EP2889961A1

EP2889961A1 - Reflecting board of base station antenna, and base station antenna

Info

Publication number: EP2889961A1
Application number: EP13839361.6A
Authority: EP
Inventors: Jianping Zhao; Hongli Peng; Wei Luo; Ni Ma
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2012-09-18
Filing date: 2013-09-18
Publication date: 2015-07-01
Anticipated expiration: 2033-09-18
Also published as: EP2889961B1; CN202797292U; EP2889961A4; WO2014044194A1

Abstract

The present utility model relates to the field of communications technologies and discloses a reflection board of a base station antenna and the base station antenna that relate to the field of communications technologies. The reflection board of the base station includes a bottom board, a side board, and a step board, where the side board includes a first side board and a second side board that are opposite to each other, the first side board and the second side board are respectively disposed on two sides of the bottom board, the side board is connected to the step board, and the step board is in contact with the bottom board.

Description

TECHNICAL FIELD

The present utility model relates to the field of communications technologies, and in particular, to a reflection board of a base station antenna and a base station antenna.

BACKGROUND

A base station antenna is an important component of a device that is used to receive and spread an electromagnetic wave, and the base station antenna is a bridge of communication between a user terminal and a base station control device, and is widely applied to mobile communications and a wireless access communications system. The base station antenna includes a reflection board, a radiating element, and a feeding network, where the reflection board can improve a characteristic of an electromagnetic wave of a communications base station antenna, particularly a beam characteristic. Therefore, the reflection board is an important component of the base station antenna and plays a main role in determining a directivity pattern of the antenna.
Nowadays, a reflection board in the prior art includes a flat board tilted to a horizontal direction, where the tilted flat board may correspond to multiple resonance frequencies. Therefore, the tilted flat board may be applied to a multiband base station antenna (for example, a base station antenna on a frequency band of 806-960 MHz, 1710-2170 MHz, or the like), so that an operating frequency range (bandwidth) of the base station antenna is relatively wide. Meanwhile, a directivity pattern has a relatively good capability of maintaining a characteristic in a relatively wide bandwidth (that is, consistency of the directivity pattern is relatively good), but this structure of the reflection board may lead to a relatively large size of the base station antenna. In addition, for another reflection board in the prior art, a structure of the reflection board is a horizontal board. This reflection board has a relatively small size, but an operating frequency range (bandwidth) of a base station antenna is relatively narrow because the reflection board corresponds to one resonance frequency, so that the reflection board can only maintain consistency of a directivity pattern at the resonance frequency and within a nearby narrowband range, and cannot meet a requirement of multiband operations. Therefore, it can be seen from the foregoing descriptions that a reflection board has become one of bottlenecks that restrict further miniaturization of a size of a communications base station antenna and wideband application of the communications base station antenna.

SUMMARY

To solve the foregoing problem, embodiments of the present utility model provide a reflection board of a base station antenna and the base station antenna, which can enable the reflection board to have a relatively small size and a relatively wide bandwidth.
To achieve the foregoing objective, the embodiments of the present utility model use the following technical solutions:
According to one aspect, the present utility model provides a reflection board of a base station antenna, where the reflection board includes a bottom board, a side board, and a step board, where the side board includes a first side board and a second side board that are opposite to each other, the first side board and the second side board are respectively disposed on two sides of the bottom board, the side board is connected to the step board, and the step board is in contact with the bottom board.
Both the first side board and the second side board are connected to the step board.
Both the first side board and the second side board have a flap, and the flaps form a step relative to the step board and the bottom board.
Further, a flat board parallel to the side board is disposed at one end that is of the step board and connected to the side board.
Further, a third side board and a fourth side board are respectively disposed on another two sides of the bottom board; the first side board, the third side board, the fourth side board, and the step board form an enclosed structure; and the second side board, the third side board, the fourth side board, and the step board form an enclosed structure.
Further, partition boards perpendicular to the side board are disposed on the bottom board at intervals, and the partition boards divide an area between the first side board and the second side board into multiple areas.
Optionally, the partition boards are disposed on the bottom board at equal intervals.
In addition, the step board is a straight L-shaped board, an oblique L-shaped board, a straight step-shaped board, or an oblique step-shaped board.
Optionally, that the step board is disposed on the side board is that: the side board is connected to the step board by using a fastener; or the side board is connected to the step board by means of welding; or the side board is connected to the step board by using a buckle.
Optionally, that the step board is in contact with the bottom board is that: the bottom board is connected to the step board by using a fastener; or the bottom board is connected to the step board by means of welding; or the bottom board is connected to the step board by using a buckle.
According to another aspect, an embodiment of the present utility model further provides a base station antenna, including a feeding network, a radiating element, and the foregoing reflection board.
According to the reflection board of the base station antenna and the base station antenna provided in the embodiments of the present utility model, include a bottom board, a side board, and a step board, where the side board includes a first side board and a second side board that are opposite to each other, the first side board and the second side board are respectively disposed on two sides of the bottom board, the side board is connected to the step board, and the step board is in contact with the bottom board. In this way, on one hand, a size of the reflection board may be relatively small, and on the other hand, the step board and the bottom board may jointly form a step-shaped reflection board, so that a high-frequency electromagnetic wave may generate a resonance with a step at a relatively high location, and a low-frequency electromagnetic wave may generate a resonance with a step at a relatively low location. Therefore, a directivity pattern corresponding to the high-frequency electromagnetic wave may maintain a relatively consistent shape with a directivity pattern corresponding to the low-frequency electromagnetic wave. In addition, because there is a relatively wide range between the high-frequency electromagnetic wave and the low-frequency electromagnetic wave, the reflection board may have a relatively wide bandwidth.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments of the present utility model or in the prior art more clearly, the following briefly introduces the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show merely some embodiments of the present utility model, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts.

FIG. 1 is a schematic diagram of a reflection board of an antenna base station according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a bottom board in FIG. 1;
FIG. 3 is a schematic diagram of a first side board, a second side board, and a flat board in FIG. 1;
FIG. 4 is a schematic diagram of a step board in FIG. 1;
FIG. 5 is a directivity pattern corresponding to a reflection board of an antenna base station when operating frequency of the reflection board is 1.71 GHz according to an embodiment of the present utility model; and
FIG. 6 is a directivity pattern corresponding to a reflection board of an antenna base station when operating frequency of the reflection board is 2.69 GHz according to an embodiment of the present utility model.

Reference numerals:

1-bottom board, 2-step board, 3a-first side board, 3b-second side board, 30-flap, 4a-third side board, 4b-fourth side board, 5-flat board, and 6-partition board

DESCRIPTION OF EMBODIMENTS

The following clearly and completely describes the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present utility model. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
FIG. 1 to FIG. 4 show a specific embodiment of a reflection board of a base station antenna according to the present utility model. The reflection board of the base station includes a bottom board 1, a side board, and a step board 2, where the side board includes a first side board 3a and a second side board 3b that are opposite to each other, the first side board 3a and the second side board 3b are respectively disposed on two sides of the bottom board 1, the side board is connected to the step board 2, and the step board 2 is in contact with the bottom board 1.
The reflection board of the base station antenna provided in this embodiment of the present utility model includes a bottom board 1, a side board, and a step board 2, where the side board includes a first side board 3a and a second side board 3b that are opposite to each other, the first side board 3a and the second side board 3b are respectively disposed on two sides of the bottom board 1, the side board is connected to the step board 2, and the step board 2 is in contact with the bottom board 1. In this way, on one hand, a size of the reflection board may be relatively small, and on the other hand, the step board 2 and the bottom board 1 may jointly form a step-shaped reflection board, so that a high-frequency electromagnetic wave may generate a resonance with a step at a relatively high location, and a low-frequency electromagnetic wave may generate a resonance with a step at a relatively low location. Therefore, a directivity pattern corresponding to the high-frequency electromagnetic wave may maintain a relatively consistent shape with a directivity pattern generated by the low-frequency electromagnetic wave. In addition, because there is a relatively wide range between the high-frequency electromagnetic wave and the low-frequency electromagnetic wave, the reflection board may have a relatively wide bandwidth.
Referring to FIG. 1 and FIG. 4, both the first side board 3a and the second side board 3b are connected to the step board 2. In this way, it may further be ensured that the reflection board can maintain a relatively consistent directivity pattern in a relatively wide bandwidth, and a radiation characteristic of an electromagnetic wave is ensured.
It should be noted that, referring to FIG. 1 and FIG. 4, the first side board 3a and the second side board 3b may also have a flap 30, where the flap 30 forms a step relative to the step board 2 and the bottom board 1. In this way, the number of steps of the reflection board may further increase, thereby ensuring a radiation characteristic of an electromagnetic wave.
Still referring to FIG. 1 and FIG. 4, a flat board 5 parallel to the side board may be disposed at one end that is of the step board 2 and connected to the side board. In this way, a radiation characteristic of an electromagnetic wave of the reflection board in a relatively wide bandwidth may further be satisfied, where the flat board 5 may be installed on the step board 2 by using a fastener or a buckle, or may be installed on the step board 2 in a manner of welding or the like.
As shown in FIG. 1, a third side board 4a and a fourth side board 4b may also be respectively disposed on another two sides of the bottom board 1; the first side board 3a, the third side board 4a, the fourth side board 4b, and the step board 2 form an enclosed structure; and the second side board 3b, the third side board 4a, the fourth side board 4b, and the step board 2 form an enclosed structure. In this way, the first side board 3a, the second side board 3b, the third side board 4a, and the fourth side board 4b form a sealing board on the bottom board 1, and the sealing board can form an enclosed structure together with the step board 2 and the bottom board 1, which can better satisfy a radiation characteristic of an electromagnetic wave of the reflection board in a relatively wide bandwidth.
To satisfy an arrangement of an array antenna, partition boards 6 perpendicular to the side board may be disposed on the bottom board 1 at intervals, where the partition boards 6 divide an area between the first side board 3a and the second side board 3b into multiple areas. In this way, multiple areas for antenna arrangement may be formed on the reflection board, and antennas in neighboring areas may have better isolation, thereby avoiding mutual influence.
Optionally, the partition boards 6 may be disposed on the bottom board 1 at equal intervals, or may also be disposed on the bottom board 1 at unequal intervals.
In addition, the step board 2 may be a straight L-shaped board, an oblique L-shaped board, a straight step-shaped board, or an oblique step-shaped board. Optionally, the straight step-shaped board is used in this embodiment of the present utility model.
Optionally, that the step board 2 is disposed on the side board is that: the side board may be connected to the step board 2 by using a fastener; or the side board may be connected to the step board 2 by means of welding; or the side board may be connected to the step board 2 by using a buckle, which is not limited in this embodiment of the present utility model, and may also be another connection manner known to a person skilled in the art.
Similarly and optionally, that the step board 2 is in contact with the bottom board 1 is that: the bottom board 1 may be connected to the step board 2 by using a fastener; or the bottom board 1 may be connected to the step board 2 by means of welding; or the bottom board 1 may be connected to the step board 2 by using a buckle, which is not limited in this embodiment of the present utility model, and may also be another connection manner known to a person skilled in the art.
By using the foregoing solutions, the reflection board of the base station antenna may reach a size of 468 mm* 140 mm*40 mm. Specifically, a size of the bottom board 1 may be 454 mm* 120 mm* 1.5 mm; the first side board 3a and the second side board 3b are respectively disposed on two long edges of the bottom board 1, and both sizes of the first side board 3a and the second side board 3b may be 454*21.6 mm* 1.5 mm; a size of the flat board 5 parallel to the first side board 3a or the second side board 3b may be 418*21.6 mm*1.5 mm, and a spacing between the flat board 5 and the first side board 3a or the second side board 3b is 7 mm. Optionally, a thickness and a length of the straight step-shaped board may be 1.5 mm and 418 mm, respectively, the straight step-shaped board has three steps, and sizes of horizontal/vertical parts of the steps are 6 mm/15 mm, 6 mm/15 mm, and 6 mm/6 mm, respectively. A spacing between neighboring partition boards 6 may be 108 mm, and a length/width of each partition board 6 is 110 mm/16.2 mm. A reflection board in this embodiment of the present utility model may further cover an electromagnetic wave on multiple frequency bands within 1.71 to 2.69 GHz. FIG. 5 is a directivity pattern corresponding to 1.71 GHz, and FIG. 6 is a directivity pattern corresponding to 2.69 GHz. It can be seen from FIG. 5 and FIG. 6 that directivity patterns of electromagnetic waves on the two frequency bands are relatively similar. Therefore, this further illustrates that consistency of directivity patterns corresponding to high and low frequency bands is relatively high by using the reflection board in this embodiment of the present utility model.
An embodiment of the present utility model further provides a base station antenna, including a feeding network, a radiating element, and any one of the foregoing possible reflection boards.
Referring to FIG. 1 to FIG. 4 and according to the base station antenna provided in this embodiment of the present utility model, the side board in the reflection board is connected to the step board 2, and the step board 2 is in contact with the bottom board 1. In this way, on one hand, a size of the reflection board may be relatively small, and on the other hand, the step board 2 and the bottom board 1 may also jointly form a step-shaped reflection board, so that a high-frequency electromagnetic wave may generate a resonance with a step at a relatively high location, and a low-frequency electromagnetic wave may generate a resonance with a step at a relatively low location. Therefore, a directivity pattern corresponding to the high-frequency electromagnetic wave may maintain a relatively consistent shape with a directivity pattern corresponding to the low-frequency electromagnetic wave. In addition, because there is a relatively wide range between the high-frequency electromagnetic wave and the low-frequency electromagnetic wave, the reflection board may have a relatively wide bandwidth.
A specific structure of the reflection board of the base station antenna provided in this embodiment of the present utility model may be any one of the foregoing possible manners. Therefore, details are not described herein again.
The foregoing descriptions are merely specific implementation manners of the present utility model, but are not intended to limit the protection scope of the present utility model. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present utility model shall fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

A reflection board of a base station antenna, comprising a bottom board, a side board, and a step board, wherein the side board comprises a first side board and a second side board that are opposite to each other, the first side board and the second side board are respectively disposed on two sides of the bottom board, the side board is connected to the step board, and the step board is in contact with the bottom board.
The reflection board of the base station antenna according to claim 1, wherein both the first side board and the second side board are connected to the step board.
The reflection board of the base station antenna according to claim 2, wherein both the first side board and the second side board have a flap, and the flap forms a step relative to the step board and the bottom board.
The reflection board of the base station antenna according to claim 3, wherein a flat board parallel to the side board is disposed at one end that is of the step board and connected to the side board.
The reflection board of the base station antenna according to claim 4, wherein a third side board and a fourth side board are respectively disposed on another two sides of the bottom board; and
the first side board, the third side board, the fourth side board, and the step board form an enclosed structure; and the second side board, the third side board, the fourth side board, and the step board form an enclosed structure.
The reflection board of the base station antenna according to any one of claims 1 to 5, wherein partition boards perpendicular to the side board are disposed on the bottom board at intervals, and the partition boards divide an area between the first side board and the second side board into multiple areas.
The reflection board of the base station antenna according to claim 6, wherein the partition boards are disposed on the bottom board at equal intervals.
The reflection board of the base station antenna according to claim 7, wherein the step board is a straight L-shaped board, an oblique L-shaped board, a straight step-shaped board, or an oblique step-shaped board.
The reflection board of the base station antenna according to claim 1, wherein that the step board is disposed on the side board is that:
the side board is connected to the step board by using a fastener; or

the side board is connected to the step board by means of welding; or

the side board is connected to the step board by using a buckle.
The reflection board of the base station antenna according to claim 1, wherein that the step board is in contact with the bottom board is that:
the bottom board is connected to the step board by using a fastener; or

the bottom board is connected to the step board by means of welding; or

the bottom board is connected to the step board by using a buckle.
A base station antenna, comprising a feeding network, a radiating element, and the reflection board according to any one of claims 1 to 10.