CN217641786U

CN217641786U - Cavity phase shifter and base station antenna

Info

Publication number: CN217641786U
Application number: CN202221265276.9U
Authority: CN
Inventors: 陈朝阳; 杨华; 叶桦; 张辉; 邓志耀
Original assignee: Guangdong Shenglu Communication Co ltd
Current assignee: Guangdong Shenglu Communication Co ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-10-21
Anticipated expiration: 2032-05-24

Abstract

The utility model relates to the technical field of antennas, concretely relates to cavity phase shifter and base station antenna, base station antenna include the cavity phase shifter, the cavity phase shifter includes the reflecting plate, antenna array and phase shifter, be provided with first feed network on the reflecting plate, the antenna array includes a row of radiating element group, the phase shifter includes phase shift circuit, phase shift medium, second feed network and phase shift cavity, phase shift medium and phase shift circuit slide relatively in order to realize shifting the phase; one end of the phase shift circuit is connected with a signal cable, the other end of the phase shift circuit is electrically connected with the first end of the first feed network, the second end of the first feed network is electrically connected with one end of the second feed network, the other end of the second feed network is electrically connected with the third end of the first feed network, and the fourth end of the first feed network is electrically connected with each radiation unit respectively; the utility model provides a cavity moves looks ware and need not to pass through cable and other device switching, reduces the loss relevant with the cable junction to improve the gain performance of antenna.

Description

Cavity phase shifter and base station antenna

Technical Field

The utility model relates to an antenna technology field, concretely relates to cavity moves looks ware and base station antenna.

Background

In a conventional base station antenna, a radiation unit, a phase shifter and a feed network are of independent structures, the phase shifter, the radiation unit and other feed network devices (power dividers, combiners and the like) need to be connected through cables, the connection of an antenna system is very complex, the cable layout is difficult, a large amount of cables are needed for switching, so that the loss of antenna gain is caused, the antenna performance is caused to have errors due to a complex assembly process, the consistency is poor, and batch and stable production is difficult to realize.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a cavity moves looks ware and base station antenna to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

In order to achieve the above object, the present invention provides the following technical solutions:

in a first aspect, an embodiment of the present invention provides a cavity phase shifter, including:

the upper surface of the reflecting plate is provided with a first feed network;

the antenna array is arranged at the top end of the reflecting plate and comprises a row of radiating unit groups, each row of radiating unit group comprises a plurality of radiating units, and the axis direction of the antenna array is the central connecting line direction of the plurality of radiating units in the row of radiating unit groups;

the phase shifter comprises a phase shifting circuit, a phase shifting medium, a second feed network and a phase shifting cavity, the phase shifting cavity is arranged at the bottom end of the reflecting plate, and the second feed network is arranged on the side face of the phase shifting cavity; the phase-shifting circuit and the phase-shifting medium are arranged in the phase-shifting cavity, and the phase-shifting medium and the phase-shifting circuit slide relatively to realize phase shifting;

one end of the phase shift circuit is connected with a signal cable, the other end of the phase shift circuit is electrically connected with the first end of the first feed network, the second end of the first feed network is electrically connected with one end of the second feed network, the other end of the second feed network is electrically connected with the third end of the first feed network, and the fourth end of the first feed network is electrically connected with each radiating unit in the row of radiating unit groups respectively.

As a further improvement of the above technical solution, a length direction of the phase shifter is parallel to an axial direction of the antenna array.

As a further improvement of the above technical solution, the phase shifters have two rows, the two rows of phase shifters are arranged oppositely, and the second feed networks in the two rows of phase shifters are arranged oppositely on the inner side surface of the phase shifting cavity; the first feed networks are divided into two groups, the length directions of the two groups of first feed networks are parallel to the axis direction of the antenna array, and the two groups of first feed networks are respectively connected with the second feed networks in the two rows of phase shifters in a one-to-one correspondence manner.

As a further improvement of the above technical solution, the radiation unit includes a positive polarization unit and a negative polarization unit, and the two sets of first feeding networks are respectively connected to the positive polarization unit and the negative polarization unit in a one-to-one correspondence manner.

As a further improvement of the above technical solution, the phase shifting cavity and the reflection plate are integrally formed.

As a further improvement of the above technical solution, the first feed network and the second feed network are both coupled to ground.

In a second aspect, the embodiment of the present invention further provides a base station antenna, including any of the first aspect, the cavity phase shifter.

The utility model has the advantages that: the utility model discloses a cavity moves looks ware and base station antenna, the utility model discloses can eliminate the cable junction who moves between looks ware, radiating element and the feed network, make it assemble simpler, the performance uniformity is good, realizes automatic batch, and stable production reduces the loss relevant with cable junction simultaneously to improve the gain performance of antenna.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an overall plan view of the multi-frequency base station antenna in the embodiment of the present invention;

fig. 2 is a schematic front view of a multi-frequency base station antenna according to an embodiment of the present invention;

fig. 3 is a schematic connection diagram of the multi-frequency base station antenna in the embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a cavity phase shifter, including:

the power supply device comprises a reflecting plate 100, wherein a first feed network 101 is arranged on the upper surface of the reflecting plate 100;

the antenna array 120 is disposed on the top end of the reflection plate 100, the antenna array 120 includes a row of radiation unit groups, the row of radiation unit groups includes a plurality of radiation units 121, and an axial direction of the antenna array 120 is a central connection direction of the plurality of radiation units 121 in the row of radiation unit groups;

the phase shifter 110, the phase shifter 110 includes a phase shift circuit 111, a phase shift medium 112, a second feeding network 113 and a phase shift cavity 114, the phase shift cavity 114 is disposed at the bottom end of the reflection plate 100, and the second feeding network 113 is disposed at a side surface of the phase shift cavity 114; the phase shift circuit 111 and the phase shift medium 112 are disposed inside the phase shift cavity 114, and the phase shift medium 112 and the phase shift circuit 111 slide relatively to realize phase shift;

one end of the phase shift circuit 111 is connected to a signal cable, the other end of the phase shift circuit 111 is electrically connected to a first end of the first feed network 101, a second end of the first feed network 101 is electrically connected to one end of the second feed network 113, the other end of the second feed network 113 is electrically connected to a third end of the first feed network 101, and a fourth end of the first feed network 101 is electrically connected to each radiation unit 121 in the row of radiation unit groups.

The utility model discloses a theory of operation does: when a signal is input into the phase shift circuit 111 in the phase shifter 110, the phase shift medium 112 slides relative to the phase shift circuit 111 to generate a phase shift signal, the phase shift signal is transmitted to the second feed network 113 through the first feed network 101, and is transmitted to the first feed network 101 after being subjected to phase compensation through the second feed network 113, and the signal is subjected to power distribution through the first feed network 101 and is transmitted to each radiation unit 121 to be radiated.

It should be noted that, the first feed network 101 and the second feed network 113 both have functions of power divider, filter, combiner, impedance matching, phase compensation, etc., and can be extensively applied to a multi-frequency and multi-system antenna, and have strong expansibility and diversity. The first feeding network 101 is connected to each radiating element 121 and performs signal transmission and power distribution, and the second feeding network 113 performs phase compensation. The utility model provides a cavity moves looks ware 110 need not through cable and other device switching. The losses associated with the cable connection are reduced, thereby improving the gain performance of the antenna.

In some improved embodiments, the length direction of the phase shifter 110 is parallel to the axial direction of the antenna array 120.

In some improved embodiments, there are two columns of phase shifters 110, two columns of phase shifters 110 are disposed oppositely, and the second feeding network 113 in two columns of phase shifters 110 is disposed oppositely on the inner side surface of the phase shifting cavity 114; the number of the first feed networks 101 is two, and the length directions of the two sets of the first feed networks 101 are parallel to the axial direction of the antenna array 120 and are respectively connected to the second feed networks 113 in the two rows of the phase shifters 110 in a one-to-one correspondence manner.

In some modified embodiments, the radiation units 121 include positive polarization units and negative polarization units, and two sets of the first feeding networks 101 are respectively connected to the positive polarization units and the negative polarization units in a one-to-one correspondence manner.

Specifically, after phase compensation is performed on the second feed networks 113 in the two columns of phase shifters 110 to synthesize a directional diagram, the signals are subjected to power distribution through the first feed network 101 and then sent to the positive polarization unit and the negative polarization unit in each radiation unit 121, and the signals are radiated through the positive polarization unit and the negative polarization unit.

In some improved embodiments, the phase shifting cavity 114 is integrally formed with the reflector plate 100. The phase-shifting cavity 114 does not need welding, so that the assembly is simpler, the performance consistency is good, and the automatic batch and stable production is realized.

In some improved embodiments, the first feeding network 101 and the second feeding network 113 are both coupled to ground.

It should be noted that, in the embodiment provided by the present invention, the array spacing between adjacent radiation units 121 is narrow, the upper surface of the reflection plate 100 is fully utilized to set the first feeding network 101, and the inner side surface of the phase shift cavity 114 is provided with the second feeding network 113, so as to improve the space utilization.

On the other hand, the embodiment of the utility model provides a still provide a base station antenna, including any one of the above-mentioned embodiments cavity phase shifter 110.

While the present invention has been described in considerable detail and with particular reference to several illustrated embodiments thereof, it is not intended to be limited to any such details or embodiments or any particular embodiments, but rather should be construed to effectively cover the intended scope of the invention by reference to the appended claims, which are given the broadest possible interpretation of such claims in view of the prior art.

Claims

1. A cavity phase shifter, comprising:

2. The cavity phase shifter as claimed in claim 1, wherein the length direction of the phase shifter is parallel to the axial direction of the antenna array.

3. The cavity phase shifter of claim 1, wherein the phase shifters are arranged in two rows, the two rows of phase shifters are arranged oppositely, and the second feeding networks in the two rows of phase shifters are arranged oppositely on the inner side surface of the phase shifting cavity; the length directions of the two groups of first feed networks are parallel to the axis direction of the antenna array and are respectively connected with the second feed networks in the two columns of phase shifters in a one-to-one correspondence manner.

4. The cavity phase shifter according to claim 3, wherein the radiating elements comprise positive polarization elements and negative polarization elements, and two sets of the first feeding networks are respectively connected with the positive polarization elements and the negative polarization elements in a one-to-one correspondence manner.

5. The cavity phase shifter of claim 1, wherein the phase shifting cavity is integrally formed with the reflector plate.

6. The cavity phase shifter of claim 1, wherein the first feed network and the second feed network are both coupled to ground.

7. A base station antenna comprising the cavity phase shifter of any one of claims 1 to 6.