WO2021238210A1

WO2021238210A1 - Phase shifter integrated with feed and antenna using same

Info

Publication number: WO2021238210A1
Application number: PCT/CN2020/141689
Authority: WO
Inventors: 王强; 徐慧俊; 李志龙; 刘培涛
Original assignee: 京信通信技术(广州)有限公司; 京信射频技术(广州)有限公司
Priority date: 2020-05-29
Filing date: 2020-12-30
Publication date: 2021-12-02
Also published as: CN212485510U

Abstract

The present invention relates to a phase shifter integrated with a feed and an antenna using the same. The phase shifter comprises a cavity, a phase shift network, a radio frequency channel, and a direct current channel. A signal input port is arranged at the cavity. The radio frequency channel and the phase shift network are provided in the cavity. One end of the radio frequency channel is connected to the signal input port, and the other end thereof is connected to the phase shift network. The direct current channel is electrically connected to the end of the radio frequency channel which is connected to the signal input port. Since the direct current channel is spatially separated from the radio frequency channel and the phase shift network, and the radio frequency channel and the phase shift network are configured to share the cavity, the size of the phase shifter can be greatly reduced, and an antenna using the phase shifter has excellent matching characteristics and a wider bandwidth.

Description

Phase shifter with integrated feeder and antenna using the same

【Technical Field】

This application relates to the field of communications, and in particular to a phase shifter with integrated feeder and an antenna using the same.

【Background technique】

The existing Gemini "1+1" antenna feed solution in the 5G era solves 4G\5G network coverage. It requires one antenna to integrate all 4G network standard antennas. Therefore, there are more and more antenna frequency bands/ports, 15-frequency and 30-port antennas. Has been introduced to the market. There are many antenna ports and the structure is complicated. It is very difficult to check how the ports and the array correspond. Therefore, AISG3.0 requires the antenna radio frequency port to support the PING function to check the channel condition. Each radio frequency port needs to be equipped with a feeder that outputs an OOK DC signal.

Both the DC path and the RF path of the existing feeder are implemented in a metal cavity. The DC path contains a low-pass/DC filter circuit. The low-pass filter circuit is often composed of lumped components, capacitors and inductances, occupying a huge space, resulting in the antenna interior The layout is difficult, and even the multi-frequency antenna cannot be arranged, and it cannot be integrated with the phase shifter. Based on this, the configuration of the DC output feeder is realized, the antenna cost increases significantly, and the assembly is difficult, complicated and uneconomical.

【Content of Application】

The primary purpose of the present application is to provide a phase shifter with integrated feeder that is small in size and can optimize the antenna layout.

Another object of the present application is to provide an antenna using the above-mentioned phase shifter.

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

As a first aspect, the present application relates to a phase shifter with integrated feeder, which includes a cavity and a phase shifting network, a radio frequency path and a DC path arranged in the cavity. The cavity is provided with a signal input port. The radio frequency path is arranged in the cavity, one end of which is connected to the signal input port, and the other end is connected to the phase shifting network; the direct current path is fixed to the cavity outside the cavity, and is connected to the radio frequency path for signals One end of the input port is electrically connected.

Preferably, the radio frequency path includes a first capacitor, the first capacitor is arranged in the phase shifter cavity, one end of the first capacitor is connected to the phase shifting network, and the other end is connected to the signal input port.

Preferably, the first capacitor is a microstrip line capacitor, which includes a dielectric plate carrying the phase shifting network and conductor strips laid on opposite sides of the dielectric plate and coupled to each other, and the conductor strips on both sides are correspondingly connected to the phase shifting network And signal input port.

Preferably, the first capacitor is a sleeve type capacitor, including a first conductor post, a second conductor post, and a coupling medium. The medium is distributed between the first conductor post and the second conductor post, and the other end of the second conductor post is connected to the phase shifting network.

Preferably, the DC path includes an inductor, a second capacitor, and a DC output terminal. The inductor, the second capacitor and the DC output terminal are set on the outside of the cavity. The other end of the inductor is connected to one end of the second capacitor, and the second capacitor is connected to the DC output end.

Preferably, the second capacitor is welded to the DC transmission wire, and the end of the DC transmission wire away from the capacitor serves as the DC output terminal; a first insulator is provided on the cavity, and the first insulator is provided on the second Between the solder joint of the capacitor and the DC transmission wire and the cavity, it is used to realize the insulation isolation between the solder joint and the cavity.

Preferably, a connection hole is opened on the side wall of the cavity close to the connection position of the radio frequency path and the signal input port, and a pin at one end of the inductor passes through the connection hole and is electrically connected to the radio frequency path.

Preferably, a second insulator is provided in the connecting hole, and the second insulator is attached to the connecting hole and surrounds the pin connecting the inductor and the radio frequency path.

Preferably, the cavity is a double-layer cavity, and each layer of the cavity is provided with the phase shifting network, the radio frequency path, and the direct current path.

As a second aspect, the present application also relates to an antenna, including a reflector, a radiation unit, and a phase shifter. The radiation unit and the phase shifter are separately arranged on both sides of the reflector and are electrically connected. The phase shifter is the above-mentioned integrated feeder. Phase shifter for electrical appliances.

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

1. In the phase shifter of the integrated feeder of the present application, the RF path and the DC path of the feeder are arranged in space, the RF path and the phase shifting network of the phase shifter share a cavity, which does not occupy additional space, and the DC path is Distributed outside the cavity, the size can be greatly reduced, and at the same time it has excellent matching characteristics and a wider bandwidth.

2. In the phase shifter of the integrated feeder of the present application, the radio frequency path and the DC path belong to different spaces, and the DC path constitutes a low-pass filter path, and the filtering characteristics and suppression index are better after passing through the filter circuit.

3. This application shares the RF path with the phase shifter cavity. The DC path is set on the outer surface of the phase shifter cavity. The size is small and does not occupy additional space, and the assembly is simple, which greatly adapts to the support of multi-frequency and multi-port antennas to support left and right RF ports. PING function feeder layout.

【Explanation of the drawings】

FIG. 1 is a perspective view of a phase shifter of an integrated power feeder according to an embodiment of this application;

Fig. 2 is an enlarged view of part A in the phase shifter shown in Fig. 1;

Figure 3 is a partial cross-sectional view of the phase shifter shown in Figure 1;

4 is a schematic structural diagram of an internal circuit board of a phase shifter according to an embodiment of this application;

Fig. 5 is a cross-sectional view taken along the line A-A of the circuit board shown in Fig. 4;

6 is a schematic structural diagram of an internal circuit board of a phase shifter according to another embodiment of this application;

Fig. 7 is a cross-sectional view taken along the line A-A of the circuit board shown in Fig. 6.

【Detailed ways】

The present application will be further described below with reference to the accompanying drawings and exemplary embodiments, in which the same reference numerals in the accompanying drawings all refer to the same components. In addition, if a detailed description of the known technology is unnecessary to show the features of the present application, it will be omitted.

1 to 3, as a second aspect, the present application relates to an integrated power feeder phase shifter 100 (hereinafter referred to as "phase shifter"), on the basis of the phase shifter body is integrated with the power feeder, where the feeder When the phase shifter is applied to the antenna (not shown in the figure, the same below), the electrical appliance can realize the radio frequency signal and OOK signal in the antenna, RCU (not shown in the figure, the same below) and base station (not shown in the figure) , The same below).

The phase shifter includes a phase shifter body and a radio frequency path 20 and a DC path 40 that are both fixed and electrically connected to the phase shifter body, wherein the radio frequency path is used to transmit radio frequency signals, and the DC path is used to transmit The low frequency signal and the direct current signal, in other words, the radio frequency path and the direct current path together constitute a power feeder.

The phase shifter body specifically includes a cavity 10, a phase shifting network 30, a phase shifting dielectric plate (not labeled, the same below), and a phase shifting dielectric plate for pushing and pulling the phase shifting dielectric plate to move along the length of the cavity to change the dielectric constant of the phase shifting network的拉杆(not marked, the same below). Since the structure of the phase shifter body is well known to those skilled in the art, it will not be repeated here.

The cavity 10 can be integrally formed by a pultrusion process or a die-casting process, and has a top wall, a bottom wall and a side wall connecting the two. At least one end of the cavity 10 is opened to provide a pull rod to drive the movement of the phase shifting medium plate.

The phase shifting network 30 is arranged on a dielectric plate 60 and is supported in the cavity 10. The phase shifting network 30 is preferably a power division phase shifting network 30, which has a signal input terminal and a plurality of signal output terminals, Realize the division of a signal into multiple signals for output, and the phase between multiple signals can be changed according to a certain rule, for example, the phase shifts of multiple signal output terminals can be formed into an arithmetic sequence. Corresponding to the signal input terminal and the signal output terminal of the phase shift network 30, the cavity 10 is provided with a signal input port 101 and a signal output port.

Preferably, the radio frequency path 20 includes a radio frequency input terminal 201, a first capacitor 202, and a radio frequency output terminal connected in sequence. The radio frequency input terminal 201 is connected to the signal input port 101, and the radio frequency output terminal is connected to the phase shifter. The input end of the network 30 realizes the connection between the radio frequency path 20 and the phase shifting network 30. Wherein, the radio frequency input terminal 201 can be used as an antenna port, which is connected to the base station via a transmission cable. The radio frequency path 20 can couple the radio frequency signal received from the antenna radiating unit to the base station, or couple the radio frequency signal from the base station to the antenna radiating unit to radiate outward. Wherein, the first capacitor 202 is connected in series between the signal input port 101 and the radio frequency output terminal, and is used to pass radio frequency signals to suppress low frequency signals and isolate direct current.

4 and 5, in one embodiment, the first capacitor 202 includes a dielectric plate 60 and

conductor strips

2021 and 2022 laid on both sides of the dielectric plate 60. The two

conductor strips

2021 and 2022 are arranged opposite to each other. Coupled to form a microstrip capacitor. The two-sided conductor strips 2021 and 2022 are correspondingly connected to the signal input port 101 and the phase shift network 30.

6 and 7, in another embodiment, the first capacitor 202 is a sleeve capacitor, which includes a first conductor post 2023, a second conductor post 2024, and a coupling medium 2025. The first conductor One end of the column 2023 is connected to the signal input port 101, and the other end is provided with a coupling hole (not labeled, the same below). The coupling medium 2025 is sleeved on the end of the second conductor post 2024 and inserted into the coupling of the first conductor post 2023 Inside the hole, the first conductor post 2023 and the second conductor post 2024 are coupled and connected, and the other end of the second conductor post 2024 is connected to the phase shift network 30.

Two forms of the first capacitor 202 are provided above, but they cannot be regarded as constituting a limitation on the use of capacitors, and they can also be other capacitors that can isolate direct communication and are suitable for radio frequency signal transmission.

Preferably, the DC path 40 includes a DC input terminal (not labeled), an inductor 41, a second capacitor 42 and a DC transmission wire 43 that are connected in sequence, and an end of the DC transmission wire 43 away from the second capacitor 42 forms a DC The output terminal can be connected to the RCU via a cable. One end of the inductor 41 passes through the cavity 10 and is connected to the end of the first capacitor 202 connected to the signal input port 101, so that the low-frequency signal (such as the OOK signal) from the base station and the direct current can be separated, and the direct current is transmitted through the direct current transmission wire. 43 is transmitted to the DC output terminal and then output to the RCU.

In the DC path, the inductor 41 and the second capacitor 42 form a low-pass filter path for isolating radio frequency signals, allowing low-frequency signals (such as OOK signals) and DC signals to pass, with better filtering characteristics and better suppression indicators. .

In other embodiments, the DC path may not be provided with the second capacitor 42 and only the inductor 4121 may be provided, and the radio frequency signal may also be isolated to realize the transmission of the DC signal and the low frequency signal between the base station and the RCU. When the second capacitor 42 is not provided in the DC path, the end of the inductor 41 away from the first capacitor 202 of the joint is connected to the DC transmission wire 43 and is connected to the RCU via the DC transmission wire 43.

Preferably, the cavity 10 corresponds to the connection position of the first capacitor 202 and the inductor 41, that is, a connection hole is opened on the side wall of the cavity 10 near the connection position of the radio frequency path 20 and the signal input port 101, and the inductor The pin at one end of 41 passes through the connecting hole and is electrically connected to the radio frequency path 20. More preferably, a second insulator 51 is provided in the connecting hole, and the second insulator 51 is attached to the connecting hole and surrounds the pin connecting the inductor 41 with the radio frequency path 20, so as to realize the connection of the pin of the inductor 41. Positioning, so as to ensure the stability of the connection part, and realize the insulation between the inductor 41 and the cavity 10.

A wiring groove (not labeled) for fixing a coaxial cable is opened on the side wall of the cavity 10, the second capacitor 42 is embedded in the wiring groove, and one end of the second capacitor 42 is away from the inductance 41 away from the radio frequency path 20. One end is connected, and the other end is welded to the DC transmission wire. The cavity 10 is also provided with a first insulator 52, and the pad is provided between the solder joints of the capacitor and the DC transmission wire and the cavity 10 to realize the isolation between the solder joints and the cavity 10, that is, to achieve Insulation between the cavity 10 and the DC path.

In this application, the cavity 10 is preferably a double-layer cavity, and each layer of the cavity 10 is provided with the phase shifting network 30, the radio frequency path 20, and the DC path to support that the phase shifter is suitable for dual-frequency antennas. Realize the phase shift function of the two frequency band signals.

In a word, the phase shifter provided in the present application integrates the power feeder, and the radio frequency path 20 and the phase shifting network 30 are jointly arranged in the cavity 10 without occupying additional space, and the DC path is arranged outside the cavity 10, realizing With a space-divided design, the size of the cavity 10 can be greatly reduced, while at the same time it has excellent matching characteristics and a wider bandwidth. Among them, the DC path constitutes a low-pass filter path, and the filtering characteristics and suppression indicators are better after passing through the filter circuit. In addition, the phase shifter body and the power feeder are arranged in a common body, and the assembly is simple, which greatly adapts to the layout of the power feeder supporting the PING function of the left and right RF ports of the multi-frequency and multi-port antenna.

As a second aspect, the present application also relates to an antenna using the above-mentioned phase shifter, which includes a reflector, radiating units separately arranged on the front and back of the reflector and electrically connected, and the above-mentioned phase shifter. By applying the above-mentioned phase shifter, the antenna has a simple layout, excellent matching characteristics, and a wide bandwidth.

Although some exemplary embodiments of the present application have been shown above, those skilled in the art will understand that changes can be made to these exemplary embodiments without departing from the principle or spirit of the present application. The scope of is defined by the claims and their equivalents.

Claims

A phase shifter with an integrated feeder includes a cavity and a phase shift network arranged in the cavity. The cavity is provided with a signal input port, and is characterized in that it also includes a radio frequency path and a direct current path. The radio frequency path Set in the cavity, one end is connected to the signal input port, and the other end is connected to the phase shifting network; the DC path is fixed to the cavity outside the cavity, and is connected to the radio frequency path to the signal input port One end is electrically connected.
The phase shifter with integrated feeder according to claim 1, wherein the radio frequency path comprises a first capacitor, the first capacitor is provided in the phase shifter cavity, and one end of the first capacitor is connected to the phase shifter. Network, the other end is connected to the signal input port.
The phase shifter of the integrated feeder according to claim 2, wherein the first capacitor is a microstrip line capacitor, which includes a dielectric board carrying the phase shifting network and a dielectric board laid on opposite sides of the dielectric board and mutually connected. The coupled conductor strips, the conductor strips on both sides are correspondingly connected to the phase shift network and the signal input port.
The phase shifter of the integrated feeder according to claim 2, wherein the first capacitor is a sleeve type capacitor, comprising a first conductor post, a second conductor post and a coupling medium, and one end of the first conductor post is connected The other end of the signal input port covers one end of the second conductor post, the coupling medium is distributed between the first conductor post and the second conductor post, and the other end of the second conductor post is connected to the phase shifting network.
The phase shifter of the integrated feeder according to claim 1, wherein the DC path includes an inductor, a second capacitor, and a DC output terminal, and the inductor, the second capacitor and the DC output terminal are set outside the cavity One end of the inductor passes through the cavity and is connected to the end of the radio frequency path connected to the signal input port, the other end of the inductor is connected to one end of the second capacitor, and the second capacitor is connected to the DC output end.
The phase shifter of the integrated feeder according to claim 5, wherein the second capacitor is welded to a DC transmission wire, and an end of the DC transmission wire away from the capacitor serves as the DC output terminal;

A first insulator is arranged on the cavity, and the first insulator is arranged between the solder joints of the second capacitor and the DC transmission wire and the cavity, and is used to realize insulation isolation between the solder joints and the cavity.
The phase shifter of the integrated feeder according to claim 5, wherein a connecting hole is opened on the side wall of the cavity near the connection position of the radio frequency path and the signal input port, and the pin at one end of the inductor passes through The connecting hole is electrically connected with the radio frequency path.
The phase shifter of the integrated feeder according to claim 7, wherein a second insulator is provided in the connecting hole, and the second insulator is attached to the connecting hole and connects the inductor with the radio frequency path. Enclose your feet.
The phase shifter with integrated feeder according to any one of claims 1 to 8, wherein the cavity is a double-layer cavity, and each layer of cavity is provided with the phase shifting network, radio frequency path and DC path.
An antenna comprising a reflector, a radiating unit and a phase shifter, the radiating unit and the phase shifter are separately arranged on both sides of the reflector and electrically connected, characterized in that the phase shifter is any one of claims 1 to 9 The phase shifter of the integrated feeder.