WO2021119936A1

WO2021119936A1 - Antenna and antenna array

Info

Publication number: WO2021119936A1
Application number: PCT/CN2019/125696
Authority: WO
Inventors: 刘时杰; 陈勇利
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2021-06-24

Abstract

The present invention relates to the technical field of communications, and relates in particular to an antenna and an antenna array. The antenna comprises a substrate and a half-wave folded dipole, a first director, and a second director arranged on a surface of the substrate. The half-wave folded dipole, the first director, and the second director are spaced apart; the first director is located between the second director and the half-wave folded dipole; the shape of the half-wave folded dipole is a ring provided with an opening; and the half-wave folded dipole comprises a first end and a second end that oppose each other, the first end being used for feed, and the second end being used for grounding. The antenna array comprises 1×2 or 1×3 of the described antennas. The technical solution of the present invention has a simple structure, could be easily miniaturized, and has a strong anti-interference capability.

Description

Antenna and antenna array

Technical field

The present invention relates to the field of communication technology, in particular to an antenna and an antenna array.

Background technique

The fifth-generation mobile communication technology will greatly change people’s existing lifestyles and promote the continuous development of society. In order to adapt to the technical characteristics of 5G high-speed, low-latency, and high-capacity in the future, base station antennas will also be more large-scale Array antennas therefore also put forward higher requirements for antenna elements. The existing antenna has a complex structure, is difficult to achieve miniaturization, and has poor anti-interference ability.

Therefore, it is necessary to provide an antenna with a simple structure to solve the above-mentioned problems.

technical problem

The object of the present invention is to provide an antenna and an antenna array with a simple structure.

Technical solutions

The technical scheme of the present invention is as follows:

The present invention provides an antenna. The antenna includes a substrate, a half-wave folding vibrator, a first director and a second director arranged on a surface of the substrate, the half-wave folding vibrator, the first guide The director and the second director are arranged at intervals, and the first director is located between the second director and the half-wave folding vibrator, and the shape of the half-wave folding vibrator is an open In a ring shape, the half-wave folding vibrator includes a first end and a second end opposite to each other. The first end is used for power feeding, and the second end is used for grounding.

As an improvement, the first guide includes a first guide and a second guide. The first guide and the second guide are located on the same straight line. A guiding piece and the second guiding piece are separated by a first distance, and a gap is formed between the first guiding piece and the second guiding piece.

As an improvement, the straight line on which the first guiding member and the second guiding member are located is parallel to the length direction of the half-wave folding vibrator.

As an improvement, the first guide further includes a third guide member and a fourth guide member, the third guide member is electrically connected to the first guide member, and the third guide member is electrically connected to the first guide member. The guiding piece is perpendicular to the first guiding piece, the fourth guiding piece is electrically connected to the second guiding piece, and the fourth guiding piece is perpendicular to the second guiding piece.

As an improvement, the projection of the second guide on the straight line where the first guide member and the second guide member are located shields the gap.

As an improvement, the second guide is parallel to the straight line where the first guide and the second guide are located.

As an improvement, the half-wave reentrant vibrator has a square, elliptical or racetrack-shaped ring structure, and the straight line on which the first guide member and the second guide member are located is the same as the length of the square. The sides, the long axis of the ellipse, or the straight sides of the racetrack are parallel.

As an improvement, the antenna further includes a first ground plate, a second ground plate, and a feeder line. The first ground plate, the second ground plate, the feeder line, and the half-wave folded vibrator are arranged on the substrate. The feed line is located between the first ground plate and the second ground plate, the feed line is electrically connected to the first end, and the first ground plate and the second ground plate are electrically connected to each other. The terminals are electrically connected.

As an improved manner, the antenna further includes a third ground plate, the third ground plate is arranged on the surface of the substrate opposite to the half-wave folding vibrator, and the third ground plate is respectively connected to the first ground plate. The ground sheet and the second ground sheet are electrically connected.

The present invention also provides an antenna array, which includes 1×2 or 1×3 the above-mentioned antennas.

Beneficial effect

Compared with the prior art, the antenna of the present invention includes a substrate and a half-wave folding vibrator arranged on a surface of the substrate, a first director and a second director, the half-wave folding vibrator , The first director and the second director are arranged at intervals, and the first director is located between the second director and the half-wave folding vibrator, and the half-wave folding vibrator The shape of the half-wave folding vibrator is a ring with an opening. The half-wave folding vibrator includes opposite first and second ends. The first end is used for feeding power, and the second end is used for grounding. The antenna structure is simple, It is easy to realize miniaturization and has strong anti-interference ability.

The first guide of the present invention includes a first guide member and a second guide member, the first guide member and the second guide member are located on the same straight line, and the first guide member and The second guiding member is separated by a first distance, and a gap is formed between the first guiding member and the second guiding member. The first distance can be adjusted to improve the radiation efficiency of the antenna.

The second director of the present invention improves the gain of the antenna, reduces the side lobe, and improves the anti-interference ability of the antenna.

The antenna array of the present invention includes 1×2 or 1×3 the above-mentioned antennas, and the antenna array has a simple structure and is easy to be miniaturized.

Description of the drawings

FIG. 1 is a schematic diagram of a three-dimensional structure of an antenna provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of a three-dimensional structure of a radiation unit provided by an embodiment of the present invention.

Fig. 3 is a schematic diagram of a three-dimensional structure of a director provided by an embodiment of the present invention.

FIG. 4 is a schematic diagram of a three-dimensional structure of an antenna provided by an embodiment of the present invention.

Fig. 5 is a schematic diagram of an S parameter curve of an antenna provided by an embodiment of the present invention.

Fig. 6 is a directional diagram of the antenna provided by an embodiment of the present invention on the elevation plane Theta=90°.

Fig. 7 is a directional diagram of the antenna provided by an embodiment of the present invention on the plane of the azimuth plane Phi=90°.

FIG. 8 is a schematic diagram of the radiation direction of the antenna provided by an embodiment of the present invention.

FIG. 9A is a schematic structural diagram of a first antenna array provided by an embodiment of this application.

FIG. 9B is a schematic structural diagram of a second antenna array provided by an embodiment of this application.

FIG. 10 is a schematic diagram of the S curve of the first antenna array provided by an embodiment of the present invention.

FIG. 11 is a directional diagram of the first antenna array on the elevation plane Theta=90° provided by an embodiment of the present invention.

FIG. 12 is a directional diagram of the first antenna array provided by an embodiment of the present invention on a plane of azimuth plane Phi=90°.

FIG. 13 is a schematic diagram of the radiation direction of the first antenna array provided by an embodiment of the present invention.

FIG. 14 is a schematic diagram of an S curve of a second antenna array provided by an embodiment of the present invention.

FIG. 15 is a directional diagram of the second antenna array on the elevation plane Theta=90° provided by an embodiment of the present invention.

FIG. 16 is a directional diagram of the second type of antenna array provided by an embodiment of the present invention on the plane of the azimuth plane Phi=90°.

FIG. 17 is a schematic diagram of the radiation direction of the second antenna array provided by an embodiment of the present invention.

Embodiments of the present invention

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not used to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, without having to use To describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in a sequence other than the content illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those clearly listed. Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

It should be noted that the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. . Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on what can be achieved by a person of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

Please refer to FIG. 1 together. The present invention provides an antenna 1. The antenna 1 includes a substrate 10, a radiating unit 20 disposed on the surface of the substrate 10, a feeder 30 disposed on the surface of the substrate 10, and a ground disposed on the substrate 10. The assembly 40 and the director 50 provided on the surface of the substrate 10. The feed line 30 is electrically connected to the radiating unit 20, the grounding assembly 40 is electrically connected to the radiating unit 20, and the director 50 and the radiating unit 20 are spaced apart.

Referring to Fig. 2, the radiating element 20 is a half-wave folding vibrator, and the shape of the half-wave folding vibrator is a ring with an opening 23. Specifically, the half-wave folding vibrator is a square, elliptical or racetrack-shaped ring structure. In the embodiment, the shape of the half-wave folding back vibrator is a square ring structure. The half-wave folding vibrator includes a first end 21 and a second end 22 opposite to each other. The first end 21 is used for feeding power, and the second end 22 is used for grounding. The radiating unit 20 is a half-wave folding vibrator, which improves the impedance of the antenna 1, and the radiating unit 20 can better match the feeder line 30.

Please refer to FIG. 3, the director 50 and the radiation unit 20 are arranged on the same surface of the substrate 10. The director 50 includes a first director 51 and a second director 52. The first director 51 and the radiation unit 20 are spaced apart, and the second director 52 and the first director 51 are spaced apart. The director 51 is located between the second director 52 and the radiation unit 20.

The first guide 51 includes a first guide unit 511 and a second guide unit 512. The first guide unit 511 and the second guide unit 512 are arranged at intervals. Specifically, the first guide unit 511 and the second guide unit 512 are arranged at intervals. The direction unit 512 is separated by a first distance D, and a gap is formed between the first direction unit 511 and the second direction unit 512. The first guiding unit 511 and the second guiding unit 512 are symmetrical to each other.

The first guide unit 511 includes a first guide member 5111 and a third guide member 5112. The first guide member 5111 is electrically connected to the third guide member 5112. The first guide member 5111 and the third guide member 5112 are electrically connected to each other. 5112 are perpendicular to each other, and the third guiding member 5112 is located on the side of the first guiding member 5111 away from the radiation unit 20. When the radiating unit 20 is square, the first guiding member 5111 is parallel to the long side of the square. When the radiating unit 20 is elliptical, the first guiding member 5111 is parallel to the long axis of the ellipse, and the radiating unit 20 is a racetrack. When the shape is formed, the first guiding member 5111 and the straight line of the racetrack shape become parallel.

The second guiding unit 512 includes a second guiding member 5121 and a fourth guiding member 5122, the second guiding member 5121 is electrically connected to the fourth guiding member 5122, the second guiding member 5121 and the fourth guiding member 5121 5122 are perpendicular to each other, and the fourth guiding member 5122 is located on the side of the second guiding member 5121 away from the radiation unit 20. The second guide member 5121 and the first guide member 5111 are located on the same straight line, the first guide member 5111 and the second guide member 5121 are separated by a first distance D, the first guide member 5111 and the second guide member 5111 A gap is formed between 5121. The maximum of the first distance D is not limited, and can be set as required. The radiation efficiency of the antenna 1 can be improved by adjusting the size of the first distance D. The straight line where the first guiding member 5111 and the second guiding member 5121 are located is parallel to the length direction of the half-wave folding vibrator. Specifically, when the radiation unit 20 is in a square shape, the first guiding member 5111 is parallel to the long side of the square. When the radiation unit 20 is in an elliptical shape, the first guiding member 5111 is parallel to the long axis of the ellipse. When 20 is in the shape of a racetrack, the first guide member 5111 and the racetrack-shaped straight line become parallel, that is, the straight line where the first guide member 5111 and the second guide member 5121 are located is in line with the long side of the square and the long axis of the ellipse. Or the straight sides of the racetrack shape are parallel.

The projection of the second guide 52 on the first guide 51 shields the gap between the first guide 5111 and the second guide 5121, specifically, the second guide The projection of the device 52 on the straight line where the first guiding member 5111 and the second guiding member 5121 are located shields the gap. The second guide 52 is a metal sheet, and the second guide 52 is parallel to the line where the first guide member 5111 and the second guide member 5121 are located, that is, the square length of the second guide member 52 and the radiation unit 20 The sides, the long axis of the ellipse, or the straight sides of the racetrack are parallel. The second director 52 improves the gain of the antenna 1, reduces the side lobe, and improves the anti-interference ability of the antenna 1.

Please continue to refer to FIG. 1, the feed line 30 is used to feed the radiating unit 20, and the feed line 30 and the radiating unit 20 are located on the same surface of the substrate 10. The feed line 30 is electrically connected to the first end 21 of the half-wave folding vibrator. The feed line 30 is electrically connected to the external radio frequency front end. In this embodiment, the feeder line 30 is linear, and the feeder line 30 is perpendicular to the long side of the square, the long axis of the ellipse, or the linear side of the racetrack shape of the radiating unit 20.

1 and 4 together, the grounding assembly 40 includes a first grounding sheet 41, a second grounding sheet 42, and a third grounding sheet 43. The first grounding sheet 41, the second grounding sheet 42 and the radiating unit 20 are arranged on the substrate On the same surface of 10, the third radiating sheet is arranged on the surface of the substrate 10 opposite to the radiating unit 20. The first grounding plate 41 is electrically connected to the second end 22 of the half-wave folding vibrator, the feeder line 30 is located between the first grounding plate 41 and the second grounding plate 42, and the third grounding plate 43 is connected to the first grounding plate respectively. 41. The second ground sheet 42 is electrically connected. When the third ground sheet 43 is electrically connected to the first ground sheet 41 and the second ground sheet 42 respectively, they are electrically connected through a conductor. For example, if a plurality of metal pillars are used, the metal pillars pass through the substrate 10, and the two ends of the metal pillars are respectively connected to each other. The first ground sheet 41 and the third ground sheet are electrically connected, or the two ends of the metal column are electrically connected with the second ground sheet 42 and the third ground sheet respectively.

The performance of the above-mentioned antenna 1 is shown in Fig. 5, Fig. 6, Fig. 7 and Fig. 8. As can be seen from the figures, it has a relatively high gain.

Please refer to FIG. 9A and FIG. 9B together. The present invention also provides an antenna array 2 which includes at least two antennas 1 described above. In an embodiment, the antenna array 2 includes 1×2 or 1×3 antennas 1.

When the antenna array 2 includes 1×2 antennas 1, the performance of the antenna array 2 is shown in FIG. 10, FIG. 11, FIG. 12, and FIG.

When the antenna array 2 includes 1×3 antennas 1, the performance of the antenna array 2 is shown in FIG. 14, FIG. 15, FIG. 16, and FIG. 17.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

An antenna, characterized in that: the antenna comprises a substrate, a half-wave folding vibrator, a first director and a second director arranged on a surface of the substrate, the half-wave folding vibrator, the first The director and the second director are arranged at intervals, and the first director is located between the second director and the half-wave folding vibrator, and the shape of the half-wave folding vibrator has an opening The half-wave folding vibrator includes a first end and a second end opposite to each other. The first end is used for power feeding, and the second end is used for grounding.
The antenna according to claim 1, wherein the first guide includes a first guide member and a second guide member, and the first guide member and the second guide member are located in the same position. On a straight line, the first guide member and the second guide member are separated by a first distance, and a gap is formed between the first guide member and the second guide member.
3. The antenna according to claim 2, wherein the straight line on which the first guiding member and the second guiding member are located is parallel to the length direction of the half-wave folding vibrator.
The antenna according to claim 2, wherein the first guide further comprises a third guide member and a fourth guide member, and the third guide member is electrically connected to the first guide member. The third guide member is perpendicular to the first guide member, the fourth guide member is electrically connected to the second guide member, and the fourth guide member and the second guide member are electrically connected. To pieces are vertical.
The antenna according to claim 2, wherein the projection of the second guide on the straight line where the first guide member and the second guide member are located shields the gap.
3. The antenna according to claim 2, wherein the second guide is parallel to the line where the first guide and the second guide are located.
The antenna according to claim 2, wherein the half-wave reflex element is a square, elliptical or racetrack-shaped ring structure, and the straight line where the first guide member and the second guide member are located , Parallel to the long side of the square, the long axis of the ellipse, or the straight side of the racetrack shape.
The antenna according to claim 1, characterized in that: the antenna further comprises a first ground plate, a second ground plate and a feeder line, the first ground plate, the second ground plate, the feeder line and the half wave The folded vibrator is arranged on the same surface of the substrate, the feeder line is located between the first ground plate and the second ground plate, the feeder line is electrically connected to the first end, and the first The ground sheet is electrically connected to the second end.
8. The antenna according to claim 8, wherein the antenna further comprises a third ground plate, the third ground plate is disposed on the substrate and the surface opposite to the half-wave folding element, and the third ground plate The strips are electrically connected to the first ground strip and the second ground strip respectively.
An antenna array, characterized in that: the antenna array comprises 1×2 or 1×3 antennas according to any one of claims 1-9.