CN117175207A

CN117175207A - Antenna

Info

Publication number: CN117175207A
Application number: CN202311262658.5A
Authority: CN
Inventors: 姜涛; 屈嘉琪; 李永忠
Original assignee: Prologis Communication Technology Suzhou Co Ltd
Current assignee: Prologis Communication Technology Suzhou Co Ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-05

Abstract

The invention discloses an antenna, and belongs to the technical field of antennas. The antenna comprises a reflecting plate, a radiation unit arranged on one side of the reflecting plate, at least one isolation assembly and at least one phase shifting unit, wherein the isolation assembly comprises a plurality of isolation walls arranged at intervals along a first direction, the radiation unit and at least one phase shifting unit electrically connected with the radiation unit are arranged between two adjacent isolation walls, and the phase shifting unit comprises a phase shifting circuit arranged opposite to the isolation walls and a phase shifting medium arranged between the phase shifting circuit and the isolation walls. The invention can reduce the occupied space of the phase shifter on the reflecting plate and is beneficial to the preparation of the low-profile antenna.

Description

Antenna

Technical Field

The present invention relates to the field of antenna technology, and in particular, to an antenna.

Background

In the coverage of a mobile communication network, an electrically-tunable base station antenna is one of key equipment of the coverage network, a phase shifter is one of the most core components of the electrically-tunable base station antenna, and the performance of the electrically-tunable base station antenna is directly determined by the performance of the phase shifter, so that the coverage quality of the network is affected. In the current antenna, the phase shifter and the phase shifting driving mechanism for adjusting the phase of the phase shifter are both arranged on the back of the reflecting plate, and occupy a large amount of back space, so that the space occupied by the antenna in the thickness direction is large, on one hand, the antenna is not beneficial to being manufactured into a low-profile antenna, and on the other hand, the wind load of the antenna is large, and the stability of the antenna is not beneficial.

In addition, in the current antenna, the phase shifter, the isolation wall and the reflecting plate are connected in a welding mode, so that on one hand, the assembly efficiency is low, the product consistency is poor, on the other hand, the isolation wall, the cavity and the like are easy to damage, fall, loosen and other bad phenomena along with the time, and the overall performance of the antenna is affected.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide an antenna, which not only can reduce the space occupation of the antenna and facilitate the preparation of a low-profile antenna, but also can improve the assembly efficiency and ensure better product consistency.

To achieve the above object, an embodiment of the present invention provides an antenna, including a reflecting plate, a radiation unit disposed on one side of the reflecting plate, at least one isolation assembly and at least one phase shift unit, where the isolation assembly includes a plurality of isolation walls disposed at intervals along a first direction, the radiation unit and at least one phase shift unit electrically connected to the radiation unit are disposed between two adjacent isolation walls, and the phase shift unit includes a phase shift circuit disposed opposite to the isolation walls and a phase shift medium disposed between the phase shift circuit and the isolation walls.

In one or more embodiments of the present invention, the antenna further includes a fixing portion for fixing the phase shift circuit.

In one or more embodiments of the present invention, the fixing portion and the partition wall form a slide rail; the sliding rail is matched with the phase shifting medium to guide the phase shifting medium to slide.

In one or more embodiments of the present invention, the fixing portion is integrally formed with the partition wall.

In one or more embodiments of the present invention, the fixing portion, the partition wall, and the reflection plate are integrally formed.

In one or more embodiments of the present invention, an insertion port is provided between the fixing portion and the partition wall, and the phase shift circuit is inserted and fixed through the insertion port.

In one or more embodiments of the present invention, a guiding portion for guiding the phase shift circuit to move is provided at the plug interface.

In one or more embodiments of the present invention, the conductive wire is disposed on a surface, an air-fillable gap is formed between the conductive wire and the isolation wall, and the air microstrip line is formed between the conductive wire, the air filled in the gap, and the isolation wall.

In one or more embodiments of the present invention, the radiating element includes a feeding plate and a radiating element disposed on the feeding plate; the feed plate protrudes toward the phase shift circuit to form a protruding portion for electrically connecting with the phase shift circuit.

In one or more embodiments of the invention, the phase shifting medium is provided with a fenestration for impedance matching.

In one or more embodiments of the present invention, two phase shifting units are disposed between two adjacent isolation walls, and each phase shifting unit corresponds to one isolation wall.

In one or more embodiments of the present invention, the reflection plate is provided with a plurality of isolation members, and the plurality of isolation members are spaced apart along the second direction.

In one or more embodiments of the present invention, the isolation walls in two adjacent isolation assemblies are in one-to-one correspondence and are in the same straight line.

In one or more embodiments of the present invention, the antenna further includes a phase shift driving mechanism disposed on the same side of the reflecting plate as the phase shift unit and the partition wall, and connected to the phase shift unit.

In one or more embodiments of the invention, the phase shift drive structure includes a drive gear; the phase shifting medium is provided with a rack matched with the driving gear.

Compared with the prior art, (1) the phase shifting unit and the isolation wall are arranged on the same side of the reflecting plate, and the phase shifting unit is a microstrip phase shifter formed by the phase shifting circuit, the phase shifting medium and the isolation wall, compared with the traditional phase shifter, the phase shifter can omit a cavity structure, can reduce the occupied space of the phase shifting unit, and is beneficial to the installation and layout of other parts.

(2) The invention avoids the occupation of the space on the other side of the reflecting plate by arranging the isolation component and the phase shifting unit on one side of the reflecting plate or arranging the isolation component and the phase shifting unit on one side of the reflecting plate, thereby reducing the space occupied by the antenna, being beneficial to manufacturing the antenna with low profile, reducing the wind load of the antenna and improving the stability of the antenna,

drawings

Fig. 1 is a perspective view of an antenna according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is a cross-sectional view of an antenna according to an embodiment of the present invention;

fig. 5 is an enlarged view of part C of fig. 4.

The main reference numerals illustrate:

10-reflecting plate, 20-isolation assembly, 21-isolation wall, 30-phase shifting unit, 31-phase shifting circuit, 311-dielectric substrate, 312-wire, 313-interface, 32-phase shifting medium, 321-windowing, 40-radiating unit, 41-feeding plate, 411-feeding network, 411 a-protruding part, 42-radiating oscillator, 50, fixed part, 60-phase shifting driving mechanism, a-power source, b-gear and c-transmission shaft.

Detailed Description

The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.

Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.

As shown in fig. 1 to 5, according to the antenna of the preferred embodiment of the present invention, by providing the phase shift unit 30 on the side of the reflecting plate 10 provided with the partition wall 21, the phase shift unit 30 is a microstrip phase shifter formed by the phase shift circuit 31, the phase shift medium 32 and the partition wall 21, that is, the cavity structure of the conventional phase shifter can be omitted by forming the microstrip phase shifter by the partition wall 21, the phase shift circuit 31 and the phase shift medium 32, thereby further reducing the occupied space of the phase shifter on the reflecting plate and facilitating the preparation of the low-profile antenna.

Specifically, as shown in fig. 1, which is a perspective view of the disclosed antenna, the antenna includes a reflecting plate 10, at least one isolation component 20, at least one phase shift unit 30, and a radiation unit 40. Wherein,

the reflection plate 10 is used for reflection of electromagnetic waves. The isolation assembly 20 is disposed on one side of the reflective plate 10, and includes a plurality of isolation walls 21 disposed at intervals along the first direction X, each isolation wall 21 is preferably integrally formed with the reflective plate 10, and the isolation walls 21 are used for isolating electromagnetic waves.

The phase shifting unit 30 is disposed on one side of the reflecting plate 10 and on the same side of the reflecting plate 10 as the isolation assembly 20, and is used for changing the phase of the signal, thereby adjusting the downtilt angle of the antenna. In each of the isolation assemblies 20, a receiving area is formed between two adjacent isolation walls 21, in which at least one radiation element 40 and at least one phase shift element 30 electrically connected to the radiation element 40 may be disposed. In the embodiment, two phase shift units 30 are preferably disposed in the accommodating area, however, in other embodiments, one phase shift unit 30 may be disposed between two adjacent partition walls 21 according to practical requirements.

The radiating element 40 comprises a feeding plate 41 with a feeding network 411 and a radiating element 42 arranged on the feeding plate 41 and electrically connected to the feeding network 411, the feeding network 411 connecting the phase shifting unit 30 and the radiating element 42 for signal transmission. Of course, it is understood that in other embodiments, the radiating element 40 may be only the radiating element 42.

In the invention, the phase shifting unit 30 and the isolation wall 21 are arranged on the same side of the reflecting plate 10, so that on one hand, the occupation of the space on the other side of the reflecting plate 10 is avoided, and further, the occupied space of the antenna is reduced (as shown in fig. 1, the occupation of the space of the antenna in the thickness direction is reduced, and the thickness direction is the direction perpendicular to the first direction X and the second direction Y), thereby being beneficial to manufacturing the antenna with a low profile, reducing the wind load of the antenna and improving the stability of the antenna.

As shown in fig. 2, 4 and 5, the phase shifting unit 30 includes a phase shifting circuit 31 and a phase shifting medium 32, the phase shifting circuit 31 is opposite to the isolation wall 21, the phase shifting medium 32 is disposed between the phase shifting circuit 31 and the isolation wall 21, and the phase shifting medium 32 can move relative to the phase shifting circuit 31 under the action of force, so as to realize the adjustment of signal phase. In order to reduce the space occupied by the phase shift unit 30, in the present invention, the phase shift unit 30 is a microstrip phase shifter formed by the phase shift circuit 31, the phase shift medium 32 and the isolation wall 21, and compared with the conventional phase shifter, the cavity structure can be omitted, so that the space occupied by the phase shift unit 30 can be reduced, and the installation layout of other parts is facilitated.

Further, in the phase shifting unit 30, it is preferable to provide a single phase shifting medium 32, so as to further reduce the size of the phase shifting unit 30 and reduce the space occupied by the phase shifting unit. That is, by adopting the single phase shifting medium 32 and the phase shifting circuit 31 to cooperate to realize signal phase adjustment, the size of the phase shifting unit 30 can be further reduced, for example, the thickness of the phase shifting unit 30 (i.e., the size of the phase shifting unit 30 in the first direction) can be reduced, and thus the occupied space of the phase shifting unit 30 can be reduced, which is beneficial to the layout of other parts.

As shown in fig. 2 and 5, the phase shift circuit 31 includes a dielectric substrate 311 and a wire 312, and the wire 312 is provided on an end surface of the dielectric substrate 311 facing the phase shift medium 32. An air-fillable gap is formed between the conductive wire 312 and the isolation wall 21, so that an air microstrip line structure is formed between the conductive wire 312, the air filled in the gap and the isolation wall, thereby reducing signal transmission loss. This is because the air medium is filled between the conductor 312 and the isolation wall 21 in the air microstrip line, and the loss of the air medium is infinitely close to zero, so that the air microstrip line can effectively reduce the loss and improve the antenna gain compared with other microstrip lines which are not air medium.

As shown in fig. 5, the phase shifting medium 32 is provided with a plurality of windows 321, and the windows 321 are used for impedance matching.

As shown in fig. 1, 3 and 4, the antenna further includes a fixing portion 50 disposed on the reflecting plate 10, where the fixing portion 50 is used to fix the phase shift circuit 31, so as to ensure that the phase shift circuit 31 remains relatively stable. Further, the fixing portion 50 and the partition wall 21 together form a sliding rail, and the sliding rail can cooperate with the phase shifting medium 32 to guide the phase shifting medium 32.

In this embodiment, the fixing portion 50 is integrally formed with the partition wall 21 to improve structural stability. Further, the fixing portion 50, the partition wall 21 and the reflecting plate 10 are formed into an integrated structure optimally, so that on one hand, the stability of the antenna structure can be improved, the antenna performance is more stable, on the other hand, assembly processes such as welding among parts can be avoided, the assembly process is simplified, the assembly efficiency is improved, and good product consistency is ensured.

As shown in fig. 1 and 5, an insertion port 313 is provided between the fixing portion 50 and the partition wall 21, and the dielectric substrate 311 is inserted and fixed through the insertion port 313. A microstrip line structure is formed between the conductor 312 and the partition wall 21 on the dielectric substrate 311 after being inserted in place, and the microstrip line structure can be directly electrically connected to the feeding network 411 in the feeding board 41. In a specific implementation, the feeding network 411 has a protruding portion 411a protruding toward the phase shift circuit 31, and the protruding portion 411a is used for electrically connecting with the phase shift circuit 31, so that the phase shift circuit 31 after being plugged in place can be directly electrically connected with the feeding network 411. Of course, in other embodiments, the phase shift circuit 31 may be fixed in the cavity 31 in a non-plugging manner.

Further, a guiding portion (not shown) is disposed at the inserting port 313, and the guiding portion is used for guiding the medium substrate 311 to move, so that the conductive wire 312 on the medium substrate 311 is accurately electrically connected to the feeding network 411. The guide herein includes, but is not limited to, a guide slot.

According to the invention, the phase shifting circuit 31 is fixed in a plugging manner, so that the assembly of the phase shifting circuit 31 is facilitated, and meanwhile, the maintenance and the replacement of the phase shifting circuit 31 are also facilitated. Meanwhile, the inserted phase shifting circuit 31 can be directly connected with the radiating unit 40, and the solid cable or metal belt wire connection is not required to be added, so that the assembly efficiency is improved, and meanwhile, the stability and reliability of the phase shifting unit 30 are improved.

As shown in fig. 1 and 4, the reflective plate 10 is provided with a plurality of isolation assemblies 20, and the plurality of isolation assemblies 20 are arranged at intervals along a second direction Y, which is perpendicular to the first direction X. Further, in the adjacent two isolation assemblies 20, the isolation walls 21 are arranged in a one-to-one correspondence and on the same straight line, as shown in fig. 1, the isolation assembly 20 on the upper left side is arranged at intervals from the isolation assembly 20 on the lower right side, the isolation wall 21 in the isolation assembly 20 on the upper left side corresponds to the isolation wall 21 in the isolation assembly 20 on the lower right side, and the isolation wall 21 on the upper left side is on the same straight line as the isolation wall 21 on the lower right side. By arranging the partition walls 21 in one-to-one correspondence and in the same straight line in the second direction Y, it is convenient to drive the phase shift units 30 housed in the two partition assemblies 20 to perform phase adjustment using one drive mechanism. Of course, in other embodiments, two adjacent isolation assemblies 20 may be arranged in a staggered manner, and may be selected according to actual requirements.

As shown in fig. 1 and 4, the reflecting plate 10 is further provided with a phase-shifting driving mechanism 60, the phase-shifting unit 30 and the partition wall 21 are disposed on the same side of the reflecting plate 10, and the phase-shifting driving mechanism 60 is connected with the phase-shifting medium 32 of the phase-shifting unit 30 and is used for driving the phase-shifting medium 32 in the phase-shifting unit 30 to move so as to adjust the phase. Each phase shift unit 30 may be provided with a phase shift driving mechanism 60 alone, and of course, a plurality of phase shift units 30 may share a phase shift driving mechanism 60. Through setting up phase shift actuating mechanism 60 and phase shift unit 30, partition wall 21 all in the homonymy of reflecting plate 10, on the one hand can effectively reduce the space occupation of antenna, on the other hand avoids overturning reflecting plate 10 repeatedly and carries out the installation of spare part, does benefit to the equipment of spare part promptly, reduces the assembly complexity in the production process, improves production efficiency. Meanwhile, the real-time state of the antenna is also convenient to observe, and the problem is convenient to observe and analyze when the antenna has a problem.

As shown in fig. 1 and 3, when each of the phase shift units 30 may be provided with a phase shift driving mechanism 60 alone, the phase shift driving mechanism 60 includes a power source a and a gear b. Wherein, power source a links to each other with gear b to drive gear b rotation. The gear b is further in meshed connection with the corresponding phase shifting medium 32 to drive the phase shifting medium 32 to shift phase. In specific implementation, when the phase adjustment is performed, the power source a drives the gear b to rotate, and the gear b further drives the phase shifting medium 32 to move relative to the phase shifting circuit 31, so that the phase adjustment is realized.

When the plurality of phase shift units 30 share the phase shift driving mechanism 60, the plurality of phase shift units 30 housed in the same isolation assembly 20 share the phase shift driving mechanism 60 and the plurality of phase shift units 30 housed in adjacent two isolation assemblies 20 share the phase shift driving mechanism 60.

Specifically, when the plurality of phase shift units 30 housed in the same isolation assembly 20 share a phase shift driving mechanism 60, the phase shift driving mechanism 60 includes a power source a, a transmission shaft b, and a transmission shaft c. Wherein, the transmission shaft c extends along the first direction X for power transmission, and in practice, the transmission shaft c is rotatably arranged on the reflecting plate 10 through a shaft supporting piece; the power source a is connected with the transmission shaft c and is used for driving the transmission shaft c to rotate; a plurality of gears b are arranged on the transmission shaft c and rotate along with the rotation of the transmission shaft c, each gear b corresponds to the phase shifting medium 32 of one phase shifting unit 30, and the gears b are in meshed connection with the corresponding phase shifting medium 32 (i.e. racks meshed with the gears b are arranged in the phase shifting medium 32), for example, 16 phase shifting units 30 are provided with 16 phase shifting mediums 32, and thus 16 gears b are arranged on the transmission shaft c. In specific implementation, when the phase adjustment is performed, the power source a drives the transmission shaft c to rotate, and the transmission shaft c drives each gear b to rotate in the rotation process, and each gear b further drives the corresponding phase shifting medium 32 to move relative to the phase shifting circuit 31, so that the phase adjustment is realized.

As shown in fig. 1 and 3, among the plurality of isolation assemblies 20 spaced apart along the second direction Y, each of the two isolation assemblies 20 is further divided into a group in which the two isolation assemblies 20 share a phase shift driving mechanism 60, and as shown in fig. 1, the upper left isolation assembly 20 and the lower right isolation assembly 20 are further divided into a group in which the two isolation assemblies 20 share a phase shift driving mechanism 60. For an odd number of isolation assemblies 20, the phase shift units 30 housed by the remaining isolation assemblies 20 may share a phase shift drive mechanism 60. In this case, the phase shift driving mechanism 60 includes a power source a, a transmission shaft c, and a plurality of gears b. Wherein the transmission shaft c is arranged in an extending way along the first direction X and is used for power transmission; the power source a is connected with the transmission shaft c and is used for driving the transmission shaft c to rotate; a plurality of gears b are arranged on the transmission shaft c and rotate along with the rotation of the transmission shaft c, each gear b corresponds to one phase shifting medium 32, and the gears b are in meshed connection with the corresponding phase shifting medium 32. In specific implementation, when the phase adjustment is performed, the power source a drives the transmission shaft c to rotate, and each gear b is driven to rotate in the rotation process of the transmission shaft c, and each gear b further drives the corresponding phase shifting medium 32 to move relative to the phase shifting circuit 31, so that the phase adjustment of the plurality of phase shifting units 30 is realized.

Further, in the two isolation assemblies 20, the two phase shift media 32 on the same line are integrally formed, and the two phase shift media 32 share a gear b. By integrally molding the two phase shift media 32, the stability of the structure can be improved, the installation of parts can be reduced, and the assembly efficiency can be improved. Meanwhile, by sharing the gear b, the synchronous adjustment is realized, meanwhile, the installation of parts is reduced, the space occupation is reduced, and the like.

In this embodiment, the power source a includes, but is not limited to, a motor, and at least one transmission mechanism, such as a gear transmission mechanism, may be disposed between the motor and the transmission shaft c, and may be disposed according to practical requirements. The transmission mechanism is arranged to change the force transmission direction, so that the installation and layout of other parts are facilitated.

According to the invention, the gear b transmission mode is adopted to control the movement of the phase shifting medium 32, and the plurality of phase shifting mediums 32 are driven by the same phase shifting driving mechanism 60, so that the space occupation is reduced, the plurality of phase shifting mediums 32 are integrally moved, and the phase shifting precision of the phase shifting unit 30 is more accurate.

The phase adjustment is performed by driving the phase shift unit 30 in the gear b transmission mode in the above embodiment, however, a phase shift driving mechanism 60 in a non-gear b transmission mode may be used. In particular, the method comprises the steps of,

when each phase shift unit 30 may be provided with a phase shift driving mechanism 60 alone, the phase shift driving mechanism 60 includes a power source, a screw, and a slider. The power source is connected with the screw rod and used for driving the screw rod to rotate, the screw rod can be arranged in an extending mode along the second direction Y, the sliding block is in threaded connection with the screw rod and can move relative to the screw rod, and the sliding block is connected with the phase shifting medium 32. In the specific implementation, the power source drives the screw rod to rotate, the screw rod drives the sliding block to move through threaded fit between the screw rod and the sliding block in the rotation process, and the sliding block further drives the moving medium to move, so that the phase adjustment of the phase shifting unit 30 is realized.

When the plurality of phase shift units 30 accommodated in the same isolation assembly 20 share a phase shift driving mechanism 60, the phase shift driving mechanism 60 includes a power source, a screw, a slider and a transmission rod. The power source is connected with the screw rod and used for driving the screw rod to rotate, the screw rod is arranged in an extending mode along the second direction and used for enabling the sliding block to move along the second direction, the sliding block is in threaded connection with the screw rod and can move relative to the screw rod, the sliding block is connected with the transmission rod, and the transmission rod is connected with each phase shifting medium 32. In specific implementation, the power source drives the screw rod to rotate, the screw rod drives the sliding block to move through threaded fit between the screw rod and the sliding block in the rotation process, and the sliding block further drives each moving medium to move through the transmission rod, so that the phase adjustment of each phase shifting unit 30 is realized.

Further, among the plurality of isolation assemblies 20 spaced apart along the second direction Y, each two isolation assemblies 20 are further divided into a group in which the two isolation assemblies 20 share a phase shift driving mechanism 60. For an odd number of isolation assemblies 20, the phase shift units 30 housed by the remaining isolation assemblies 20 may share a phase shift drive mechanism 60. At this time, the phase shift driving mechanism 60 includes a power source, a screw, a first slider, a second slider, a first transmission rod, and a second transmission rod. The power source is connected with the screw rod and is used for driving the screw rod to rotate, the screw rod is arranged in an extending mode along the second direction and used for enabling the sliding block to move in the second direction, the first sliding block and the second sliding block are in threaded connection with the screw rod and can move relative to the screw rod, the first sliding block is connected with the first transmission rod, the second sliding block is connected with the second transmission rod, the first transmission rod is connected with the phase shifting medium 32 of the phase shifting unit 30 accommodated by the isolation assembly 20, and the second transmission rod is connected with the phase shifting medium 32 of the phase shifting unit 30 accommodated by the other isolation assembly 20. In specific implementation, the power source drives the screw rod to rotate, the screw rod drives the first slide block and the second slide block to move through threaded fit between the screw rod and the first slide block and the second slide block in the rotating process, the first slide block further drives each moving medium to move through the first transmission rod, and the second slide block further drives each moving medium to move through the second transmission rod to adjust the phase of each phase shifting unit 30.

Further, in the present embodiment, the phase shift driving mechanism 60 further includes a transmission conversion mechanism, through which the phase shift units accommodated in the two isolation assemblies 20 can be simultaneously phase-adjusted or the phase shift units accommodated in the single isolation assembly 20 can be simultaneously phase-adjusted. The transmission shifting mechanism herein includes, but is not limited to, a gear structure.

The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. The antenna is characterized by comprising a reflecting plate, a radiation unit, at least one isolation assembly and at least one phase shifting unit, wherein the radiation unit, the at least one isolation assembly and the at least one phase shifting unit are arranged on one side of the reflecting plate, the isolation assembly comprises a plurality of isolation walls which are arranged at intervals along a first direction, the radiation unit and the at least one phase shifting unit which is electrically connected with the radiation unit are arranged between every two adjacent isolation walls, and each phase shifting unit comprises a phase shifting circuit which is arranged opposite to the isolation wall and a phase shifting medium which is arranged between the phase shifting circuit and the isolation wall.

2. The antenna of claim 1, further comprising a fixing portion for fixing the phase shift circuit.

3. The antenna of claim 2, wherein the fixed portion and the partition wall form a sliding rail; the sliding rail is matched with the phase shifting medium to guide the phase shifting medium to slide.

4. The antenna of claim 3, wherein the fixing portion is integrally formed with the partition wall.

5. The antenna of claim 3, wherein the fixing portion, the partition wall, and the reflecting plate are integrally formed.

6. The antenna of claim 2, wherein an interface is provided between the fixing portion and the partition wall, and the phase shift circuit is inserted and fixed through the interface.

7. The antenna of claim 6, wherein a guide portion for guiding movement of the phase shift circuit is provided at the jack.

8. The antenna of claim 1, wherein the phase shift circuit comprises a dielectric substrate and a wire, the wire is disposed on an end surface of the dielectric substrate facing the phase shift medium, an air-fillable gap is formed between the wire and the isolation wall, and the air microstrip line is formed between the wire, the air filled in the gap and the isolation wall.

9. The antenna of claim 1, wherein the radiating element comprises a feed plate and a radiating element disposed on the feed plate; the feed plate protrudes toward the phase shift circuit to form a protruding portion for electrically connecting with the phase shift circuit.

10. The antenna of claim 1, wherein the phase shifting medium is provided with a fenestration for impedance matching.

11. The antenna of claim 1, wherein two of said phase shifting units are disposed between two adjacent isolation walls, each of said phase shifting units corresponding to one isolation wall.

12. The antenna of claim 1, wherein the reflector plate is provided with a plurality of isolation elements spaced apart along the second direction.

13. The antenna of claim 12, wherein the isolation walls of adjacent isolation assemblies are in one-to-one correspondence and collinear.

14. The antenna of claim 1, further comprising a phase shift drive mechanism disposed on the same side of the reflector as the phase shift unit and the partition wall and connected to the phase shift unit.

15. The antenna of claim 14, wherein the phase-shifting drive structure comprises a drive gear; the phase shifting medium is provided with a rack matched with the driving gear.