WO2021258705A1

WO2021258705A1 - High-frequency radiation unit, multi-frequency coaxial radiation device, and antenna

Info

Publication number: WO2021258705A1
Application number: PCT/CN2020/141605
Authority: WO
Inventors: 王强; 姚化山
Original assignee: 京信通信技术(广州)有限公司
Priority date: 2020-06-24
Filing date: 2020-12-30
Publication date: 2021-12-30
Also published as: CN212162060U

Abstract

The present application provides a high-frequency radiation unit, a multi-frequency coaxial radiation device, and an antenna. The key points of the technical solution are that the high-frequency radiation unit comprises a support balun, a high-frequency reflection plate, and two pairs of high-frequency radiation arms; the two pairs of high-frequency radiation arms are disposed on the support balun, and are polarized and orthogonal; the high-frequency reflection plate is connected onto the support balun, and is located below the high-frequency radiation arm. The support balun is provided with the high-frequency reflection plate, and the reflection boundary of the high-frequency radiation unit is independent from and not related to a low-frequency radiation unit. When the high-frequency radiation unit and the low-frequency radiation unit are mutually nested, the high-frequency reflection boundary is not required to be arranged on the low-frequency radiation unit, which simplifies the structure of the low-frequency radiation unit and improves the assembly efficiency.

Description

High-frequency radiation unit, multi-frequency coaxial radiation device and antenna

Technical field

This application relates to the field of mobile communication technology, and in particular to a high-frequency radiation unit, a multi-frequency coaxial radiation device and an antenna.

Background technique

With the development of mobile communication networks, the demand for frequency bands continues to increase. Multi-frequency and multi-polarization to meet the common site and sharing of base station antennas has become a development trend. The corresponding base station antennas need to meet the requirements of integrating multiple frequency bands into one antenna to satisfy each operation. Business or multiple operators’ co-construction and sharing requirements. In the era of 5G networks, one antenna is usually required to integrate all 4G network standard antennas, and multiple antenna arrays are set in the antenna. 15-band 30-port antennas were born in this context and have been introduced to the market with more frequency bands. Antennas with more ports have become a development trend. In order to realize the layout of multiple arrays in a limited space, different frequency bands need to be nested coaxially to achieve spatial multiplexing, and the high-frequency radiating unit is embedded in the low-frequency radiating unit to maximize the use of the limited space.

The low-frequency radiation unit is part of the boundary of the high-frequency radiation unit. In order to achieve the design of high-frequency radiation indicators, the high-frequency radiation unit is raised relative to the reflector. Therefore, the high-frequency radiation unit needs to use a support base or the low-frequency radiation unit to set a boss for The high-frequency radiation unit is fixed, and the high-frequency reflection boundary needs to be set inside the low-frequency radiation unit. Therefore, the coaxially arranged high- and low-frequency radiation unit has a complicated structure and is composed of multiple parts and the assembly efficiency is low.

Application content

The primary purpose of this application is to provide a high-frequency radiation unit provided with a high-frequency reflector to simplify the structure of the low-frequency radiation unit.

Another objective of the present application is to provide a multi-frequency coaxial radiation device using the above-mentioned high-frequency radiation unit.

Another objective of the present application is to provide an antenna using the above-mentioned multi-frequency coaxial radiation device.

In order to achieve the above objectives, this application provides the following technical solutions:

A high-frequency radiation unit includes a supporting balun, a high-frequency reflector, and two pairs of high-frequency radiation arms. The two pairs of high-frequency radiation arms are arranged on the supporting balun and are polarized orthogonally. The board is connected to the supporting balun and is located under the high-frequency radiation arm.

Further arrangement: the high-frequency reflector is provided with a positioning hole for the supporting balun to pass through, the supporting balun is provided with a connecting part that abuts the high-frequency reflector, and the connecting part is provided with a The high-frequency reflector is positioned and installed in the mounting hole, and the high-frequency reflector is fixed to the supporting balun through the mounting hole and the high-frequency reflector by means of fasteners.

It is further provided that the two opposite side walls of the supporting balun protrude to form positioning parts that can pass through the positioning holes.

It is further provided that the outer periphery of the high-frequency reflector is vertically folded toward the direction of the high-frequency radiation arm to form a side plate.

It is further provided that the height of the high-frequency radiating arm relative to the bottom of the supporting balun is 0.25 to 0.5 times the wavelength of the center frequency point of the working frequency band of the high-frequency radiating unit, and the high-frequency reflector is opposite to the bottom of the supporting balun. The height of is 0.1 to 0.25 times the wavelength of the center of the working frequency band of the high-frequency radiation unit.

The present application also provides a multi-frequency coaxial radiation device. The high-frequency radiation unit further includes a low-frequency radiation unit, the high-frequency radiation unit is nested in the low-frequency radiation unit, and the high-frequency radiation unit The radiation surface of is higher than the radiation surface of the low-frequency radiation unit.

The present application also provides an antenna, which includes the above-mentioned multi-frequency coaxial radiation device, and also includes an antenna reflector and a feeder network. The feeder network includes a phase shifter fixed to the antenna reflector. The frequency coaxial radiation device and the phase shifter are separately arranged on the front and back sides of the antenna reflector and electrically connected

Further arrangement: the antenna reflector is provided with an escape hole for the support balun to pass through, the support balun passes through the escape hole and is fixed to the cavity of the phase shifter, the The high-frequency radiating unit includes a high-frequency feed piece that extends along the supporting balun and passes through the antenna reflector to be electrically connected to a phase shift circuit in the phase shifter cavity.

Further setting: the antenna includes a multi-frequency radiating array, the multi-frequency radiating array includes a plurality of the multi-frequency coaxial radiating devices, and the distance between two adjacent multi-frequency coaxial radiating devices is 0.8 of the low-frequency radiating unit To 1 times the wavelength.

A further arrangement: a high-frequency radiator is further provided between two adjacent multi-frequency coaxial radiation devices, and the working frequency band of the high-frequency radiator is the same as the working frequency band of the high-frequency radiation unit.

Compared with the prior art, the solution of this application has the following advantages:

1. In the high-frequency radiation unit involved in this application, by setting the high-frequency reflector on the supporting balun, the reflection boundary of the high-frequency radiation unit is independent of the low-frequency radiation unit, and the high-frequency radiation unit and the low-frequency radiation unit are embedded in each other. When it is set, there is no need to set a high-frequency reflection boundary on the low-frequency radiating unit, which simplifies the structure of the low-frequency radiating unit and improves the assembly efficiency.

2. In the multi-frequency coaxial radiation device involved in this application, by using the above-mentioned high-frequency radiation unit, the structure of the coaxial spatial multiplexing of the high-frequency radiation unit and the low-frequency radiation unit is simplified, and the complexity of component composition and assembly is reduced .

3. In the antenna designed in this application, by using the above-mentioned multi-frequency coaxial radiation device, the supporting balun of the high-frequency radiation unit can pass through the antenna reflector and connect to the feed network on the back of the antenna reflector, which simplifies the feeding of the radiation unit. The electrical switching structure reduces the loss and improves the gain of the antenna.

The additional aspects and advantages of the present application will be partially given in the following description, which will become obvious from the following description, or be understood through the practice of the present application.

Description of the drawings

The above and/or additional aspects and advantages of the present application will become obvious and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of an exploded structure of an antenna in an embodiment of the application;

Fig. 2 is an enlarged schematic diagram of A in Fig. 1;

Figure 3 is a side view of the antenna in an embodiment of the application;

FIG. 4 is a schematic diagram of the structure of an antenna in an embodiment of this application.

detailed description

As shown in FIGS. 1 to 3, the present application provides a high-frequency radiation unit 11, which includes a supporting balun 111, a high-frequency radiation arm 112, and a high-frequency reflector 113. Specifically, the supporting balun 111 is provided with There are two pairs of the high-frequency radiation arms 112 with orthogonal polarizations, and the high-frequency reflector 113 is connected to the supporting balun 111 and is located below the high-frequency radiation arms 112.

By setting the high-frequency reflector 113 on the supporting balun 111, the reflection boundary of the high-frequency radiation unit 11 is independent of the low-frequency radiation unit 12. When the high-frequency radiation unit 11 and the low-frequency radiation unit 12 are nested, there is no need to The radiation unit 12 is provided with a high-frequency reflection boundary, which simplifies the structure of the low-frequency radiation unit 12 and improves the assembly efficiency.

Further, the high-frequency reflector 113 is provided with a positioning hole 1131 for the supporting balun 111 to pass through, and the supporting balun 111 is provided with a connecting portion 1111 that abuts against the high-frequency reflector 113, so The connecting portion 1111 is provided with a mounting hole 11111 for positioning and installing the high-frequency reflector 113, and the high-frequency reflector 113 is fixed to the supporting balun 111 through the mounting hole 11111 and the high-frequency reflector 113 by means of fasteners.

By opening positioning holes 1131 on the high-frequency reflector 113, the high-frequency reflector 113 can be sleeved from the bottom of the supporting balun 111 to the supporting balun 111, and the high-frequency reflecting plate 113 is fixed to the connecting portion 1111 by fasteners Therefore, the fixing of the high-frequency reflector 113 and the supporting balun 111 is realized, the assembly structure is simple, the installation difficulty is low, and the assembly efficiency is improved.

Further, two opposite side walls of the supporting balun 111 protrude to form positioning portions 1112 that can pass through the positioning hole 1131. Specifically, the shape of the mounting hole 11111 corresponds to the outer wall structure of the supporting balun 111 Make a hole. By providing the positioning portion 1112 on the supporting balun 111, the contact area between the high-frequency reflecting plate 113 and the supporting balun 111 is increased, and the relative rotation of the high-frequency reflecting plate 113 and the supporting balun 111 can also be restricted, thereby increasing the high frequency The connection between the reflecting plate 113 and the supporting balun 111 is reliable.

Furthermore, the outer periphery of the high-frequency reflector 113 is vertically folded toward the high-frequency radiation arm 112 to form a side plate 1132. By bending the side plate 1132, the reflection effect of high frequency signals is further improved, and the mutual interference between high and low frequency signals is reduced.

Further, the height of the high-frequency radiation arm 112 relative to the bottom of the supporting balun 111 is 0.25 to 0.5 times the wavelength of the center frequency of the working frequency band of the high-frequency radiation unit 11, and the high-frequency reflector 113 is opposite to the The height of the bottom of the supporting balun 111 is 0.1 to 0.25 wavelengths of the center of the working frequency band of the high-frequency radiation unit 11. Specifically, the high-frequency reflector 113 is arranged at about half of the height of the supporting balun 111, so that the high-frequency reflector 113 and the high-frequency radiation arm 112 are kept at a proper distance to provide a suitable reflection effect for the high-frequency signal.

The present application also provides a multi-frequency coaxial radiation device 1, which includes the above-mentioned high-frequency radiation unit 11 and also includes a low-frequency radiation unit 12, and the high-frequency radiation unit 11 is nested in the low-frequency radiation unit 12. Preferably, the supporting balun 111 passes through an area defined by the bottom of the low-frequency radiation unit 12, and the radiation surface of the high-frequency radiation unit 11 is higher than the radiation surface of the low-frequency radiation unit 12. Specifically, the bottom of the low-frequency radiation unit 12 is provided with an escape hole 121 for the supporting balun 111 to pass through.

By adopting the above-mentioned high-frequency radiation unit 11, the structure of the coaxial spatial multiplexing of the high-frequency radiation unit 11 and the low-frequency radiation unit 12 is simplified, and the complexity of component composition and assembly is reduced. In addition, the supporting balun 111 of the high-frequency radiation unit 11 can directly pass through the bottom of the low-frequency radiation unit 12, and the high-frequency radiation surface is higher than the low-frequency radiation surface, which reduces the mutual interference between high and low frequency radiation signals, and the high-frequency radiation unit The supporting balun 111 of 11 passes through the bottom of the low-frequency radiating unit 12, and there is no need to raise the high-frequency radiating surface by setting a boss on the low-frequency radiating unit 12, which further simplifies the structure of the low-frequency radiating unit 12 and reduces the low-frequency radiating unit 12 and the high-frequency radiation unit 11 are difficult to assemble, which improves the assembly efficiency.

The present application also provides an antenna, including the above-mentioned multi-frequency coaxial radiating device 1, further comprising an antenna reflector 2 and a feeder network 3. The multi-frequency coaxial radiating device 1 and the feeder network 3 are separately arranged in On the front and back sides of the antenna reflector 2, the feed network 3 includes a phase shifter 31 connected to the antenna reflector 2. The phase shifter 31 includes a cavity 311 and is installed in the cavity 311的phase-shifting network 312.

Specifically, the antenna reflector 2 is provided with an avoidance hole 21 for the supporting balun 111 to pass through. The supporting balun 111 passes through the avoidance hole 21 and interacts with the cavity of the phase shifter 31. 311 is fixed, the high-frequency radiation unit 11 includes a high-frequency feed piece 114, the high-frequency feed piece 114 extends along the supporting balun 111 and passes through the antenna reflector 2 and the phase shifter The phase shift network 312 in the cavity 311 of 31 is electrically connected to feed the high-frequency radiation arm 112.

By using the above-mentioned multi-frequency coaxial radiation device 1, the supporting balun 111 of the high-frequency radiation unit 11 can pass through the antenna reflector 2 to connect to the feed network 3 on the back of the antenna reflector 2, which simplifies the feed switch of the radiation unit The structure reduces the loss and improves the gain of the antenna. In addition, the supporting balun 111 of the high-frequency radiating unit 11 is directly connected to the cavity 311 of the phase shifter 31 without being fixed by the low-frequency radiating unit 12, which simplifies the complexity of antenna assembly.

In this embodiment, the antenna reflector 2 is also provided with positioning through holes 22 for the positioning and installation of the low-frequency radiation unit 12. Specifically, in this embodiment, the antenna reflector 2 surrounds the avoidance holes 21 Three positioning through holes 22 are provided, and the low-frequency radiation unit 12 is correspondingly provided with a protruding structure that can pass through the positioning through holes 22.

As shown in FIG. 4, further, the antenna includes a multi-frequency radiating array, the multi-frequency radiating array includes a plurality of the multi-frequency coaxial radiating devices 1, between two adjacent multi-frequency coaxial radiating devices 1 The distance between is 0.8 to 1 times the wavelength of the low-frequency radiation unit 12, and a high-frequency radiator 4 is also provided between the two adjacent multi-frequency coaxial radiation devices 1, and the working frequency band of the high-frequency radiator 4 is equal to The working frequency bands of the high-frequency radiation units 11 are the same.

In this embodiment, only one column of multi-frequency radiating array structure is shown. In other embodiments, multiple columns of multi-frequency radiating arrays can also be provided on the antenna reflector 2. By adopting the above-mentioned arrangement and distribution method, it not only combines the way that the high-frequency radiation unit 11 and the low-frequency radiation unit 12 are nested with each other, but also can reasonably set a high-frequency radiator between two adjacent multi-frequency coaxial radiation devices 1 4. While satisfying multi-frequency bands and high performance, it also makes the antenna develop towards miniaturization.

Claims

A high-frequency radiation unit, which is characterized in that it includes a supporting balun, a high-frequency reflector, and two pairs of high-frequency radiation arms. The two pairs of high-frequency radiation arms are arranged on the supporting balun and are polarized orthogonally. The high-frequency reflector is connected to the supporting balun and is located below the high-frequency radiation arm.
The high-frequency radiation unit according to claim 1, characterized in that: the high-frequency reflector is provided with positioning holes for the supporting balun to pass through, and the supporting balun is provided with the high-frequency reflector. Abutting connecting part, the connecting part is provided with a mounting hole for positioning and installing the high-frequency reflector, and the high-frequency reflector is fixed to the supporting balun through the mounting hole and the high-frequency reflector by means of a fastener.
The high-frequency radiation unit according to claim 2, wherein the two opposite side walls of the supporting balun protrude to form positioning parts that can pass through the positioning holes.
The high-frequency radiation unit according to claim 1, wherein the outer periphery of the high-frequency reflector is vertically folded toward the high-frequency radiation arm to form a side plate.
The high-frequency radiating unit according to claim 1, wherein the height of the high-frequency radiating arm relative to the bottom of the supporting balun is 0.25 to 0.5 times the wavelength of the center frequency of the working frequency band of the high-frequency radiating unit, The height of the high-frequency reflector relative to the bottom of the supporting balun is 0.1 to 0.25 wavelengths of the center of the working frequency band of the high-frequency radiation unit.
A multi-frequency coaxial radiation device, characterized in that it comprises the high-frequency radiation unit according to any one of claims 1 to 5, and further comprises a low-frequency radiation unit, and the high-frequency radiation unit is nested in the low-frequency radiation In the unit, the radiation surface of the high-frequency radiation unit is higher than the radiation surface of the low-frequency radiation unit.
An antenna, characterized in that it comprises the multi-frequency coaxial radiation device according to claim 6, comprising an antenna reflector and a feed network, the feed network comprising a phase shifter fixed to the antenna reflector, The multi-frequency coaxial radiation device and the phase shifter are separately arranged on the front and back sides of the antenna reflector and electrically connected.
The antenna according to claim 7, wherein the antenna reflector is provided with an escape hole for the support balun to pass through, and the support balun passes through the escape hole and interacts with the The cavity of the phase shifter is fixed, and the high-frequency radiation unit includes a high-frequency feed piece that extends along the supporting balun and passes through the antenna reflector and the phase shifter The phase shift circuit in the cavity is electrically connected.
The antenna according to claim 8, characterized in that it comprises a multi-frequency radiation array, said multi-frequency radiation array comprises a plurality of said multi-frequency coaxial radiating devices, and the distance between two adjacent multi-frequency coaxial radiating devices is The spacing is 0.8 to 1 times the wavelength of the low-frequency radiation unit.
The antenna according to claim 9, characterized in that: a high-frequency radiator is further provided between two adjacent multi-frequency coaxial radiating devices, and the working frequency band of the high-frequency radiator is consistent with the high-frequency radiation. The working frequency band of the unit is the same.