WO2018094988A1

WO2018094988A1 - Phase balancing unit and power divider circuit phase balancing apparatus

Info

Publication number: WO2018094988A1
Application number: PCT/CN2017/085508
Authority: WO
Inventors: 陈礼涛; 高彬; 刘培涛; 苏国生
Original assignee: 京信通信技术(广州)有限公司; 京信通信系统（中国）有限公司; 天津京信通信系统有限公司
Priority date: 2016-11-25
Filing date: 2017-05-23
Publication date: 2018-05-31
Also published as: CN106384891A

Abstract

Provided in the present invention is a phase balancing unit, comprising an input port, a plurality of output ports, and a power divider circuit; the power divider circuit comprises a main circuit connected to the input port and a plurality of output branch circuits connected to the main circuit and connected to the output ports on a one-to-one basis, at least one output branch circuit being provided with a coupling transmission wire for modifying signal phases. By means of arranging a coupling transmission wire on at least one output branch circuit of the power divider circuit, the present invention changes the phase delay length of different frequency bands, and thereby achieves the objective of improving the phase dispersion of the input port to each output port in certain frequency bands. Also provided is a power divider circuit phase balancing apparatus employing the present phase balancing unit.

Description

Phase balance unit and power divider circuit phase balance device

Technical field

The present invention relates to the field of mobile communications, and in particular, to a phase balancing unit and a power divider circuit phase balancing device using the phase balancing unit.

Background technique

In the coverage of mobile communication networks, the base station antenna is one of the key devices covering the network. The main role of the base station antenna is signal coverage, and the direction indicator for signal coverage is particularly important.

In the base station antenna, the base station antenna is divided into an electric adjustment base station antenna and a non-electrical adjustment base station antenna. However, regardless of whether the base station antenna can be electrically adjusted, the power dividers are required, and the only difference is that the phase is adjustable or not adjustable.

Furthermore, in distributed circuits, the ratio of the size of the circuit to the operating wavelength is substantially close. Moreover, in order to place the RF circuit in a limited space, the power splitter is physically unable to make each output port symmetrical, which results in the dispersion of the phase from the input port to each output port, and this dispersion As the number of power series circuits increases, the phase dispersion is also related to the width of the frequency band. The wider the frequency band, the more difficult the dispersion is to control. When the dispersion is too large, the radiation performance of the antenna will be seriously affected.

Summary of the invention

A primary object of the present invention is to provide a phase balancing unit that facilitates solving the problem of phase dispersion between different output ports of a power divider circuit.

Another object of the present invention is to provide a power divider circuit phase balancing apparatus using the above phase balancing unit.

In order to solve the above problems, the present invention provides a phase balancing unit including an input port, a plurality of output ports, and a power splitter circuit; the power splitter circuit includes a main circuit connected to the input port and connected to the main circuit And one-to-one corresponding to a plurality of output branches connecting the output ports, And at least one of the output branches is provided with a coupled transmission line for changing the phase of the signal.

Preferably, the coupled transmission line is a pair of parallel and mutually adjacent transmission lines folded by the output branch pair. Preferably, the distance between the two transmission lines is less than 1/50 of the central operating wavelength λ.

Preferably, the power splitter circuit is composed of a plurality of splitters or a plurality of splitters connected in series or in parallel.

Preferably, a plurality of the output branches are provided with coupled transmission lines, and the distances of the two transmission lines of each pair of coupled transmission lines are equal or unequal.

Preferably, a plurality of the output branches are provided with coupled transmission lines, and the lengths of the plurality of coupled transmission lines are equal or unequal.

A power divider circuit phase balancing device includes a housing, an input connector disposed on the housing, a plurality of output connectors, and a phase balancing unit disposed in the housing, wherein the phase balancing unit is the phase balancing unit; The input port is connected to the input connector, and the output port is connected to the output connector one by one.

Further, the coupled transmission line is partially or entirely covered by a fixed dielectric element.

Further, the main circuit is partially or entirely covered by a removable medium element, and the movable medium element is movable along the main circuit.

Preferably, the input joint and the output joint are disposed on one side wall or different side walls of the outer casing.

A power divider circuit phase balance device includes a dielectric substrate and a phase balance unit disposed on the dielectric substrate, the two forming a microstrip line, and the phase balance unit is the phase balance unit described above.

The solution of the invention has the following advantages:

1. The phase balancing unit of the present invention comprises an input port, a plurality of output ports, and a power dividing circuit having a main circuit and an output branch, wherein the phase delay length of the different frequency bands is changed by providing a coupling transmission line on the at least one output branch, thereby The phase dispersion problem from the input port to each output port is improved, and the phase dispersion due to the multi-section series power split or the band over-bandwidth is reduced, and the radiation index of the antenna is improved.

2. The coupled transmission line in the present invention is two parallel and mutually adjacent transmission lines, and the distance between the two transmission lines is less than 1/50 of the central operating wavelength λ. By coupling the transmission line at close range The power splitter is skillfully combined in the communication field, and is applied to the entire power dividing circuit to change the transmission phase characteristic of the output port, thereby improving the shaping index of the antenna.

3. By changing the distance of two transmission lines in a pair of coupled transmission lines and/or the length of the transmission line, the phase delay length of the signal can be adjusted, thereby achieving the phase transmission characteristic of the output port.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of a phase balance unit of the present invention;

2 is a partial cross-sectional view of a power divider circuit phase balancing device of the present invention;

3 is a partial cross-sectional view showing another embodiment of a power balancer circuit phase balance device according to the present invention;

4 is a perspective view of still another embodiment of a power divider circuit phase balancing device of the present invention.

Wherein, in the embodiment of the present invention: 1, an input port; 2, an output port; 3, a power divider circuit; 31, a main circuit; 32, an output branch; 321 , a coupled transmission line; 4, a fixed dielectric component; Moving medium component; 7, dielectric substrate; 51, input connector; 52, output connector; 100, phase balance unit; 500, housing; 1000, power divider circuit phase balance device.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

Embodiment 1

As shown in FIG. 1 , an embodiment of the present invention provides a phase balancing unit 100 including an input port 1, a plurality of output ports 2, and a power splitter circuit 3, the splitter circuit 3 having a main connection with the input port 1. The circuit 31 is connected to the main circuit 31 and is connected to each output port in one-to-one correspondence A plurality of output branches 32 of 2, and at least one of said output branches 32 is provided with a coupling transmission line 321 for changing the phase of the signal. The power divider circuit 3 is composed of a one-point multi-power splitter or a plurality of two-way splitters connected in series or in parallel to form a multi-point power split network.

A signal is input from the input port 1 to the phase balancing unit 100, flows through the main circuit 31 of the power divider circuit 3, enters each of the output branches 32, and is output from the output port 2 connected to the output branch 32. When the coupling transmission line 321 is provided on the output branch 32, the phase delay length of the signal can be changed due to the coupling transmission of the coupling transmission line 321, so that the phase of the signal at each output port 2 is consistent at different frequency points.

In the present invention, signal coupling is performed by providing a close-coupled transmission line 321 at one or more output branches 32, thereby changing the phase delay length of the different frequency bands, thereby making the phase separation of the input port 1 to each output port 2 The sexual problem has been improved and the radiation index of the antenna has been improved.

Preferably, the coupled transmission line 321 is a pair of parallel and mutually adjacent transmission lines (not labeled) that are folded by the output branch pair. Preferably, the distance between the two transmission lines is less than 1/50 of the central operating wavelength λ.

The invention combines the close-coupled transmission line 321 and the power divider circuit 3 skillfully, and applies to the power division circuit to change the transmission phase characteristic of the entire power division circuit, and reduces the multi-section series power division or the frequency band is too wide. The phase dispersion is such that the phase input to each of the output ports 2 is greatly improved, thereby improving the shaping index of the antenna.

Preferably, different phase distribution characteristics can be achieved by adjusting the coupling length and/or distance, thereby achieving adjustment of the antenna shaping. In other words, each of the plurality of output branches 32 is provided with a pair of coupled transmission lines 321, and the distance between the two transmission lines of each pair of coupled transmission lines 321 is equal or unequal; or the lengths of the pairs of coupled transmission lines 321 are equal or unequal.

Embodiment 2

As shown in FIG. 2, the present invention relates to a power splitter circuit phase balance device 1000 (hereinafter referred to as "phase balance device 1000"), to which the phase balance unit 100 of the first embodiment is applied.

The phase balancing device 1000 includes a housing 500, an input connector 51 disposed on a sidewall of the housing 500, and a plurality of output connectors 52, and the phase balancing unit 100, the phase balancing unit 100 is disposed in the housing 500, and The input port 1 is connected to the input connector 51, A plurality of the output ports 2 are connected in one-to-one correspondence with the plurality of output connectors 52.

Since the phase balancing device 1000 of the present invention has the above-described phase balancing unit 100, the signal coupling is performed by providing the short-distance coupling transmission line 321 in one or more output branches 32, thereby changing the phase delay length of different frequency bands, thereby making the signal from The problem of phase dispersion of the input connector 51 to each output connector 52 is improved, and the radiation index of the antenna is improved.

Referring to FIG. 3 , further, a fixed dielectric element 4 may be disposed above the coupling transmission line 321 for increasing the dielectric constant near the coupling transmission line 321 , so that the length of the coupling transmission line 321 and/or the width thereof may be shortened. Further, the volume of the phase balancing unit 100 can be reduced to facilitate the phase balancing unit 100 to be mounted in the casing.

Please continue with FIG. 3, further, the main circuit 31 is partially or entirely covered with the removable medium element 6, and the movable medium element can be moved along the main circuit transmission path for dynamically adjusting each output port 2 The phase of the signal allows the phase balancing device 1000 of the present invention to be used as a phase shifter.

In the embodiment, the input joint 51 and the output joint 52 are both disposed on the same side wall of the outer casing. In other embodiments, the input connector 51 and the output connector 52 may also be disposed on different sidewalls of the housing 500. Similarly, the input port 1 and the output port 2 may be disposed on the same side or different sides of the main circuit 31.

Further, in order to facilitate the welding of the input joint 51 and the input port 1, the output joint 52 and the output port 2, the side wall of the outer casing 500 is drilled at a position corresponding to the input port and the output port for input and output joints. 51. The inner conductor (not labeled) of the coaxial cable to which the output connector 52 is connected penetrates from the outside of the casing 500 and is connected to the input port 1 and the output port 2.

Embodiment 3

As shown in FIG. 4, this embodiment provides another embodiment of a power splitter circuit phase balance device, the main feature of which is that the power splitter circuit phase balance device 1000 adopts a microstrip line structure, that is, the phase balance unit 100. It is disposed on a dielectric substrate 7. The rest is the same as the first embodiment.

The above is only a part of the embodiments of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims

A phase balancing unit, comprising: an input port, a plurality of output ports, and a power divider circuit;

The power splitter circuit includes a main circuit connected to the input port and a plurality of output branches connected to the main circuit and connected to the output ports in a one-to-one correspondence, and at least one of the output branches is provided for changing a signal phase Coupling transmission line.
The phase balancing unit of claim 1 wherein said coupled transmission line is a pair of parallel and mutually adjacent transmission lines that are folded by the output branch pair.
The phase balancing unit according to claim 2, wherein the power splitter circuit is composed of a plurality of splitters or a plurality of splitters in series or in parallel.
The phase balancing unit according to claim 2, wherein a plurality of said output branches are provided with coupled transmission lines, and the distances of the two transmission lines of each pair of coupled transmission lines are equal or unequal.
The phase balancing unit according to claim 2, wherein a plurality of said output branches are provided with coupled transmission lines, and the lengths of said plurality of coupled transmission lines are equal or unequal.
A power divider circuit phase balancing device, comprising: a housing, an input connector disposed on the housing, a plurality of output connectors, and a phase balancing unit disposed in the housing, wherein the phase balancing unit is claim 1 The phase balancing unit according to any one of the five;

The input port is connected to the input connector, and the output port is connected to the output connector one by one.
A power divider circuit phase balancing apparatus according to claim 6, wherein said coupled transmission line is partially or entirely covered by a fixed dielectric element.
A power divider circuit phase balancing apparatus according to claim 6, wherein said main circuit is partially or entirely covered by a movable medium element, and said movable medium element is movable along a main circuit.
The power divider circuit phase balancing device according to claim 8, wherein the input connector and the output connector are disposed on one side wall or different side walls of the outer casing.
A power divider circuit phase balancing device comprising a dielectric substrate and disposed on a dielectric substrate The phase balancing unit, which constitutes a microstrip line, is characterized in that the phase balancing unit is the phase balancing unit according to any one of claims 1 to 5.