CN116365220A

CN116365220A - Antenna assembly and terminal equipment

Info

Publication number: CN116365220A
Application number: CN202111616665.1A
Authority: CN
Inventors: 王鹏; 聂凡; 李月亮
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2023-06-30

Abstract

The application provides an antenna assembly and terminal equipment, wherein, the antenna assembly includes: a plastic stent, the plastic stent comprising: a first surface and a second surface opposite to each other; the feeding point is arranged on the plastic bracket; the grounding point is arranged on the plastic bracket; the first radiator is arranged on the first surface, one end of the first radiator is connected with the feed point, and the other end of the first radiator is connected with the grounding point; the second radiator, the second radiator sets up on the second face, and the one end and the feed point of second radiator are connected, and this application compares the advantage that has with the correlation technique and is: the double-sided structural design increases the overall radiation area, effectively improves the overall radiation efficiency of the antenna assembly, and ensures that the antenna assembly can still keep higher performance in a poor antenna clearance environment.

Description

Antenna assembly and terminal equipment

Technical Field

The application relates to the technical field of antennas, in particular to an antenna assembly and terminal equipment.

Background

Along with the rapid updating iteration of the mobile communication technology, people have higher requirements on aspects of appearance, functions and the like of intelligent terminal equipment, and the intelligent terminal equipment is mainly focused on functional diversification and equipment miniaturization. Meanwhile, due to the rapid increase of the antenna components, the integration level of the internal components of the terminal equipment is higher and higher, so that the antenna clearance is smaller and smaller, the radiation efficiency of the antenna components is reduced, and the performance of the antenna components is affected.

Disclosure of Invention

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

Therefore, an object of the present application is to provide an antenna assembly and a terminal device.

To achieve the above object, an antenna assembly according to a first aspect of the present application includes: a plastic stent, the plastic stent comprising: a first surface and a second surface opposite to each other; the first radiator is arranged on the first surface, one end of the first radiator is provided with a first feed point, and the other end of the first radiator is provided with a grounding point; and the second radiator is arranged on the second surface, and one end of the second radiator is provided with a second feed point.

The antenna assembly further comprises: the circuit board is positioned on the second surface side of the plastic bracket, and the first feeding point, the second feeding point and the grounding point are respectively and electrically connected with the circuit board; the shielding cover is arranged on the circuit board, the shielding cover is positioned between the circuit board and the second surface, the orthographic projections of the first feeding point, the grounding point and the shielding cover on the plastic support are not overlapped, the orthographic projections of the second feeding point and the shielding cover on the plastic support are not overlapped, the orthographic projections of at least part of the first radiator and the shielding cover on the plastic support are not overlapped, and the orthographic projections of the second radiator and the shielding cover on the plastic support are not overlapped.

The first feeding point and the second feeding point are respectively overlapped on orthographic projections on the plastic support, a connecting hole is formed in the plastic support, and the first feeding point is connected with the second feeding point through the connecting hole.

The plastic bracket is characterized in that a dispensing area is arranged on the first surface, a first notch is arranged at one end, close to the first feeding point, of the first radiator, and at least part of the second radiator is overlapped with at least part of the first notch on the plastic bracket in an orthographic projection mode.

The second radiator includes: a first portion overlapping orthographic projections of at least a portion of the first notch on the plastic support respectively; and one end of the second part is connected with the first part, and the other end of the second part is connected with the second feeding point.

The first radiator includes: the orthographic projection of at least part of the U-shaped radiation arm and the shielding cover on the plastic bracket are not overlapped, and one end of the U-shaped radiation arm is connected with the grounding point; the front projection of the third part and the shielding cover on the plastic support are not overlapped, one end of the third part is connected with the other end of the U-shaped radiation arm, the other end of the third part is connected with the first feeding point, the first feeding point is close to the grounding point, and the first notch is arranged at one end of the third part far away from the grounding point.

The U-shaped radiation arm comprises: a fourth part, one end of which is connected with the grounding point; the fifth part is positioned at one end of the shielding cover far away from the third part, at least part of the fifth part and orthographic projection of the shielding cover on the plastic bracket are not overlapped, and one end of the fifth part is connected with the other end of the fourth part; and one end of the sixth part is connected with the other end of the fifth part, and the other end of the sixth part is connected with one end, close to the first notch, of the third part.

The width of the fifth portion is greater than the width of the fourth portion and the sixth portion.

The antenna assembly further comprises: the fixing hole is formed in the circuit board, a third notch is formed in the third portion, and orthographic projections of the third portion and the fixing hole on the plastic support are not overlapped through the third notch.

The second part is provided with a second notch, and the second notch enables orthographic projections of the second part and the fixing hole on the plastic bracket to be non-overlapped.

A terminal device according to a second aspect of the present application includes: an antenna assembly as set forth in the first aspect of the present application.

After the technical scheme is adopted, compared with the related technology, the application has the following advantages: the first radiator and the second radiator are respectively arranged on the opposite surfaces of the plastic bracket, so that a double-sided structural design is formed, the overall radiation area is increased, the overall radiation efficiency of the antenna assembly is effectively improved, and the antenna assembly can still keep higher performance in a poor antenna clearance environment.

Additional aspects and advantages of the application 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 application.

Drawings

The foregoing and/or additional aspects and advantages of the present application 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 a terminal device according to a related embodiment of the present application;

fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 3 is a schematic rear view of an antenna assembly according to an embodiment of the present disclosure;

fig. 4 is a front view schematically illustrating an antenna assembly according to an embodiment of the present application;

FIG. 5 is a graph of radiant efficiency versus one embodiment of the present application;

FIG. 6 is a schematic diagram of current simulation in an embodiment of the present application;

FIG. 7 is a schematic diagram of current simulation in an embodiment of the present application;

FIG. 8 is a schematic diagram of current simulation in an embodiment of the present application;

as shown in the figure: 1. the first part, 2, the second part, 3, the third part, 4, the fourth part, 5, the fifth part, 6, the sixth part, 7, the feeding point, 8, the grounding point, 9, the first notch, 10, the second notch, 11, the third notch, 12, the circuit board, 13, the shielding cover, 14, the fixed hole, 15 and the second feeding point.

Detailed Description

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

In order to expand the supported frequency bands, besides the metal frame antenna, an LDS (Laser Direct Structuring ) antenna is usually additionally arranged on the plastic support.

As shown in fig. 1, in the related embodiment of the present invention, the terminal device includes a circuit board 12, a plastic bracket and a first radiator, wherein the plastic bracket is connected with the circuit board 12, one end of the first radiator is provided with a first feeding point 7, the other end of the first radiator is provided with a grounding point 8, the first radiator is arranged on a side surface of the plastic bracket away from the circuit board 12, and the first feeding point 7 and the grounding point 8 are electrically connected with the circuit board 12.

Wherein, the side that the circuit board 12 was kept away from to the plastic support is provided with the point and glues the region, sets up the point and glues on the region to realize the connection of plastic support and terminal equipment casing, but because the integrated level is higher in the terminal equipment, the space is narrow and small, therefore the first radiator partly covers the point when setting up on the plastic support glues the region, causes the adhesion of point glue and first radiator, damages to first radiator easily when leading to the terminal equipment dismouting.

Therefore, the first notch 9 is arranged on the first radiator, and the first radiator avoids the dispensing area through the first notch 9, so that the problem that the first radiator is damaged by dispensing is avoided, but the problem is that the radiation area of the first radiator is reduced due to the arrangement of the first notch 9, so that the radiation efficiency of the first radiator is reduced, and experiments prove that the radiation efficiency of the first radiator is reduced by about 0.5 dB.

Meanwhile, when the antenna clearance environment is poor, the radiation efficiency caused by the design of one side of the LDS antenna is often insufficient.

In order to solve the above technical problems, as shown in fig. 2 to 4, an embodiment of the present application provides an antenna assembly, including a plastic bracket, a first radiator and a second radiator, where the plastic bracket includes: the first face and the second face that the position is opposite, first radiator setting is provided with first feed point 7 on first face, and the other end of first radiator is provided with ground point 8 and connects, and the second radiator setting is on the second face, and the one end of second radiator is provided with second feed point 15 and connects.

It can be understood that the first radiator and the second radiator are respectively arranged on the opposite surfaces of the plastic bracket, so that a double-sided structural design is formed, the overall radiation area is increased, the overall radiation efficiency of the antenna assembly is effectively improved, and the antenna assembly can still keep higher performance in a poor antenna clearance environment.

In some embodiments, the first radiator and the second radiator are LDS antennas, and the working frequency band thereof may be 0.45GHz-6GHz, which are disposed on the plastic support by deposition.

As shown in fig. 2 to 4, in some embodiments, the antenna assembly further includes a circuit board 12 and a shielding case 13, the circuit board 12 is connected to the plastic bracket, and the circuit board 12 is located at the second surface side of the plastic bracket, the first feeding point 7, the second feeding point 15 and the grounding point 8 are respectively electrically connected to the circuit board 12, the shielding case 13 is disposed on the circuit board 12, the shielding case 13 is located between the circuit board 12 and the second surface, the front projections of the first feeding point 7, the grounding point 8 and the shielding case 13 on the plastic bracket respectively do not overlap, the front projections of the second feeding point 15 and the shielding case 13 on the plastic bracket respectively do not overlap, at least part of the first radiator and the front projections of the shielding case 13 on the plastic bracket respectively do not overlap, and the front projections of the second radiator and the shielding case 13 on the plastic bracket respectively do not overlap.

It can be understood that the first feeding point 7, the second feeding point 15, the grounding point 8, the second radiator and at least part of the first radiator avoid the shielding cover 13, so that the current intensity point of the antenna assembly is located in a region with better headroom environment, thereby increasing the effective radiation area of the antenna assembly and improving the overall radiation efficiency of the antenna assembly.

The front projections of the first radiator and the shield 13 on the plastic bracket may not overlap, or the front projections of the first radiator and the shield 13 on the plastic bracket may not overlap.

In some embodiments, the orthographic projections of the first feeding point 7 and the second feeding point 15 on the plastic support are overlapped, and the plastic support is provided with a connecting hole, and the first feeding point 7 and the second feeding point 15 are connected through the connecting hole.

It can be understood that the first and second radiators form an integral structure by the connection of the first and

second feeding points

7 and 15, so that the signal transmission between the circuit board 12 and the first and second radiators is easy, and the radiation efficiency of the antenna assembly is ensured.

In some embodiments, a dispensing area is arranged on the first surface, a first notch 9 avoiding the structural member is arranged at one end, close to the first feeding point 7, of the first radiator, and at least part of the second radiator is overlapped with at least part of the first notch 9 through orthographic projection on the plastic support respectively.

It can be understood that the first radiator and the second radiator form a double-sided structure, and meanwhile, the second radiator effectively compensates the efficiency loss of the first radiator caused by the first notch 9, so that the effective radiation area of the antenna assembly is increased, and the overall radiation efficiency of the antenna assembly is improved.

In some embodiments, the structural member may be a dispensing area.

In some embodiments, the second radiator comprises a first part 1 and a second part 2, at least part of the first part 1 and at least part of the first notch 9 are respectively overlapped on the orthographic projection of the plastic bracket, one end of the second part 2 is connected with the first part 1, and the other end of the second part 2 is connected with the second feeding point 15.

It can be understood that by combining the first portion 1 and the second portion 2, the second radiator is connected with the circuit board 12, and the first notch 9 is made up, so that the implementation of the double-sided structure of the antenna assembly is ensured.

It should be noted that the orthographic projections of the first portion 1 and the first notch 9 on the plastic bracket may be respectively overlapped, or the orthographic projections of the first portion 1 and the first notch 9 on the plastic bracket may be respectively overlapped.

In some embodiments, the second radiator may have an overall length of 4.1mm and a width of 2.1mm.

In some embodiments, the planar direction of the second radiator is parallel to the planar direction of the first radiator. It can be understood that by the arrangement mode, the whole effective radiation area of the antenna assembly is larger and the radiation efficiency is higher after the first radiator and the second radiator are combined.

As shown in fig. 2 to 4, in some embodiments, the first radiator may be a ring structure, and it is understood that the ring structure has higher reliability and better radiation efficiency when facing the interference member such as the shield 13.

In some embodiments, the first radiator includes a U-shaped radiating arm and a third portion 3, at least a portion of the U-shaped radiating arm and the front projection of the shielding cover 13 on the plastic support are not overlapped, one end of the U-shaped radiating arm is connected to the grounding point 8, the front projection of the third portion 3 and the front projection of the shielding cover 13 on the plastic support are not overlapped, one end of the third portion 3 is connected to the other end of the U-shaped radiating arm, the other end of the third portion 3 is connected to the first feeding point 7, the first feeding point 7 is close to the grounding point 8, and the first notch 9 is disposed at one end of the third portion 3 far from the grounding point 8.

It can be understood that the third portion 3 and the U-shaped radiating arm not only realize connection between the first radiator and the circuit board 12, but also enable the first radiator to form a ring structure, so that the shielding cover 13 can be avoided more, the current intensity point of the antenna assembly is located in a region with better clearance environment, thereby increasing the effective radiating area of the antenna assembly and improving the overall radiating efficiency of the antenna assembly.

As shown in fig. 2 to 4, the U-shaped radiation arm includes a fourth portion 4, a fifth portion 5 and a sixth portion 6, one end of the fourth portion 4 is connected to the ground point 8, the fifth portion 5 is located at an end of the shielding cover 13 away from the third portion 3, at least part of the fifth portion 5 and orthographic projection of the shielding cover 13 on the plastic support are not overlapped, one end of the fifth portion 5 is connected to the other end of the fourth portion 4, one end of the sixth portion 6 is connected to the other end of the fifth portion 5, and the other end of the sixth portion 6 is connected to one end of the third portion 3 close to the first notch 9.

It can be understood that, through the arrangement of the fourth portion 4, the fifth portion 5 and the sixth portion 6, the U-shaped structure of the U-shaped radiating arm is realized, so that the formation of the first radiator ring structure is ensured, and at least part of the fifth portion 5 avoids the shielding cover 13, so that the current intensity point of the antenna assembly is located in a region with better headroom environment, thereby increasing the effective radiating area of the antenna assembly and improving the overall radiating efficiency of the antenna assembly.

The front projections of the fifth portion 5 and the shield 13 on the plastic bracket may not overlap, or the front projections of the fifth portion 5 and the shield 13 on the plastic bracket may not overlap.

In some embodiments, the length direction of the fourth portion 4 is parallel to the length direction of the sixth portion 6, the length direction of the fifth portion 5 is parallel to the length direction of the third portion 3, and the length direction of the fourth portion 4 is perpendicular to the length direction of the fifth portion 5.

It can be understood that the vertical and parallel relationship of the third portion 3, the fourth portion 4, the fifth portion 5 and the sixth portion 6 makes the first radiator easier to be disposed in the terminal device, and can further avoid the shielding cover 13 when disposed, thereby improving the overall radiation efficiency of the antenna assembly.

As shown in fig. 2-4, in some embodiments, the width of the fifth portion 5 is greater than the width of the fourth portion 4 and the sixth portion 6.

It can be understood that by this arrangement, the fourth portion 4 and the sixth portion 6 with narrower widths can pass through the shielding cover 13, and the fifth portion 5 with wider widths can avoid the shielding cover 13 more, so as to increase the effective radiation area of the first radiator on the whole, and further improve the overall radiation efficiency of the antenna assembly.

In some embodiments, the antenna assembly further includes a fixing hole 14, the fixing hole 14 is disposed on the circuit board 12, and the third portion 3 is provided with a third notch 11, where the third notch 11 makes the orthographic projections of the third portion 3 and the fixing hole 14 on the plastic bracket respectively not overlap.

In some embodiments, the second portion 2 is provided with a second notch 10, and the second notch 10 makes the orthographic projections of the second portion 2 and the fixing hole 14 on the plastic bracket respectively non-overlap.

It can be understood that the second notch 10 and the third notch 11 are used for avoiding metal fixing parts such as screws in the fixing hole 14, so as to avoid interference of the antenna assembly, make the current intensity point of the antenna assembly be located in a region with better clearance environment, and improve the overall radiation efficiency of the antenna assembly.

In some embodiments, the second notch 10 and the third notch 11 are disposed such that the second portion 2 and the third portion 3 are spaced from the fixing hole 14 by 0.3mm in the plane direction of the first radiator.

As shown in fig. 2, in some embodiments, the second gap 10 is larger than the third gap 11, thereby allowing the first portion 1 to compensate for the first gap 9 while allowing the second portion 2 to be as far away from the fixation hole 14 as possible.

As shown in fig. 2, the embodiment of the present application further proposes a terminal device, including: such as the antenna assembly described above.

It can be understood that the first radiator and the second radiator are respectively arranged on the opposite side surfaces of the plastic bracket, so that a double-sided structural design is formed, the overall radiation area is increased, the overall radiation efficiency of the antenna assembly is effectively improved, and the antenna assembly can still keep higher performance in a poor antenna clearance environment.

In some embodiments, the terminal device may be a cell phone, a tablet motor, a smart watch, or the like.

In some embodiments, the terminal device further includes a rear housing, the plastic support is located between the rear housing and the circuit board 12, a distance between the shielding case 13 and the rear housing is 0.7mm, that is, an antenna headroom of the antenna assembly is less than 0.7mm, and a distance between the first radiator and the shielding case 13 may be 0.65mm. It can be understood that the arrangement of the spacing of 0.65mm ensures that the whole antenna assembly has a better antenna clearance environment, and improves the radiation efficiency of the whole antenna assembly.

As shown in fig. 5, one curve is an antenna assembly including only the first radiator, the other curve is an antenna assembly of the present application, and the abscissa is frequency and the ordinate is radiation efficiency. As can be seen from fig. 5, due to the arrangement of the first notch 9, a small efficiency pit is formed at 3.06GHz in both curves, and the antenna assembly of the present application has an efficiency improvement of about 0.5dB compared to the antenna assembly including only the first radiator.

As shown in fig. 6, 7 and 8, as can be seen from the current simulation results, the initial quarter eigenmode and the half-wavelength feeding point introducing mode of the antenna assembly have strong radiation current distribution, and have high radiation efficiency.

In some embodiments, the current simulation may be implemented by CST software, where the CST software includes eight studio sub-software, integrated in the same user interface, providing complete system-level and component-level numerical simulation optimization for the user, and the CST software covers the whole electromagnetic frequency band, providing complete time-domain and frequency-domain full-wave electromagnetic algorithm and high-frequency algorithm, and typically applying various collaborative simulations including electromagnetic compatibility, antenna, mobile phone, nuclear magnetic resonance, electric vacuum tube, particle accelerator, high-power microwave, nonlinear optics, electric, field path, etc.

It should be noted that in the description of the present application, 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 application, 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 application 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 application.

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 application. 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 application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, 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 application.

Claims

1. An antenna assembly, comprising:

a plastic stent, the plastic stent comprising: a first surface and a second surface opposite to each other;

the first radiator is arranged on the first surface, one end of the first radiator is provided with a first feed point, and the other end of the first radiator is provided with a grounding point;

and the second radiator is arranged on the second surface, and one end of the second radiator is provided with a second feed point.

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

the circuit board is positioned on the second surface side of the plastic bracket, and the first feeding point, the second feeding point and the grounding point are respectively and electrically connected with the circuit board;

the shielding cover is arranged on the circuit board, the shielding cover is positioned between the circuit board and the second surface, the orthographic projections of the first feeding point, the grounding point and the shielding cover on the plastic support are not overlapped, the orthographic projections of the second feeding point and the shielding cover on the plastic support are not overlapped, the orthographic projections of at least part of the first radiator and the shielding cover on the plastic support are not overlapped, and the orthographic projections of the second radiator and the shielding cover on the plastic support are not overlapped.

3. The antenna assembly according to claim 2, wherein the orthographic projections of the first feeding point and the second feeding point on the plastic support are overlapped, respectively, a connection hole is formed on the plastic support, and the first feeding point and the second feeding point are connected through the connection hole.

4. The antenna assembly of claim 2, wherein the first face is provided with a dispensing area, one end of the first radiator near the first feeding point is provided with a first notch, and at least part of the second radiator overlaps with at least part of the first notch respectively in orthographic projection on the plastic support.

5. The antenna assembly of claim 4, wherein the second radiator comprises:

a first portion overlapping orthographic projections of at least a portion of the first notch on the plastic support respectively;

and one end of the second part is connected with the first part, and the other end of the second part is connected with the second feeding point.

6. The antenna assembly of claim 5, wherein the first radiator comprises:

the orthographic projection of at least part of the U-shaped radiation arm and the shielding cover on the plastic bracket are not overlapped, and one end of the U-shaped radiation arm is connected with the grounding point;

the front projection of the third part and the shielding cover on the plastic support are not overlapped, one end of the third part is connected with the other end of the U-shaped radiation arm, the other end of the third part is connected with the first feeding point, the first feeding point is close to the grounding point, and the first notch is arranged at one end of the third part far away from the grounding point.

7. The antenna assembly of claim 6, wherein the U-shaped radiating arm comprises:

a fourth part, one end of which is connected with the grounding point;

the fifth part is positioned at one end of the shielding cover far away from the third part, at least part of the fifth part and orthographic projection of the shielding cover on the plastic bracket are not overlapped, and one end of the fifth part is connected with the other end of the fourth part;

and one end of the sixth part is connected with the other end of the fifth part, and the other end of the sixth part is connected with one end, close to the first notch, of the third part.

8. The antenna assembly of claim 7, wherein the width of the fifth portion is greater than the width of the fourth portion and the sixth portion.

9. The antenna assembly of claim 6, further comprising:

the fixing hole is formed in the circuit board, a third notch is formed in the third portion, and orthographic projections of the third portion and the fixing hole on the plastic support are not overlapped through the third notch.

10. The antenna assembly of claim 9, wherein the second portion is provided with a second notch, the second notch causing no overlapping of orthographic projections of the second portion and the fixing hole, respectively, on the plastic bracket.

11. A terminal device, comprising: an antenna assembly as claimed in any one of claims 1 to 10.