WO2020135533A1

WO2020135533A1 - Feed system, array antenna, and base station

Info

Publication number: WO2020135533A1
Application number: PCT/CN2019/128466
Authority: WO
Inventors: 金莉; 李超超; 肖伟宏; 万振兴
Original assignee: 华为技术有限公司
Priority date: 2018-12-29
Filing date: 2019-12-25
Publication date: 2020-07-02
Also published as: EP3923416A1; EP3923416B1; EP3923416A4; CN111384600A

Abstract

The embodiments of the present application provide a feed system, array antenna, and base station, relating to the technical field of mobile communications. The invention is used for providing a phase-shift feed system having a simple structure. The feed system is located on the back of a metal plate, and the feed system comprises: a plurality of first feed chambers, and a plurality of first feed strip lines suspended in the plurality of first feed chambers; each of the plurality of first feed strip lines comprises a plurality of output ports, and said plurality of first feed chambers shares a metal surface with the ground layer of the metal plate; the metal surface has a plurality of openings corresponding to a plurality of first radiating elements located on the front side of the metal plate; the plurality of output ports of each first feed strip line is connected one-to-one to the plurality of first radiating elements by means of the plurality of openings; the plurality of first feed strip lines is used for providing a transmission signal to the plurality of first radiating elements.

Description

Feeding system, array antenna and base station

This application requires the priority of the Chinese patent application submitted to the State Intellectual Property Office on December 29, 2018, with the application number 201811637333.X and the application name "a feed system, array antenna, and base station", all of which are approved by The reference is incorporated in this application.

Technical field

The embodiments of the present application relate to the technical field of mobile communications, and in particular, to a feeding system, an array antenna, and a base station.

Background technique

With the development of multi-frequency and multi-system in mobile communication systems, base station antennas also require multi-frequency and multi-polarization. However, in the design of multi-band antennas, because of the large number of frequency bands, the connection of the feed network is very complicated. The production time of conventional components and cable models is high, the assembly is difficult, and the overall system loss is high.

As shown in Figure 1, the antenna feed network contains at least one feeder, each feeder is coaxial and contains inner and outer conductors; the outer conductor uses a stretched profile tube with a slit along the stretched direction ( That is, parallel to the stretching direction); the cavity formed by the suspension of the inner conductor and the outer conductor is supported by a medium; the size of the slit opened by the outer conductor ensures that the inner conductor dielectric support can reach the coaxial cavity.

However, the antenna feed network shown in Figure 1 cannot support the miniaturization of the antenna, especially when the multi-band antenna is large, it is not convenient for production and assembly; it takes up a lot of width space, and the single-frequency antenna can be laid out, which is difficult to penetrate multiple frequency band Full network.

Summary of the invention

Embodiments of the present application provide a feeding system, an array antenna, and a base station, to provide a phase-shifting feeding system with a simple structure.

In order to solve the above technical problems, the embodiments of the present application provide the following technical solutions:

In a first aspect, an embodiment of the present application provides a feeding system, which is located on the back of a metal plate. Wherein, the feeding system includes: a plurality of first feeding cavities, and a plurality of first feeding striplines suspended in the plurality of first feeding cavities. Wherein, each of the plurality of first feeding strip lines includes a plurality of output ports, and the plurality of first feeding cavities share a metal surface with the ground layer of the metal plate. The metal surface has a plurality of openings corresponding to the plurality of first radiating units located on the front surface of the metal plate, and the plurality of output ports of each first feeding strip line pass through the plurality of openings and the plurality of first radiating units 1 One connection, a plurality of first feeding strip lines are used to provide transmission signals to the plurality of first radiating units.

An embodiment of the present application provides a feeding system, through which a plurality of output ports of each first feeding strip line are connected to a plurality of first radiating units one by one through a plurality of openings. In this way, each first feeding strip line can provide a transmission signal to a plurality of first radiating units connected to each other without borrowing cables or other conductors. It can realize high-efficiency feeding of the entire network without cables, and the first feeding stripline and the plurality of first radiating units are simple to connect and easy to assemble, making automatic assembly of multi-frequency antennas possible.

In a possible implementation manner, the distance between any first feeding strip line and the upper wall of the first feeding cavity where any first feeding strip line is located and any first feeding The distance between the strip line and the lower wall of the first feeding cavity where any first feeding strip line is located is equal.

In a possible implementation, the first feeding strip line is covered with a sliding medium. The sliding medium is used to change the phase value of the first feeding strip line from the input port to the output port.

In a possible implementation manner, the plurality of first feeding striplines are used to provide the plurality of first radiating units with transmission signals having the same phase value.

In a possible implementation manner, the multiple first feeding cavities and the metal plate are integrally formed. Or a plurality of first feeding cavities and metal plates are coupled or electrically connected into one body.

In an optional implementation manner, multiple first feeding cavities may be integrally formed. The plurality of first feeding cavities may also be coupled and directly connected after being molded respectively.

In a possible implementation manner, the feeding system further includes: a plurality of second feeding cavities, and a plurality of second feeding cavities suspended in each of the second feeding cavities in the plurality of second feeding cavities Feed the stripline. Wherein, the plurality of second feeding striplines pass through the plurality of second feeding cavities and are connected to the plurality of second radiating units on the front of the metal plate. Wherein, the second feeding strip line is used to provide transmission signals to the plurality of second radiating units, and the plurality of second feeding cavities are perpendicular or parallel to the plurality of first feeding cavities.

In a possible implementation manner, the plurality of first feeding cavities includes: a first cavity and a second cavity arranged in parallel on the back of the metal plate, with isolation between the first cavity and the second cavity Cavity or gap. The plurality of second feeding cavities includes: a third cavity and a fourth cavity arranged in parallel, and the third cavity and the fourth cavity are perpendicular to the metal plate. The first cavity and the second cavity are located between the third cavity and the fourth cavity, and the first cavity and the third cavity are vertically connected, and the second cavity and the fourth cavity The cavity is connected vertically.

In a possible implementation manner, the multiple first feeding cavities include: a first cavity and a second cavity arranged in parallel, the first cavity and the second cavity are respectively connected to the metal The plates are vertically connected; a plurality of second feeding cavities, including: a third cavity and a fourth cavity arranged in parallel on the back of the metal plate, the first cavity and the second cavity are located in the third Between the cavity and the fourth cavity, the first cavity is vertically connected to the third cavity, and the second cavity is vertically connected to the fourth cavity.

In a possible implementation manner, the plurality of first feeding cavities includes: a first cavity and a second cavity arranged in parallel, and the first cavity and the second cavity are respectively vertically connected to the metal plate . The second feeding cavity includes: a third cavity and a fourth cavity arranged in parallel, the third cavity and the fourth cavity are vertically connected to the metal plate; the first cavity and the second cavity are located at the third Between the cavity and the fourth cavity, and the first cavity is in contact with the third cavity, and the fourth cavity is in contact with the second cavity.

In a possible implementation, there is a gap between the first cavity and the second cavity.

In a possible implementation manner, the first feeding strip line includes a power division phase shift strip line.

In a possible implementation manner, the radiation unit in the embodiment of the present application uses a dual-polarized radiation half-wave oscillator.

In a possible implementation manner, the feeding strip line in the embodiment of the present application may be any metal carrier that transmits signals.

In a second aspect, an embodiment of the present application provides an array antenna, including: a metal plate and a plurality of columns of antennas disposed on the metal plate, the antenna includes any possible implementation as in the first aspect to the first aspect The feed system described in the manner, a plurality of first radiating units located on the front of the metal plate, and/or a plurality of second radiating units located on the front of the metal plate, a plurality of first radiating units and a plurality of second radiating units and The ground layer of the metal plate is electrically connected, and the feeding system is used to provide a transmission signal to the plurality of first radiating units, and/or the plurality of second radiating units.

In a third aspect, an embodiment of the present application provides a base station, including the array antenna described in the second aspect.

BRIEF DESCRIPTION

Figure 1 is a schematic diagram of the structure of a feeding system in the prior art;

2 is a schematic structural diagram 1 of a feeding system provided by an embodiment of the present application;

3 is a schematic structural diagram 2 of a feeding system provided by an embodiment of the present application;

4 is a schematic structural diagram 3 of a feeding system provided by an embodiment of the present application;

FIG. 5 is a fourth schematic structural diagram of a feeding system provided by an embodiment of the present application;

6 is a schematic structural diagram 5 of a feeding system provided by an embodiment of the present application;

7 is a schematic structural diagram 6 of a feeding system provided by an embodiment of the present application;

8 is a schematic structural diagram 7 of a feed system provided by an embodiment of the present application;

9 is a schematic structural diagram of an array antenna provided by an embodiment of the present application;

10 is a schematic structural diagram of another array antenna provided by an embodiment of the present application.

detailed description

Before introducing the embodiments of the present application, firstly, the related terms involved in the embodiments of the present application will be explained:

1) Coupling connection (or coupling ground)

There is a capacitance effect between two metals that are close to each other and have a coupling area. When the capacitance value is appropriate, the RF signal can be transmitted between the two non-contact metals.

2) Direct connection (or direct grounding)

Direct contact between metals allows RF signals or DC signals to be transmitted between metals.

3) Polarization path

The feeding system that feeds the radiating unit needs to be fed separately according to the polarization of the radiating unit, so all channels of the feeding system for one polarization of the radiating unit are called polarization paths.

4) Array antenna

An antenna system composed of several identical vibrators arranged according to a certain geometric rule and working through a common feed system.

5) Half wave oscillator

A radiating structure composed of two metal arms of approximately equal length, each metal arm is approximately 1/4 of the radiation wavelength (the full length is half a wavelength, so it is called a half-wave oscillator), and the radiating structure is adjacent to each other through the metal arms Stimulate at the end.

In order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same or similar items that have substantially the same functions and functions. For example, the first radiating unit and the second radiating unit are only for distinguishing different radiating units, and their order is not limited. Those skilled in the art may understand that the words "first" and "second" do not limit the number and execution order, and the words "first" and "second" do not necessarily mean different.

It should be noted that in the present application, the words "exemplary" or "for example" are used as examples, illustrations or explanations. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being more preferred or advantageous than other embodiments or design. Rather, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A, B can be singular or plural. The character "/" generally indicates that the related object is a "or" relationship. "At least one of the following" or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one item (a) in a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be a single or multiple .

As shown in FIG. 2 and FIG. 3, FIG. 2 and FIG. 3 show a schematic structural diagram of a feeding system provided by an embodiment of the present application. The feeding system is located on the back of the metal plate 104. The power feeding system includes: a plurality of first power feeding cavities 101 (for example, the first power feeding cavity 101a and the first power feeding cavity 101b in FIG. 3), and a plurality of first power feeding cavities suspended A plurality of first feeding striplines (Suspended Striplines, SSL) 102 within the body 101 (for example, feeding striplines 102a and feeding striplines 102b in FIG. 3). Wherein, each of the plurality of first feeding strip lines 102 includes a plurality of output ports, and the plurality of first feeding cavities 101 and the ground layer of the metal plate 104 share a metal surface.

The metal surface has a plurality of first radiation units (Radiator) 103 (for example, as shown in FIG. 2 radiation unit 103-1, radiation unit 103-2, radiation unit 103-3, Radiating unit 103-4) corresponding to multiple openings, multiple output ports of each first feeding strip 102 are connected to multiple first radiating units 103 one by one through multiple openings, multiple first feeds The electrical strip line 102 is used to provide transmission signals to the plurality of first radiating units 103.

The back surface of the metal plate 104 in the embodiment of the present application is the surface opposite to the front surface of the metal plate 104. The front surface of the metal plate 104 can be used to set a plurality of first radiation units 103 arranged at intervals. The back surface of the metal plate 104 can be used to arrange a plurality of first feeding cavities 101.

It should be understood that the embodiment of the present application does not limit the number of the plurality of first radiating units 103 located on the front of the metal plate 104. In Fig. 2, it is only exemplified that there are 5 radiation units. In the actual process, there may be more radiation units or fewer radiation units as shown in FIG. 2. In addition, the plurality of first radiating elements 103 belong to the same antenna array. As shown in FIG. 2, the plurality of first radiation units 103 belong to the array 2.

Exemplarily, the multiple first feeding strip lines 102 in the embodiment of the present application are used to provide multiple first radiating units 103 with transmission signals of a first frequency band. For example, the first frequency band may be a high frequency band.

Exemplarily, the plurality of first feeding cavities 101 and the metal plate 104 in the embodiment of the present application may be integrally formed, or may be formed separately and then connected into a whole by other processes, which is not limited in the embodiment of the present application. The multiple first feeding cavities 101 are also integrally formed, and one feeding cavity corresponds to one polarization, and there is no need for multiple feeding cavities to be switched.

In the embodiment of the present application, the plurality of first feeding cavities 101 and the ground layer of the metal plate 104 share the same metal surface: the upper surface of the plurality of first feeding cavities 101 is the ground layer of the metal plate 104. Or the ground layer of the metal plate 104 is the upper surface of the plurality of first feeding cavities 101. For example, a first opening may be opened at a position where the bottom surface of the metal plate 104 is opposite to the plurality of first feeding cavities 101, and the upper surface of the plurality of first feeding cavities 101 may be used to compensate for the first opening, so that the metal The plate 104 becomes a complete metal plate. That is, the metal surface belongs to the plurality of first feeding cavities 101, and the metal surface is shared by the metal plate 104.

Exemplarily, the feeding strip line involved in the embodiments of the present application may be any metal carrier that transmits signals.

It should be understood that, in the embodiment of the present application, one first feeding strip line 102 is suspended in each of the first feeding chambers 101 in the plurality of first feeding chambers 101. Thus, a plurality of first feeding striplines 102 are suspended in the plurality of first feeding cavities 101. Each first feeding strip line 102 in the plurality of first feeding strip lines 102 is connected to one first radiating unit 103. One first feeding strip line 102 is connected to one feeding pin among the plurality of first radiating units 103.

In an optional implementation manner, the interval between any two openings in the plurality of openings on the metal surface in the embodiment of the present application corresponds to one of the first radiating units corresponding to the two openings respectively The interval between them is equal. For example, if the opening 1 corresponds to the radiating unit 103-1 and the opening 2 radiating unit 103-2, the interval between the opening 1 and the opening 2 is equal to the interval between the radiating unit 103-1 and the radiating unit 103-2 .

The embodiment of the present application does not limit the number of output ports that each first feeding strip line 102 has. Specifically, the number of output ports on a first feeding strip line 102 may be determined by the number of first radiating units 103 provided by the first feeding strip line 102 to transmit signals.

In the embodiment of the present application, the plurality of first feeding cavities 101 may be placed in parallel on the back of the metal plate 104 or vertically on the back of the metal plate 104 to match different first radiating units.

Exemplarily, as shown in FIG. 4, FIG. 4 is a path diagram of a one-way polarization feeding system. Take multiple output ports including: output port 102a, output port 102b, output port 102c, and output port 102d as an example. Then, the first feeding strip line 102 provides the transmission signal to the radiation unit 103-1 through the output port 102a. The first feeding strip line 102 provides a transmission signal to the radiation unit 103-2 through the output port 102b. The first feeding strip line 102 provides a transmission signal to the radiating unit 103-3 through the output port 102c. The first feeding strip line 102 provides a transmission signal to the radiation unit 103-4 through the output port 102d.

It should be understood that in the embodiment of the present application, one first feeding strip line is used to provide the same phase value of the transmission signal provided to the plurality of first radiating units 103 connected thereto. Or one first feeding strip line is used to provide the phase value of the transmission signal provided to different first radiating units 103 among the plurality of first radiating units 103 connected thereto to meet the design requirements.

Optionally, the radiation unit in the embodiment of the present application uses a dual-polarized radiation half-wave vibrator.

Generally, a feeding system can provide a transmission signal in a first frequency band or a transmission signal in a second frequency band (for example, a low frequency band). The above-mentioned plurality of first feeding cavities 101 and the plurality of first feeding striplines 102 suspended in the plurality of first feeding cavities 101 may be referred to as a first feeding system for Each first radiating unit 103 provides a transmission signal in the first frequency band. In addition, the power feeding system may further include: a second power feeding system for providing a plurality of second radiating units 105 with transmission signals of a second frequency band. The following will introduce the specific structure of the second feed system:

In an optional embodiment, the power feeding system in the embodiment of the present application may further include: a second power feeding system. The second feeding system is used to provide a second frequency band transmission signal to the plurality of second radiating units 105 located on the front of the metal plate. Among them, the second frequency band is lower than the first frequency band.

Exemplarily, the first frequency band is 400 MHz to 960 MHz. The second frequency band is 1350MHz to 6000MHz.

In a first possible implementation manner, the second feeding system includes: a plurality of second feeding strip lines that pass through the feeding cavity of the first feeding system It is used to provide a plurality of second radiating units 105 with transmission signals of a second frequency band.

It can also be understood that: a plurality of second feeding strip lines passing through the feeding cavity of the first feeding system divides the feeding cavity of the first feeding system into: a plurality of first feeding cavity 101.

It should be understood that each second feeding strip line in the embodiment of the present application also includes multiple output ports. The multiple output ports of a second feeding strip line correspond to the multiple second radiation units in one-to-one correspondence.

Exemplarily, as shown in FIG. 5, in FIG. 5, a plurality of first feeding cavities 101 includes: a first feeding cavity 101 a and a first feeding cavity 101 b as an example, and a plurality of first feeding bands The strip line 102 includes: a first feeding strip line 102a and a first feeding strip line 102b, taking the cavity through which the second feeding strip line 106 passes as the cavity 101c as an example. For example, the first feeding strip 102a is suspended in the first feeding cavity 101a, and the first feeding strip 102a and the first radiating unit 103 directly pass through the feeding pin 103-2 of the first radiating unit 103 connection. The first feeding strip line 102b is suspended in the first feeding cavity 101b, and the first feeding strip line 102b and the first radiating unit 103 are directly connected by the feeding pin 103-1 of the first radiating unit 103. The second feeding strip line 106 feeds the second radiating unit 105 after passing through the cavity 101c. It should be understood that the second feeding strip line 106 is directly connected to the feeding pin of the second radiating unit 105 after passing through the cavity 101c.

In the embodiment of the present application, the first feeding strip 102 and the feeding pins of the first radiating unit 103 are directly welded.

In a first possible implementation manner, the second power feeding system includes: a plurality of second power feeding cavities 107 (for example, the third cavity 107-1 and the fourth cavity 107-2 in FIG. 6) , And a plurality of second feeding striplines 106 (for example, feeding stripline 106-1 and feeding stripline 106-2) suspended in the plurality of second feeding cavities 107. Wherein, each second feeding cavity 107 in the plurality of second feeding strip lines 106 is connected to the plurality of second radiating units 105 located on the front of the metal plate 104.

Each second feeding strip line 106 is used to provide a transmission signal to a plurality of second radiating units 105 connected to each other. The plurality of second feeding cavities 107 and the plurality of first feeding cavities 101 vertical or parallel.

The second feeding strip line 106 in the embodiment of the present application is connected to the plurality of second radiating units 105, including: the second feeding strip line 106 is directly connected to the feeding pins of the plurality of second radiating units 105.

It should be understood that the plurality of second feeding striplines 106 suspended in the plurality of second feeding cavities 107 refer to: each of the second feeding cavities 107 is suspended in each of the second feeding cavities 107 A second feeding strip line 106 connected to the plurality of second radiating units 105 is provided. Thus, a plurality of second feeding strip lines 106 can be suspended in the plurality of second feeding cavities 107.

Specifically, in the structure shown in FIG. 6, each second feeding cavity 107 in the plurality of second feeding strip lines 106 passes through the respective second feeding cavity 107 and is located on the front of the metal plate 104 The plurality of second radiating units 105 are connected.

For example, as shown in FIG. 6, the feeding strip line 106-1 is suspended in the third cavity 107-1. Therefore, the feeding strip line 106-1 passes through the third cavity 107-1 and is connected to the feeding pin 105-1 of the second radiation unit 105. A feeding strip line 106-2 is suspended in the fourth cavity 107-2. The feeding strip line 106-2 passes through the fourth cavity 107-2 and is connected to the feeding pin 105-2 of the second radiation unit 105. For the connection relationship of the first power feeding system in FIG. 6, reference may be made to the description in FIG. 5, and details are not repeated here.

Specifically, in the structure shown in FIG. 6, each feeding pin of one first radiating unit 103 passes through an opening in the metal surface and is connected to a corresponding first feeding strip line. For example, in FIG. 6, the feeding pin 103-1 of the first radiating unit 103 is directly connected to the feeding strip line 102-1 through the opening. The feed pin 103-1 of the first radiation unit 103 is directly connected to the feed strip 102-2 through the opening.

Exemplarily, a plurality of second feeding cavities 107 and a plurality of first feeding cavities 107 in the embodiment of the present application are integrally formed. Or a plurality of second feeding cavities 107 are integrally formed, and a plurality of first feeding cavities 101 are integrally formed. Then, a plurality of second feeding cavities 107 and a plurality of first feeding cavities 101 are connected together.

In this embodiment of the present application, each second feeding strip line has multiple output ports. In any of the embodiments of the present application, any second feeding strip line connects to a plurality of The phase value of the transmission signal provided by the second radiating unit 105 is the same, or any one of the second feeding striplines is directed to a different second of the plurality of second radiating units 105 connected to the any of the second feeding stripline The phase of the transmission signal provided by the radiating unit 105 meets the design requirements.

In the embodiment of the present application, the plurality of second feeding cavities 107 and the metal plate 104 may be integrally formed, or may be directly connected or coupled after being separately formed.

The positional relationship between the plurality of second power feeding cavities 107 and the plurality of first power feeding cavities 101 will be respectively described below with reference to FIGS. 6-8.

A possible implementation manner: As shown in FIG. 6, the plurality of first feeding cavities 101 include: a first cavity 101-1 and a second cavity 101-2 arranged in parallel on the back of the metal plate, the first There is an isolation cavity 101-1 or a gap between the cavity 101-1 and the second cavity 101-2. A plurality of second feeding cavities 107, including: a third cavity 107-1 and a fourth cavity 107-2 arranged in parallel, the third cavity 107-1 and the fourth cavity 107-2 and the metal The board 104 is vertical. The first cavity 101-1 and the second cavity 101-2 are located between the third cavity 107-1 and the fourth cavity 107-2, and the first cavity 101-1 and the third cavity The body 107-1 is vertically connected, and the second cavity 101-2 is vertically connected with the fourth cavity 107-2.

It should be understood that the first cavity 101-1 and the second cavity 101-2 are separated by an isolation cavity 101-1 or a gap.

It should be understood that, in the structure described in FIG. 6, the distance between the second feeding strip line 106 in any second feeding cavity and the left side of the any second feeding cavity is equal to the right side. In the embodiment of the present application, the side where the second feeding cavity is connected to the metal plate 104 can be taken as the upper side. Therefore, the left side of the second feed cavity and the right side of the second feed cavity may be determined according to the upper part of the second feed cavity.

In another possible implementation manner, as shown in FIG. 7, the multiple first feeding cavities 101 include: a first cavity 101-1 and a second cavity 101-2 arranged in parallel, and the first cavity 101- 1 and the second cavity 101-2 are vertically connected to the metal plate 104, respectively. The plurality of second feeding cavities 107 includes: a third cavity 107-1 and a fourth cavity 107-2 disposed in parallel on the back of the metal plate 104. The first cavity 101-1 and the second cavity 101-2 are located between 107-1 and the fourth cavity 107-2, and the first cavity 101-1 is perpendicular to the third cavity 107-1 Connected, the second cavity 101-2 and the fourth cavity 107-2 are vertically connected.

Specifically, in the structure shown in FIG. 7, each feeding pin of a second radiating unit 105 passes through the corresponding second feeding cavity and the first suspended in the second feeding cavity 107 The second feed strip line 106 is connected. For example, the feeding pin 105-1 of the second radiating unit 105 passes through the third cavity 107-1 and is connected to the feeding strip line 106-1 suspended in the third cavity 107-1. The feeding pin 105-2 of the second radiating unit 105 passes through the fourth cavity 107-2 and is connected to the feeding strip line 106-2 suspended in the fourth cavity 107-2.

Specifically, in the structure shown in FIG. 7, the distance above and below the distance between the second feeding strip line 106 suspended in any one of the second feeding cavities 107 and any one of the second feeding cavities 107 The distance is equal.

Specifically, in the structure shown in FIG. 7, each feed pin of a first radiating unit 103 passes through an opening in the metal surface and is connected to a corresponding first feed strip 102. For example, in FIG. 7, the feeding pin 103-1 of the first radiating unit 103 is directly connected to the feeding strip line 102-1 through the opening. The feed pin 103-2 of the first radiation unit 103 is directly connected to the feed strip 102-2 through the opening. Alternatively, any one of the first feeding strip lines 102 passes through an opening in the metal surface and is connected to one feeding pin of each corresponding plurality of first radiating units 103.

In another possible implementation manner, the plurality of first feeding cavities 101 include: a first cavity 101-1 and a second cavity 101-2 arranged in parallel. The first cavity 101-1 and the second cavity 101-2 are vertically connected to the metal plate 104, respectively. The second feeding cavity 107 includes a third cavity 107-1 and a fourth cavity 107-2 arranged in parallel. The third cavity 107-1 and the fourth cavity 107-2 are vertically connected to the metal plate 104. The first cavity 101-1 and the second cavity 101-2 are located between the third cavity 107-1 and the fourth cavity 107-2.

Optionally, in FIG. 8, the first cavity 101-1 is in contact with the third cavity 107-1, and the fourth cavity 107-2 is in contact with the second cavity 101-2 as an example. Of course, the first cavity 101-1 and the third cavity 107-1 may not be in contact. The fourth cavity 107-2 and the second cavity 101-2 may not be in contact.

Optionally, in the structure shown in FIGS. 7 and 8, there is a gap 108 between the first cavity 101-1 and the second cavity 101-2. It should be understood that the gap 108 may or may not exist, and is used to match different first radiation units. The first feeding stripline and the first radiating unit shown in Fig. 7 and Fig. 8 are also directly connected, and there is no need to increase the pin of the transfer, there may be a transfer PCB or other carrier, based on the increase of the number of solder joints. . The second feeding strip line and the second radiating unit are also directly connected, and there is no need to increase the pin of the transfer. There may be a PCB or other carrier of the transfer, based on the increase of the number of solder joints.

Optionally, the first feeding strip line in the embodiment of the present application includes a power division phase shift strip line.

Optionally, as shown in FIG. 3, a sliding medium 109 is further provided on each first feeding strip line in the embodiment of the present application. The sliding medium is used to change the phase value of the first feeding strip line from the input port to the output port.

For example, the sliding medium 109 is a movable medium covered on the first feeding strip line, and the phase value of the first feeding strip line from the input port to the output port is adjusted by changing the area covered on the strip line.

In another embodiment, an embodiment of the present application provides an array antenna. The array antenna includes a metal plate 104 and a plurality of antennas arranged on the metal plate. Feed system, a plurality of first radiating units 103 on the front of the metal plate 104, and/or a plurality of second radiating units 105 on the front of the metal plate 104, a plurality of first radiating units 103 and the plurality of first The two radiating units 105 are electrically connected to the ground layer of the metal plate 104, and the feeding system is used to provide transmission signals to the plurality of first radiating units 103 and/or the plurality of second radiating units 105.

It should be understood that the array antenna may only include multiple columns of first feeding systems, and each column of the first feeding system in the multiple columns of first feeding systems is used to provide transmission to multiple first radiating units 103 in the column signal. In this case, the array antenna is used to provide signals in the first frequency band.

It should be understood that there may be multiple columns of first feeding systems and multiple columns of second feeding systems in the array antenna. Each column of the first feeding system in the plurality of columns of the first feeding system is used to provide transmission signals to the plurality of first radiating units 103 in the column. Each row of second feeding systems in the plurality of rows of second feeding systems is used to provide transmission signals to the plurality of second radiating units 105 in the row. In this case, the array antenna is used to provide signals in the first frequency band and the second frequency band.

For example, as shown in FIG. 9, the array antenna shown in FIG. 9 includes: array 1 and array 2, wherein the structures of array 1 and array 2 are arranged symmetrically. 9 takes the structure shown in FIG. 5 as an example in which the first power feeding system and the second power feeding system in the array 1 and the array 2 adopt the structure shown in FIG.

It should be noted that the spacing between each column of antennas in the multi-row antennas is set. Specifically, a baffle 110 for separating each column of antennas is provided on the metal plate 104.

For example, as shown in FIG. 10, the array antenna shown in FIG. 10 includes: array 1 and array 2, wherein the structures of array 1 and array 2 are symmetrically arranged. FIG. 9 is an example in which the structure shown in FIG. 6 is adopted for the first power feeding system and the second power feeding system in the array 1 and the array 2.

It can be understood that the array antenna may also use the feeding system shown in FIG. 7 or FIG. 8.

The above is only the specific implementation of this application, but the scope of protection of this application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in this application. It should be covered by the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A power feeding system, characterized in that the power feeding system is located on the back of a metal plate, the power feeding system includes: a plurality of first power feeding cavities, and a suspension of the plurality of first power feeding cavities Multiple first feeding striplines in the body;

Wherein, each of the plurality of first feeding striplines includes a plurality of output ports, and the plurality of first feeding cavities share a metal surface with the ground layer of the metal plate ;

The metal surface has a plurality of openings corresponding to the plurality of first radiating units located on the front surface of the metal plate, and the plurality of output ports of each first feeding strip line pass through the plurality of openings One by one connected to the plurality of first radiating units, the plurality of first feeding strip lines are used to provide transmission signals to the plurality of first radiating units.
The power feeding system according to claim 1, wherein the power feeding system further comprises:

A plurality of second feeding cavities, and a plurality of second feeding striplines suspended in the plurality of second feeding cavities;

Wherein, each second feeding strip line of the plurality of second feeding strip lines is connected to a plurality of second radiating units located on the front surface of the metal plate;

Wherein, each of the second feeding strip lines is used to provide transmission signals to the plurality of second radiating units connected respectively, and the plurality of second feeding cavities and the plurality of first feeds The electrical cavity is vertical or parallel.
The power feeding system according to claim 2, wherein the plurality of first power feeding cavities include: a first cavity and a second cavity arranged in parallel on the back of the metal plate, the first There is an isolation cavity or gap between the first cavity and the second cavity;

The plurality of second feeding cavities includes: a third cavity and a fourth cavity arranged in parallel, the third cavity and the fourth cavity being perpendicular to the metal plate;

The first cavity and the second cavity are located between the third cavity and the fourth cavity, and the first cavity is vertically connected to the third cavity, the first The second cavity is vertically connected with the fourth cavity.
The power feeding system according to claim 2, wherein the plurality of first power feeding cavities include: a first cavity and a second cavity arranged in parallel, the first cavity and the first cavity The two chambers are respectively vertically connected with the metal plate;

The plurality of second feeding cavities includes: a third cavity and a fourth cavity disposed parallel to the back of the metal plate, and the first cavity and the second cavity are located in the third cavity Between the fourth cavity, the first cavity is vertically connected to the third cavity, and the second cavity is vertically connected to the fourth cavity.
The power feeding system according to claim 2, wherein the plurality of first power feeding cavities include: a first cavity and a second cavity arranged in parallel, the first cavity and the The second cavity is respectively vertically connected with the metal plate;

The second feeding cavity includes: a third cavity and a fourth cavity arranged in parallel, and the third cavity and the fourth cavity are vertically connected with the metal plate;

The first cavity and the second cavity are located between the third cavity and the fourth cavity, and the first cavity is in contact with the third cavity, the fourth The cavity is in contact with the second cavity.
The power feeding system according to claim 4 or 5, wherein there is a gap between the first cavity and the second cavity.
The feeding system according to any one of claims 1-6, wherein the first feeding strip line includes a power division phase shift strip line.
An array antenna, characterized by comprising: a metal plate, a plurality of columns of antennas provided on the metal plate, the antenna comprising the back of the metal plate according to any one of claims 1-7 A feeding system, a plurality of first radiating units on the front of the metal plate, and/or a plurality of second radiating units on the front of the metal plate, the plurality of first radiating units and the plurality of first The two radiation units are electrically connected to the ground layer of the metal plate, and the feeding system is used to provide a transmission signal to the plurality of first radiation units, and/or the plurality of second radiation units.
A base station, characterized by comprising the array antenna according to claim 8.