal multi-antenna structure are applicable to the embodiment of the mobile terminal, and the same technical effects can be achieved.

The mobile terminal of the present disclosure may be, for example, a computer, a tablet computer, a personal digital assistant (PDA), or a vehicle-mounted computer.

In the description of the present disclosure, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", The orientation or positional relationship of the indications "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings. The present disclosure and the simplifications of the disclosure are merely intended to be illustrative, and not to be construed as limiting the scope of the disclosure. In the description of the present disclosure, "a plurality of" means two or more unless otherwise stated.

The above is only the specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the disclosure. It should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosure should be determined by the scope of the claims.

Claims

A terminal multi-antenna structure includes:

a metal portion, the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively;

A spacer for isolating the antenna arms on both sides is disposed in the slit, the spacer has electrical conductivity, and the spacer is grounded by a predetermined frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein the predetermined frequency selection network is combined by one or more of a capacitor, an inductor, a magnetic bead, a resistor and a filter by series and/or parallel connection. to make.
The terminal multi-antenna structure according to claim 1, wherein the preset frequency selection network is an adjustable frequency selection network or a fixed frequency selection network.
The terminal multi-antenna structure according to claim 1, wherein the metal portion is an inner metal outline of a metal frame, a metal ring, a metal case or a non-metal material.
The terminal multi-antenna structure according to claim 4, wherein the metal portion is a top or a bottom of a metal middle frame of the terminal.
The terminal multi-antenna structure of claim 1 wherein said antenna arm is grounded through a feed.
The terminal multi-antenna structure according to claim 1, wherein the spacer is made of a metal material.
The terminal multi-antenna structure of claim 1 wherein the length of the spacer ground path is less than the length of the shortest antenna arm on either side of the break.
The terminal multi-antenna structure according to claim 1, wherein the width of the slit is less than or equal to 100 mm; the total thickness of all of the spacers in the slit is less than or equal to 50 mm.
A mobile terminal comprising: the terminal multi-antenna structure according to any one of claims 1-9.