WO2021128006A1

WO2021128006A1 - Antenna element and base station

Info

Publication number: WO2021128006A1
Application number: PCT/CN2019/127996
Authority: WO
Inventors: 吕洪辉
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: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-07-01

Abstract

Provided are an antenna element and a base station. The antenna element comprises a radiating assembly, and a first feeding assembly and a second feeding assembly which are connected to the radiating assembly, wherein the radiating assembly comprises a radiating substrate and a radiator arranged on the radiating substrate; the radiator comprises a first radiating patch and a second radiating patch, and a feed slot is arranged between the first radiating patch and the second radiating patch; the first feeding assembly comprises a first feeding substrate connected to the radiating substrate, and a first feed line and a first ground lug; a first clearance is formed between the first ground lug and the first radiating patch, the first ground lug and the first radiating patch form an electrical coupling, and the first ground lug is provided with a first coupling slot; the second feeding assembly comprises a second feeding substrate connected to the radiating substrate, and a second feed line and a second ground lug; and a second clearance is formed between the second ground lug and the second radiating patch, the second ground lug and the second radiating patch form an electrical coupling, and the second ground lug is provided with a second coupling slot.

Description

Antenna unit and base station

Technical field

The present invention relates to the field of communication technology, in particular to an antenna unit and a base station.

Background technique

Mobile communication technology will greatly change people's existing lifestyles and promote the continuous development of society. In the future, the mainstream communication frequency bands will be 4G and 5G. In order to adapt to the technical characteristics of future communication technologies such as high speed, low delay, and high capacity, the base station unit will also use more large-scale array antenna units, which will also be used for antennas. The element element puts forward higher requirements, and the miniaturized antenna element element will be greatly respected. However, if the existing antenna element is to be miniaturized, its radiation effect will become worse and the antenna bandwidth frequency band will be narrow.

Therefore, it is necessary to provide an antenna unit with a small size and good radiation effect to solve the above-mentioned problems.

technical problem

The purpose of the present invention is to provide an antenna unit and a base station with a small size and good radiation effect.

Technical solutions

The present invention provides an antenna unit, which includes a radiation component, a first feed component and a second feed component connected to the radiation component;

The radiation component includes a radiation substrate and a radiator arranged on the radiation substrate, wherein the radiator includes a first radiation patch arranged along a first direction and a second radiation patch arranged along a second direction, and the A feed gap is provided between the first radiation patch and the second radiation patch, and the first direction and the second direction are perpendicular to each other;

The first feeding assembly includes a first feeding substrate connected to the radiating substrate, and a first feeding line and a first ground plate provided on two opposite surfaces of the first feeding substrate, wherein the first A first gap is formed between a grounding plate and the first radiating patch, and is electrically coupled with the first radiating patch, and the first grounding plate is provided to form an electrical connection with the first feeder. The first coupling slot of coupling;

The second feeding assembly includes a second feeding substrate connected to the radiating substrate, and a second feeding line and a second ground plate provided on two opposite surfaces of the second feeding substrate, wherein the first A second gap is formed between the two grounding plates and the second radiating patch, and is electrically coupled with the second radiating patch, and the second grounding plate is provided for forming an electrical connection with the second feeder. The second coupling slot for coupling.

Preferably, the first coupling slot extends along the first direction, and the second coupling slot extends along the second direction.

Preferably, the first feeder line includes a first power feeder, a second power feeder electrically connected to the first power feeder, and a third power feeder electrically connected to the second power feeder, Wherein, the first power feeder is used for electrically connecting with an external power feeder substrate, the second power feeder extends along the first direction, the first power feeder and the third power feeder They are respectively arranged on opposite sides of the second power feeding part and are parallel to each other.

Preferably, the second feeder line includes a fourth power feeder, a fifth power feeder electrically connected to the fourth power feeder, and a sixth power feeder electrically connected to the fifth power feeder, Wherein, the fourth power feeder is used for electrically connecting with an external power feeder substrate, the fifth power feeder extends along the second direction, the fourth power feeder and the sixth power feeder They are respectively arranged on opposite sides of the fifth power feeding part and are parallel to each other.

Preferably, the first power feeding substrate is provided with a first limiting slot, and the second power feeding substrate is provided with a second limiting slot that forms a limiting fit with the first limiting slot;

After the first power feeding substrate passes through the first limiting slot and the second limiting slot to form a limiting fit, the first power feeding substrate and the second power feeding substrate are perpendicular to each other.

Preferably, the first feeding substrate includes a first body portion and a first fixing portion and a second fixing portion provided on opposite sides of the first body portion, wherein the first fixing portion is used for The radiating substrate is fixedly connected, and the second fixing portion is used to form a fixed connection with an external power feeding substrate;

The first limiting groove is provided on the first body portion and is provided on the same side as the first fixing portion.

Preferably, the second feeding substrate includes a second body portion, and a third fixing portion and a fourth fixing portion provided on opposite sides of the second body portion, wherein the third fixing portion is used for The radiating substrate is fixedly connected, and the fourth fixing portion is used to form a fixed connection with an external power feeding substrate;

The second limiting groove is provided on the second body portion and is provided on the same side as the fourth fixing portion.

Preferably, the polarization modes of the first radiation patch and the second radiation patch are orthogonal, and the antenna unit works in the 5G frequency band.

The present invention also provides a base station, which includes at least two of the aforementioned antenna units.

Preferably, the base station further includes a feeding substrate, and the antenna unit is fixed to the feeding substrate and electrically connected to a power division network provided on the feeding substrate.

Beneficial effect

Compared with the prior art, the antenna unit provided by the present invention provides a first coupling slot on the first ground plate and a second coupling slot on the second ground plate. Electromagnetic resonance occurs between the first coupling gap, the second feeder line, and the second coupling gap. The electromagnetic energy continues to be magnetically coupled through the first gap and the second gap to the first radiation patch and the second radiation patch Above, the formation of dual-polarized electromagnetic wave radiation.

Description of the drawings

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

2A is a schematic cross-sectional structure diagram of the radiating component of the antenna unit;

2B is a schematic diagram of the planar structure of the radiator of the radiating component;

3 is a schematic diagram of a three-dimensional structure of the cooperation of the first feeding component and the second feeding component of the antenna unit;

4A is a schematic diagram of a three-dimensional structure of the first power feeding assembly from a first perspective;

FIG. 4B is a schematic diagram of the three-dimensional structure of the first power feeding assembly from a second perspective; FIG.

FIG. 5 is a schematic diagram of the structure of the cooperation of the first feeding component and the radiating component;

FIG. 6A is a schematic diagram of a three-dimensional structure of a second power feeding assembly from a first perspective; FIG.

FIG. 6B is a schematic diagram of a three-dimensional structure of a second power feeding assembly from a second perspective; FIG.

FIG. 7 is a schematic diagram of the structure of the cooperation of the second feeding component and the radiating component;

FIG. 8 is a schematic diagram of a three-dimensional structure of a base station provided by an embodiment of the present invention;

FIG. 9 is a curve diagram of standing wave ratio of a base station 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.

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.

1, the present invention provides an antenna unit 1 that can work in a 5G frequency band, and the 5G frequency band includes at least one of the 3400-3800MHz frequency band, the 2500-2700MHz frequency band, or the 4800-5000MHz frequency band.

The antenna unit 1 includes a radiating component 2, a first feeding component 3 and a second feeding component 4 connected to the radiating component 2 and feeding the radiating component 2.

2A-2B, the radiation component 2 includes a radiation substrate 21 and a radiator 22 disposed on the radiation substrate 21. The radiating substrate 21 is used to provide a carrier base for the radiator 22. The radiator 22 includes a first radiation patch 221 arranged in a first direction and a second radiation patch 222 arranged in a second direction, and a power feed is provided between the first radiation patch 221 and the second radiation patch 222 For the slit 223, the first direction and the second direction are perpendicular to each other.

Specifically, the first radiation patch 221 is two pieces and is arranged axisymmetrically about the axis of symmetry L2, and the second radiation patch 223 is two pieces and is arranged axisymmetrically about the axis of symmetry L1. A feeding slot 223 is provided between each first radiating patch 221 and the adjacent second radiating patch 222 to adjust the impedance matching of the antenna unit 1.

Preferably, the first radiating patch 221 and the second radiating patch 222 are disposed on the surface of the radiating substrate 21 that is close to the surface of the radiating substrate 21 that is matched with the first feeding element 3 and the second feeding element 4.

Preferably, the polarization modes of the first radiation patch 221 and the second radiation patch 222 are orthogonal,

Referring to FIGS. 3-7, the first feeding assembly 3 includes a first feeding substrate 31 connected to the radiating substrate 21, and a first feeding line 32 and a first ground plate disposed on two opposite surfaces of the first feeding substrate 31 33. Wherein, a first gap 224 is formed between the first ground plate 33 and the first radiating patch 221, and is electrically coupled with the first radiating patch 221, and the first ground plate 33 is provided with a first feed line 32 forms a first coupling slot 331 for electrical coupling.

Preferably, the first coupling slit 331 extends along the first direction.

The second feeder assembly 4 includes a second feeder substrate 41 connected to the radiating substrate 21, and a second feeder 42 and a second ground plate 43 that are provided on two opposite surfaces of the second feeder substrate 41, wherein the second ground A second gap 225 is formed between the sheet 43 and the second radiating patch 222, and is electrically coupled with the second radiating patch 222, and the second ground sheet 43 is provided with a second coupling for forming an electrical coupling with the second feeder 42 Gap 431.

Preferably, the second coupling slot 431 extends along the second direction.

The feeding structure is provided with a first coupling slot 331 through the first ground plate 33, and a second coupling slot 431 is provided at the second ground plate 43. When the external feed substrate feeds the antenna unit 1, the first feed line 32 is connected to one Polarized port, the second feeder 42 is connected to another polarized port.

During power feeding, electromagnetic resonance occurs between the first feeder line 32 and the first coupling slot 331, the second feeder line 42 and the second coupling slot 431, and the electromagnetic energy continues to be magnetically coupled through the first gap 224 and the first gap. The two gaps 225 are coupled to the first radiation patch 221 and the second radiation patch 222 of the radiator 22 to form dual-polarized electromagnetic wave radiation.

As shown in FIG. 4A, specifically, the first feeder line 32 includes a first power feeder 321, a second power feeder 322 electrically connected to the first power feeder 321, and a second power feeder 322 electrically connected to the second power feeder 322. Three power feeders 323, wherein the first power feeder 321 is used to electrically connect to a power feed port of the external power feeder substrate, the second power feeder 322 extends along the first direction, the first power feeder 321 and the second power feeder The three power feeding parts 323 are respectively disposed on opposite sides of the second power feeding part 322 and are parallel to each other.

As shown in FIG. 6A, specifically, the second feeder 42 includes a fourth power feeder 421, a fifth power feeder 422 electrically connected to the fourth power feeder 421, and a second power feeder 422 electrically connected to the fifth power feeder 422. Six power feeders 423, in which the fourth power feeder 421 is used to electrically connect to another power feed port of the external power feeder substrate, the fifth power feeder 422 extends in the second direction, and the fourth power feeder 421 and The sixth power feeding portions 423 are respectively disposed on opposite sides of the fifth power feeding portion 422 and are parallel to each other.

In some embodiments, any one of the second power feeding portion 322 or the fifth power feeding portion 422 is bent to the side away from the radiation component 2, that is, the bending opening formed after bending is located far away from the radiation component 2 side.

In some embodiments, the first power feeding substrate 31 and the second power feeding substrate 41 are vertically connected to each other. Specifically, the first power feeding substrate 31 is provided with a first limiting slot 314, and the second power feeding substrate 41 is provided with and The first limiting slot 314 forms a limiting matching second limiting slot 414; when the first feeding substrate 31 passes through the first limiting slot 314 and forming a limiting matching with the second limiting slot 414, the first feeding substrate 31 and the second feeding substrate 41 are perpendicular to each other.

In some embodiments, the connection mode of the radiating component 2 and the first feeding component 3 is specifically as follows:

The first feeding substrate 31 includes a first body portion 311, and a first fixing portion 312 and a second fixing portion 313 disposed on opposite sides of the first body portion 311, wherein the first fixing portion 312 is used to interact with the radiation substrate 21 For fixed connection, the second fixing portion 313 is used to form a fixed connection with an external power feeding substrate; the first limiting slot 314 is provided on the first body portion 311 and is provided on the same side as the first fixing portion 312.

By providing a first fixing hole matching the first fixing portion 312 on the radiating substrate 21, the first fixing portion 312 and the first fixing hole can cooperate to realize the fixing of the first feeding substrate 31 to the radiating substrate 21.

In some embodiments, the connection mode of the radiating component 2 and the second feeding component 4 is specifically as follows:

The second feeding substrate 41 includes a second body portion 411, and a third fixing portion 412 and a fourth fixing portion 413 provided on opposite sides of the second body portion 411, wherein the third fixing portion 412 is used to interact with the radiating substrate 21 For fixed connection, the fourth fixing portion 413 is used to form a fixed connection with the external power feeding substrate; the second limiting slot 414 is provided on the second body portion 411 and is provided on the same side as the fourth fixing portion 413.

The second fixing hole that cooperates with the third fixing portion 412 is provided on the radiating substrate 21, and the second feeding substrate 41 can be fixed to the radiating substrate 21 by the cooperation of the third fixing portion 412 and the second fixing hole.

Referring to FIG. 8, the present invention also provides a base station 10, the base station 10 includes a feeder substrate 5 and antenna units 1 fixed to the feeder substrate 5, wherein there are at least two antenna units 1.

Specifically, the feed substrate 5 includes a substrate 51 and a power division network 52 disposed on the substrate 51, and the antenna unit 1 is fixed on the substrate 51 and is electrically connected to the power division network 52.

Preferably, there are 4 antenna elements in the base station 10, and every two antenna element groups 1 form a 1×2 radiation sub-array.

The performance of the aforementioned base station 10 is shown in FIG. 9.

It should be noted that the above are only examples and do not limit the technical solutions of the present invention.

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 are all protected by the present invention. range.

Claims

An antenna unit, characterized in that the antenna unit includes a radiating component, a first feeding component and a second feeding component connected to the radiating component;

The radiation component includes a radiation substrate and a radiator arranged on the radiation substrate, wherein the radiator includes a first radiation patch arranged along a first direction and a second radiation patch arranged along a second direction, and the A feed gap is provided between the first radiation patch and the second radiation patch, and the first direction and the second direction are perpendicular to each other;

The first feeding assembly includes a first feeding substrate connected to the radiating substrate, and a first feeding line and a first ground plate provided on two opposite surfaces of the first feeding substrate, wherein the first A first gap is formed between a grounding plate and the first radiating patch, and is electrically coupled with the first radiating patch, and the first grounding plate is provided to form an electrical connection with the first feeder. The first coupling slot of coupling;

The second feeding assembly includes a second feeding substrate connected to the radiating substrate, and a second feeding line and a second ground plate provided on two opposite surfaces of the second feeding substrate, wherein the first A second gap is formed between the two grounding plates and the second radiating patch, and is electrically coupled with the second radiating patch, and the second grounding plate is provided for forming an electrical connection with the second feeder. The second coupling slot for coupling.
5. The antenna unit of claim 1, wherein the first coupling slot extends along the first direction, and the second coupling slot extends along the second direction.
The antenna unit of claim 1, wherein the first feeder line includes a first feeder, a second feeder electrically connected to the first feeder, and a second feeder connected to the second feeder. The third power feeder is electrically connected to the electrical part, wherein the first power feeder is used for electrical connection with an external power feeder substrate, the second power feeder extends along the first direction, and the first power feeder The power feeder and the third power feeder are respectively disposed on opposite sides of the second power feeder and are parallel to each other.
The antenna unit of claim 1, wherein the second feeder line includes a fourth feeder, a fifth feeder electrically connected to the fourth feeder, and a fifth feeder connected to the fifth feeder. The sixth power feeder electrically connected to the electrical part, wherein the fourth power feeder is used for electrical connection with an external power feeder substrate, the fifth power feeder extends along the second direction, and the fourth power feeder The power feeder and the sixth power feeder are respectively disposed on opposite sides of the fifth power feeder and are parallel to each other.
The antenna unit of claim 1, wherein the first feeding substrate is provided with a first limiting slot, and the second feeding substrate is provided with a limiting fit with the first limiting slot The second limit slot;

After the first power feeding substrate passes through the first limiting slot and the second limiting slot to form a limiting fit, the first power feeding substrate and the second power feeding substrate are perpendicular to each other.
5. The antenna unit of claim 5, wherein the first feeding substrate includes a first body portion, and a first fixing portion and a second fixing portion disposed on opposite sides of the first body portion, Wherein, the first fixing portion is used for fixed connection with the radiating substrate, and the second fixing portion is used for forming a fixed connection with an external power feeding substrate;

The first limiting groove is provided on the first body portion and is provided on the same side as the first fixing portion.
5. The antenna unit of claim 5, wherein the second feed substrate includes a second body portion, and a third fixing portion and a fourth fixing portion disposed on opposite sides of the second body portion, Wherein, the third fixing portion is used for fixed connection with the radiating substrate, and the fourth fixing portion is used for forming a fixed connection with an external power feeding substrate;

The second limiting groove is provided on the second body portion and is provided on the same side as the fourth fixing portion.
5. The antenna unit of claim 1, wherein the polarization modes of the first radiation patch and the second radiation patch are orthogonal, and the antenna unit operates in a 5G frequency band.
A base station, characterized in that: the base station includes at least two antenna units according to any one of claims 1-8.
9. The base station according to claim 9, wherein the base station further comprises a feeding substrate, and the antenna unit is fixed to the feeding substrate and electrically connected to a power division network provided on the feeding substrate.