WO2020143665A1

WO2020143665A1 - Antenna structure and communication terminal

Info

Publication number: WO2020143665A1
Application number: PCT/CN2020/070917
Authority: WO
Inventors: 王义金; 简宪静
Original assignee: 维沃移动通信有限公司
Priority date: 2019-01-10
Filing date: 2020-01-08
Publication date: 2020-07-16
Also published as: CN109728421A

Abstract

The present disclosure provides an antenna structure and a communication terminal, wherein the antenna structure comprises: a first coupling sheet, a second coupling sheet, a ground plate, a first coupling feed structure and a second coupling feed structure; the second coupling sheet is arranged between the first coupling sheet and the ground plate, the first coupling sheet, the second coupling sheet and the ground plate are not in contact between any two among them; the first coupling feed structure comprises a first feed line and a first feed sheet connected with the first feed line, the second coupling feed structure comprises a second feed line and a second feed sheet connected with the second feed line, both the first feed sheet and the second feed sheet are arranged between the first coupling sheet and the second coupling sheet, the first feed sheet, the second feed sheet, the first coupling sheet and the second coupling sheet are not in contact between any two among them, and both the first coupling sheet and the second coupling sheet are coupled with the first feed sheet and the second feed sheet.

Description

Antenna structure and communication terminal

Cross-reference of related applications

This application claims the priority of Chinese Patent Application No. 201910023263.7 filed in China on January 10, 2019, the entire contents of which are hereby incorporated by reference.

Technical field

The present disclosure relates to the field of communication technology, and in particular, to an antenna structure and a communication terminal.

Background technique

With the rapid development of communication technology, multi-antenna communication has become the mainstream and future development trend of communication terminals, and in this process, millimeter wave antennas are gradually introduced to communication terminals. In actual application scenarios, communication terminals have the need to support multiple frequencies. When the communication terminal needs to support multi-frequency, more antenna units need to be provided to meet the multi-frequency requirements of the communication terminal, resulting in a higher cost of the communication terminal.

Summary of the invention

An embodiment of the present disclosure provides an antenna structure and a communication terminal to solve the problem that the communication terminal needs to be provided with more antenna units to meet the multi-frequency requirements of the communication terminal, thereby causing the problem of higher cost of the communication terminal.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In a first aspect, an embodiment of the present disclosure provides an antenna structure, including: a first coupling plate, a second coupling plate, a ground plate, a first coupling feed structure and a second coupling feed structure; the second coupling plate It is arranged between the first coupling piece and the ground plate, and the first coupling piece, the second coupling piece and the ground plate are not in contact with each other; the first coupling feed structure It includes a first feeder and a first feeder connected to the first feeder, the second coupled feeder structure includes a second feeder and a second feeder connected to the second feeder, the first The power feeding sheet and the second power feeding sheet are both disposed between the first coupling piece and the second coupling piece, the first power feeding piece, the second power feeding piece, the first There is no contact between the coupling piece and the second coupling piece, and both the first coupling piece and the second coupling piece are coupled with the first feeding piece and the second feeding piece; The second coupling piece is provided with a first through hole for passing the first feed line and a second through hole for passing the second feed line, neither the first feed line nor the second feed line contacts The second coupling piece; the ground plate is provided with a third through hole through which the first feed line passes and a fourth through hole through which the second feed line passes, the first feed line and the first Neither feeder line contacts the ground plate.

In a second aspect, an embodiment of the present disclosure also provides a communication terminal, including the above antenna structure.

An antenna structure according to an embodiment of the present disclosure includes: a first coupling plate, a second coupling plate, a ground plate, a first coupling feed structure and a second coupling feed structure; the second coupling plate is disposed on the first Between a coupling plate and the ground plate, there is no contact between the first coupling plate, the second coupling plate and the ground plate; the first coupling feed structure includes a first feed line and A first feeder connected to the first feeder, the second coupled feeder structure includes a second feeder and a second feeder connected to the second feeder, the first feeder and the second feeder The second power feed sheet is provided between the first coupling sheet and the second coupling sheet, the first power feeding sheet, the second power feeding sheet, the first coupling sheet and the There is no contact between the second coupling pieces, and the first coupling piece and the second coupling piece are coupled with the first power feeding piece and the second power feeding piece; on the second coupling piece There is a first through hole through which the first feed line passes and a second through hole through which the second feed line passes, neither the first feed line nor the second feed line contacts the second coupling piece ; The ground plate is provided with a third through hole for the first feed line and a fourth through hole for the second feed line, the first feed line and the second feed line are not in contact The ground plate. In this way, since the first coupling piece and the second coupling piece are respectively coupled with the feeding piece to form a plurality of resonance frequency bands, so that the antenna can cover a plurality of millimeter wave frequency bands and improve the roaming communication function of the antenna, the array antenna formed by the antenna unit , The number of array antennas is reduced, the storage space of the communication terminal is reduced, and the cost of the communication terminal is saved.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required in the description of the embodiments of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For a person of ordinary skill in the art, without paying any creative labor, other drawings can also be obtained based on these drawings.

FIG. 1 is a structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

2 is a second structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

3 is a third structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

4 is a fourth structural schematic diagram of an antenna structure provided by an embodiment of the present disclosure;

5 is one of the schematic diagrams of the return loss provided by the embodiment of the present disclosure;

6 is a fifth structural diagram of an antenna structure provided by an embodiment of the present disclosure;

7 is a sixth structural diagram of an antenna structure provided by an embodiment of the present disclosure;

8 is a second schematic diagram of return loss provided by an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present disclosure.

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 1, it includes a first coupling sheet 1, a second coupling sheet 2, a ground plate 3, a first coupling feed structure 4 and The second coupling feed structure 5; the second coupling plate 2 is disposed between the first coupling plate 1 and the ground plate 3, the first coupling plate 1, the second coupling plate 2 and all The ground plates 3 are not in contact with each other; the first coupled feed structure 4 includes a first feed line and a first feed sheet connected to the first feed line, and the second coupled feed structure 5 includes A second feeder and a second feeder connected to the second feeder, the first feeder and the second feeder are both provided on the first coupling piece 1 and the second coupling piece Between 2, the first feed sheet, the second feed sheet, the first coupling sheet 1 and the second coupling sheet 2 are not in contact with each other, the first coupling sheet 1 And the second coupling sheet 2 are coupled with the first feed sheet and the second feed sheet; the second coupling sheet 2 is provided with a first through hole for the first feed line to pass through And a second through hole through which the second feed line passes, neither the first feed line nor the second feed line contacts the second coupling piece 2; the ground plate 3 is provided with the first feed line The third through hole through which the feeder line passes and the fourth through hole through which the second feeder line passes, and neither the first feeder line nor the second feeder line contact the ground plate 3.

In this embodiment, both the first coupling sheet 1 and the second coupling sheet 2 are metal conductors (such as multilayer PCB boards), and the first feeder and the second feeder may be covered with an insulating layer. The first coupled feed structure 4 includes a first feed line and a first feed sheet connected to the first feed line, and the second coupled feed structure 5 includes a second feed line and a second feed line connected to the second feed line The second feed sheet.

At this time, please refer to FIG. 2, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. One end of the first feeder is connected to the first feed sheet, and the other end is connected to the first feed source 6; one end of the second feeder It is connected to the second feeding piece, and the other end is connected to the second feeding source 7. The first coupling piece 1 is directly above the second coupling piece 2, and the first coupling piece 1 and the second coupling piece 2 are both above the ground plate 3. The distance between the first coupling plate 1 and the second coupling plate 2 may be optionally 0.22 mm, and the distance between the second coupling plate 2 and the ground plate 3 may be optionally 0.6 mm. The distance between the first feed sheet and the first coupling sheet 1 may be equal to the distance between the first feed sheet and the second coupling sheet 2, and the distance may optionally be 0.1 mm. Similarly, the distance between the second power feed plate and the first coupling plate 1 may be equal to the distance between the second power feed plate and the second coupling plate 2, and the distance may also be 0.1 mm.

In this embodiment, in order to better understand the first power feed sheet and the second power feed sheet, refer to FIG. 3. FIG. 3 is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. In addition, in FIG. 3, the first coupling sheet 1 shields the first power feeding sheet and the second power feeding sheet, so that the first power feeding sheet and the second power feeding sheet can be better understood.

In this embodiment, the above antenna structure may be a millimeter wave antenna, which may cover multiple frequency bands of the millimeter wave band. Compared to an antenna-in-package (AiP) covering one frequency band, multiple frequency bands require multiple AiP The design of the present disclosure can achieve the purpose of reducing antenna space and saving costs. At the same time, by using the ground plate 3 as a reflector, the millimeter wave antenna can obtain higher gain. In addition, the antenna can be designed with a high degree of symmetry, and each antenna unit itself can form Multiple-Input Multiple-Output (MIMO), which improves the transmission rate of the communication terminal, and at the same time makes the array antenna beam formed by the millimeter wave antenna scan The performance in both forward and reverse directions is similar.

Optionally, the area of the first coupling plate 1 is smaller than the area of the second coupling plate 2, and the area of the second coupling plate 2 is smaller than the area of the ground plate 3.

In this embodiment, the area of the first coupling sheet 1 is smaller than the area of the second coupling sheet 2, and the area of the second coupling sheet 2 is smaller than the area of the ground plate 3, which can make the antenna structure have a better Performance. Moreover, since the area of the ground plate 3 is larger than the area of the first coupling plate 1 and the area of the second coupling plate 2, the ground plate 3 is equivalent to a reflector, so that the radiation of the first coupling plate 1 and the second coupling plate 2 can be The signal is effectively reflected.

Optionally, the centers of the first coupling piece 1 and the second coupling piece 2 are on the same straight line, and the straight line is perpendicular to the first coupling piece 1 and the second coupling piece 2.

In this embodiment, the centers of the first coupling sheet 1 and the second coupling sheet 2 are on the same straight line, and the straight line is perpendicular to the first coupling sheet 1 and the second coupling sheet 2, thereby facilitating The antenna structure is highly symmetrical designed to facilitate the formation of MIMO. Of course, the straight line may also pass through the center of the ground plate 3, which is not limited in this embodiment.

Optionally, the shapes of the first power feed sheet and the second power feed sheet are both rectangular.

In this embodiment, the shapes of the first power feed sheet and the second power feed sheet are both rectangular. Of course, in addition to being rectangular, the shapes of the first and second power feed sheets may also be square, sector, round, regular triangle, regular pentagon, regular hexagon, or any other irregular shapes, etc. However, this embodiment is not limited.

Optionally, the shapes of the first coupling sheet 1 and the second coupling sheet 2 are both square.

In this embodiment, in order to better understand the above setting mode, refer to FIG. 1. In FIG. 1, the shapes of the first coupling sheet 1 and the second coupling sheet 2 are both square. Of course, in addition to the square shape, the shapes of the first coupling sheet 1 and the second coupling sheet 2 may also be regular triangles, regular pentagons, regular hexagons, etc., which is not limited in this embodiment.

Optionally, a first straight line determined by the first through hole and the midpoint of the second coupling sheet 2 passes through the midpoint of the first side of the second coupling sheet 2, the first through hole The distance from the midpoint of the first side is smaller than the distance between the first through hole and the midpoint of the second coupling plate 2;

A second straight line determined by the second through hole and the midpoint of the second coupling sheet 2 passes through the midpoint of the second side of the second coupling sheet 2, the second through hole and the second The distance between the midpoints of the sides is smaller than the distance between the second through holes and the midpoint of the second coupling sheet 2;

The first straight line is perpendicular to the second straight line.

In this embodiment, in order to better understand the above settings, please refer to FIG. 4, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. In addition, in FIG. 4, the shielding of the second coupling plate 2 by the first coupling plate 1 is removed, so that the arrangement of the first through holes and the second through holes on the second coupling plate 2 can be better understood.

In FIG. 4, the left through hole on the second coupling piece 2 is the first through hole, and the left side is the first side. It can be seen that the distance between the first through-hole and the midpoint of the first side is smaller than the distance between the first through-hole and the midpoint of the second coupling plate 2, and it can be understood that the first through-hole is close to the first side Make settings. The upper and lower through holes of the second coupling sheet 2 are second through holes, and the lower side is the second side. Similarly, the distance between the second through-hole and the midpoint of the second side is smaller than the distance between the second through-hole and the midpoint of the second coupling plate 2, and it can be understood that the second through-hole is close to the second side Side.

In this embodiment, the first feed line is connected to the first feed source, and the second feed line is connected to the second feed source. At this time, refer to FIG. 5, which is a schematic diagram of return loss provided by an embodiment of the present disclosure. As shown in Fig. 5, S1, 1 is the return loss due to the feed signal of the first feed, S2, 2 is the return loss due to the feed signal of the second feed, and the antenna can cover 26.5GHz to 29.5GHz , 37GHz～40GHz. The working mechanism of the antenna is that the second coupling plate 2 is excited by a feeder connected to a feeder at a lower frequency, and the first coupling plate 1 is excited by a feeder connected to a feeder at a higher frequency.

Optionally, the long side of the first feeder is perpendicular to the first straight line, and the long side of the second feeder is perpendicular to the second straight line.

In this embodiment, the long side of the first power feed sheet is perpendicular to the first straight line, and the long side of the second power feed sheet is perpendicular to the second straight line.

Optionally, the shapes of the first coupling sheet 1 and the second coupling sheet 2 are both circular.

In this embodiment, in order to better understand the above setting manner, reference may be made to FIG. 6, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. As shown in FIG. 6, the shapes of the first coupling sheet 1 and the second coupling sheet 2 are both circular. Of course, in addition to the square shape, the shapes of the first coupling sheet 1 and the second coupling sheet 2 may also be regular triangles, regular pentagons, regular hexagons, etc., which is not limited in this embodiment.

Optionally, the third straight line is perpendicular to the fourth straight line, the third straight line is determined by the midpoint of the first through hole and the second coupling piece 2, and the fourth straight line is determined by the second through hole The midpoint of the second coupling sheet 2 is determined;

The distance between the first through hole and the circumference of the second coupling plate 2 is smaller than the distance between the first through hole and the midpoint of the second coupling plate 2;

The distance between the second through hole and the circumference of the second coupling piece 2 is smaller than the distance between the second through hole and the midpoint of the second coupling piece 2.

In this embodiment, in order to better understand the above setting manner, reference may be made to FIG. 7, which is a schematic structural diagram of an antenna structure provided by an embodiment of the present disclosure. In addition, in FIG. 7, the shielding of the second coupling plate 2 by the first coupling plate 1 is removed, so that the arrangement of the first through holes and the second through holes on the second coupling plate 2 can be better understood.

In FIG. 7, the first through hole is a through hole relatively to the left, and the second through hole is a through hole relatively to the right. The distance between the first through hole and the circumference of the second coupling plate 2 is smaller than the distance between the first through hole and the midpoint of the second coupling plate 2; the distance between the second through hole and the circumference of the second coupling plate 2 Less than the distance between the second through hole and the midpoint of the second coupling piece 2.

Please refer to FIG. 8 again, which is a schematic diagram of return loss provided by an embodiment of the present disclosure. As shown in FIG. 8, the antenna can cover 26.2 GHz to 29.5 GHz, and 37 GHz to 40 GHz, which can improve the antenna bandwidth and antenna efficiency.

Optionally, the long side of the first feeder is perpendicular to the third straight line, and the long side of the second feeder is perpendicular to the fourth straight line.

In this embodiment, the long side of the first feeder is perpendicular to the third straight line, and the long side of the second feeder is perpendicular to the fourth straight line.

Optionally, the gap between the first coupling sheet 1, the second coupling sheet 2 and the ground plate 3 is filled with a non-conductive medium.

In this embodiment, the gap between the first coupling sheet 1, the second coupling sheet 2 and the ground plate 3 is filled with a non-conductive medium, which can make the antenna have better structural strength.

Optionally, both the first feeder and the second feeder are wrapped by an insulating layer.

In this embodiment, the first feeder and the second feeder are both surrounded by an insulating layer, so that the contact between the first feeder and the second feeder and the second coupling sheet 2 can be well avoided, and can also be well avoided The contact between the first feeder and the second feeder and the ground plate 3 prevents the antenna from failing. Moreover, due to the presence of the insulating layer, the first feeder and the second feeder can also be protected, which increases the service life of the antenna.

An antenna structure according to an embodiment of the present disclosure includes a first coupling plate 1, a second coupling plate 2, a ground plate 3, a first coupling feed structure 4 and a second coupling feed structure 5; the second coupling plate 2 Provided between the first coupling sheet 1 and the ground plate 3, the first coupling sheet 1, the second coupling sheet 2 and the ground plate 3 are not in contact with each other; the first A coupled feed structure 4 includes a first feed line and a first feed sheet connected to the first feed line, and the second coupled feed structure 5 includes a second feed line and a second feed connected to the second feed line The electric sheet, the first feeding sheet and the second feeding sheet are both disposed between the first coupling sheet 1 and the second coupling sheet 2, the first feeding sheet, the first The two feeding plates, the first coupling plate 1 and the second coupling plate 2 are not in contact with each other, and the first coupling plate 1 and the second coupling plate 2 are both in contact with the first feed The electric sheet and the second feeding sheet are coupled; the second coupling sheet 2 is provided with a first through hole through which the first feed line passes and a second through hole through which the second feed line passes, Neither the first feed line nor the second feed line contacts the second coupling plate 2; the ground plate 3 is provided with a third through hole for passing the first feed line and the second feed line Through the fourth through hole, neither the first feeder nor the second feeder contacts the ground plate 3. The above antenna structure can be a millimeter wave antenna, which can cover multiple frequency bands of the millimeter wave band to improve the roaming communication function of the communication terminal. Compared with one AiP covering one frequency band, multiple frequency bands require multiple AiP designs. The present disclosure may To achieve the purpose of reducing antenna space and saving costs. At the same time, by using the ground plate 3 as a reflector, the millimeter wave antenna can obtain higher gain. In addition, the antenna can be designed with a high degree of symmetry. Each antenna unit itself can form MIMO to improve the transmission rate of the communication terminal. At the same time, the array antenna formed by the millimeter wave antenna can also perform similarly in the forward and reverse directions when scanning the beam.

An embodiment of the present disclosure also provides a communication terminal, including the above antenna structure.

In this embodiment, the communication terminal may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a personal digital assistant (personal digital assistant (PDA), a mobile Internet device (Mobile Internet Device (MID) Or wearable device (Wearable Device) and so on.

It should be noted that in this article, the terms "include", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, It also includes other elements that are not explicitly listed, or include elements inherent to such processes, methods, objects, or devices. Without more restrictions, the element defined by the sentence "include one..." does not exclude that there are other identical elements in the process, method, article or device that includes the element.

The embodiments of the present disclosure have been described above with reference to the drawings, but the present disclosure is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only schematic, not limiting, and those of ordinary skill in the art Under the inspiration of the present disclosure, many forms can be made without departing from the purpose of the present disclosure and the scope protected by the claims, all of which fall within the protection of the present disclosure.

Claims

An antenna structure includes: a first coupling piece, a second coupling piece, a ground plate, a first coupling feeding structure and a second coupling feeding structure; the second coupling piece is disposed on the first coupling piece and the Between the ground plates, the first coupling piece, the second coupling piece, and the ground plate are not in contact with each other;

The first coupled feed structure includes a first feed line and a first feeder connected to the first feed line, and the second coupled feed structure includes a second feed line and a second connected to the second feed line A power feeding piece, the first power feeding piece and the second power feeding piece are both arranged between the first coupling piece and the second coupling piece, the first power feeding piece, the second The feeder, the first coupling piece and the second coupling piece are not in contact with each other, and the first coupling piece and the second coupling piece are both in contact with the first feeder piece and the The second feeder is coupled;

The second coupling piece is provided with a first through hole through which the first feed line passes and a second through hole through which the second feed line passes, and the first feed line and the second feed line are not in contact The second coupling sheet;

The ground plate is provided with a third through hole through which the first feed line passes and a fourth through hole through which the second feed line passes. Neither the first feed line nor the second feed line contacts the Describe the ground plate.
The antenna structure according to claim 1, wherein the area of the first coupling plate is smaller than the area of the second coupling plate, and the area of the second coupling plate is smaller than the area of the ground plate.
The antenna structure according to claim 1, wherein the centers of the first coupling piece and the second coupling piece are on the same straight line, and the straight line is perpendicular to the first coupling piece and the second coupling piece .
The antenna structure according to claim 1, wherein the shapes of the first power feed sheet and the second power feed sheet are both rectangular.
The antenna structure according to claim 4, wherein the shapes of the first coupling sheet and the second coupling sheet are both square.
The antenna structure according to claim 5, wherein a first straight line defined by a midpoint of the first through hole and the second coupling piece passes through a midpoint of the first side of the second coupling piece, The distance between the first through hole and the midpoint of the first side is smaller than the distance between the first through hole and the midpoint of the second coupling plate;

A second straight line determined by the second through hole and the midpoint of the second coupling piece passes through the midpoint of the second side of the second coupling piece, the second through hole and the second side The distance between the midpoints of is smaller than the distance between the second through holes and the midpoint of the second coupling plate;

The first straight line is perpendicular to the second straight line.
The antenna structure according to claim 6, wherein the long side of the first feeder is perpendicular to the first straight line, and the long side of the second feeder is perpendicular to the second straight line.
The antenna structure according to claim 4, wherein the shapes of the first coupling sheet and the second coupling sheet are both circular.
The antenna structure according to claim 8, wherein a third straight line is perpendicular to a fourth straight line, the third straight line is determined by a midpoint of the first through hole and the second coupling piece, the fourth straight line Determined by the midpoint of the second through hole and the second coupling piece;

The distance between the first through hole and the circumference of the second coupling piece is smaller than the distance between the first through hole and the midpoint of the second coupling piece;

The distance between the second through hole and the circumference of the second coupling piece is smaller than the distance between the second through hole and the midpoint of the second coupling piece.
The antenna structure according to claim 9, wherein the long side of the first feeder is perpendicular to the third straight line, and the long side of the second feeder is perpendicular to the fourth straight line.
The antenna structure according to claim 1, wherein the gap between the first coupling piece, the second coupling piece and the ground plate is filled with a non-conductive medium.
The antenna structure according to claim 1, wherein the first feeder and the second feeder are both surrounded by an insulating layer.
A communication terminal, including the antenna structure according to any one of claims 1 to 12.