Phase shifters, antennas and base station antenna feed systems

Abstract

The present application provides a phase shifter, antenna, and base station antenna feed system. The phase shifter includes multiple sidewalls that enclose an inner cavity of the phase shifter, allowing for the placement of a phase shifting circuit within the inner cavity. The multiple sidewalls include a first sidewall having a first rib protruding toward the inner cavity. The first rib forms a screw hole on the side facing away from the inner cavity, allowing for the installation of structures such as a radome or reflector on the phase shifter. In this solution, the first rib is located on one side of the inner cavity of the phase shifter. Therefore, this solution can reduce the size of the phase shifter, facilitate antenna miniaturization, and thereby improve the antenna integration level of the base station antenna feed system.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and specifically to a phase shifter, an antenna, and a base station antenna feed system. Background Art

[0002] With the advancement of wireless communication technology, base stations are able to support more and more communication frequency bands. As a result, the structure of base station antennas is becoming more and more complex, and the integration level of antennas on a single antenna surface is also increasing. To improve the integration level of base station antennas, the demand for miniaturization, weight reduction, and wind load reduction of base station antennas is becoming more and more urgent.

[0003] Antennas typically include an array of radiating elements and a phase shifter. The radiating element array is connected to the phase shifter, which can be used to control the amplitude and phase distribution of the radiating element array to achieve specific antenna radiation characteristics. The phase shifter typically includes a cavity, which is equipped with a circuit board or sheet metal strips. Because the cavity is usually a structural component and needs to be connected to other structures, such as the antenna cover or the reflector, an auxiliary mounting structure is required in the cavity, resulting in a larger cavity size and making it difficult to miniaturize the antenna. Summary of the Invention

[0004] The present application provides a phase shifter, an antenna, and a base station antenna feed system to achieve miniaturization of the phase shifter, reduce the antenna space occupied by the antenna, and improve the antenna integration of the base station antenna feed system.

[0005] In a first aspect, the present application provides a phase shifter comprising multiple sidewalls that enclose an inner cavity of the phase shifter, thereby enabling the placement of a phase shifting circuit within the inner cavity. The multiple sidewalls include a first sidewall having a first rib protruding toward the inner cavity. The first rib forms a screw hole on the side facing away from the inner cavity, allowing the screw hole to be used to mount structures such as an antenna cover or a reflector on the phase shifter. In this solution, the first rib is located on one side of the inner cavity of the phase shifter. Therefore, this solution can reduce the size of the phase shifter, facilitate antenna miniaturization, and thereby improve the antenna integration level of the base station antenna feed system.

[0006] When the first rib is specifically provided, the first rib and the first sidewall can be integrally formed. In this solution, the first rib and the first sidewall can be formed using a single molding process, or the multiple sidewalls and the first rib forming the phase shifter can be formed using a single molding process. For example, the multiple sidewalls and the first rib can be formed using a casting process.

[0007] In a specific technical solution, the multiple side walls may include a first side wall, a second side wall, a third side wall, and a fourth side wall. The above-mentioned side walls are connected in sequence to form the above-mentioned inner cavity. The phase shifter may also include a retaining wall connected between the first side wall and the third side wall, so that the phase shifter can be divided into different parts to connect different radiation unit arrays or different polarization unit arms of the same array. The first hole rib is arranged on the retaining wall and is an integral structure with the retaining wall. In this embodiment, the retaining wall can be used to prepare and form the first hole rib, which is conducive to reducing the space occupied by the first hole rib and improving the miniaturization of the phase shifter.

[0008] When configuring the first rib, it can be symmetrical with respect to the retaining wall. This approach maximizes the use of the retaining wall structure to form the first rib, minimizing the additional structure introduced by the first rib, thus facilitating miniaturization of the phase shifter. Furthermore, this approach allows the cavities on both sides of the first rib to be symmetrical, facilitating the placement of internal structures within the phase shifter's cavity.

[0009] In another technical solution, the third sidewall of the phase shifter is further provided with a second rib protruding toward the inner cavity, which can also form a screw hole. In this solution, multiple sidewalls of the phase shifter can be provided with ribs, and the ribs protrude toward the inner cavity of the phase shifter, which is conducive to further improving the miniaturization of the phase shifter. Of course, in other embodiments, the second sidewall can also be provided with a third rib protruding toward the inner cavity, and the fourth sidewall can be provided with a fourth rib protruding toward the inner cavity. In short, the sidewalls of the phase shifter can be selected to prepare ribs facing the inner cavity according to actual product requirements.

[0010] The phase shifter may further include a phase shift circuit, which is disposed in the inner cavity of the phase shifter. In a specific technical solution, the phase shift circuit may be a circuit board or a sheet metal strip.

[0011] In a specific technical solution, the phase-shifting circuit may be a circuit board. Specifically, a first circuit board is disposed between the retaining wall and the second side wall. The distance between the first circuit board and the retaining wall is greater than the distance between the first circuit board and the second side wall. In other words, the first circuit board is disposed toward the second side wall to avoid the first perforated rib. A second circuit board may also be disposed between the retaining wall and the fourth side wall. The distance between the second circuit board and the retaining wall is greater than the distance between the second circuit board and the fourth side wall. In other words, the first circuit board is disposed toward the fourth side wall to avoid the first perforated rib.

[0012] In a second aspect, the present application provides an antenna comprising a radome, a radiating element array, and a phase shifter, wherein the radiating element array is connected to the phase shifter, and the radiating element array and the phase shifter are disposed within the radome. The phase shifter comprises a plurality of side walls, which enclose an inner cavity of the phase shifter, thereby enabling a phase shifting circuit to be disposed within the inner cavity. The plurality of side walls comprises a first side wall, which is provided with a first rib protruding toward the inner cavity. The first rib forms a screw hole on a side away from the inner cavity, thereby enabling the radome or reflector, etc., to be mounted on the phase shifter through the screw hole. In this solution, the first rib is located on one side of the inner cavity of the phase shifter. Therefore, this solution can reduce the size of the phase shifter, facilitate miniaturization of the antenna, and thereby improve the antenna integration of the base station antenna feed system.

[0013] When the first rib is specifically provided, the first rib and the first sidewall can be integrally formed. In this solution, the first rib and the first sidewall can be formed using a single molding process, or the multiple sidewalls and the first rib forming the phase shifter can be formed using a single molding process. For example, the multiple sidewalls and the first rib can be formed using a casting process.

[0014] In a specific technical solution, the multiple side walls may include a first side wall, a second side wall, a third side wall, and a fourth side wall. The above-mentioned side walls are connected in sequence to form the above-mentioned inner cavity. The phase shifter may also include a retaining wall connected between the first side wall and the third side wall, so that the phase shifter can be divided into different parts to connect different radiation unit arrays or different polarization unit arms of the same array. The first hole rib is arranged on the retaining wall and is an integral structure with the retaining wall. In this embodiment, the retaining wall can be used to prepare and form the first hole rib, which is conducive to reducing the space occupied by the first hole rib and improving the miniaturization of the phase shifter.

[0015] When configuring the first rib, it can be symmetrical with respect to the retaining wall. This approach maximizes the use of the retaining wall structure to form the first rib, minimizing the additional structure introduced by the first rib, thus facilitating miniaturization of the phase shifter. Furthermore, this approach allows the cavities on both sides of the first rib to be symmetrical, facilitating the placement of internal structures within the phase shifter's cavity.

[0016] In another technical solution, the third sidewall of the phase shifter is further provided with a second rib protruding toward the inner cavity, which can also form a screw hole. In this solution, multiple sidewalls of the phase shifter can be provided with ribs, and the ribs protrude toward the inner cavity of the phase shifter, which is conducive to further improving the miniaturization of the phase shifter. Of course, in other embodiments, the second sidewall can also be provided with a third rib protruding toward the inner cavity, and the fourth sidewall can be provided with a fourth rib protruding toward the inner cavity. In short, the sidewalls of the phase shifter can be selected to prepare ribs facing the inner cavity according to actual product requirements.

[0017] The phase shifter may further include a phase shift circuit, which is disposed in the inner cavity of the phase shifter. In a specific technical solution, the phase shift circuit may be a circuit board or a sheet metal strip.

[0018] In a specific technical solution, the phase-shifting circuit may be a circuit board. Specifically, a first circuit board is disposed between the retaining wall and the second side wall. The distance between the first circuit board and the retaining wall is greater than the distance between the first circuit board and the second side wall. In other words, the first circuit board is disposed toward the second side wall to avoid the first perforated rib. A second circuit board may also be disposed between the retaining wall and the fourth side wall. The distance between the second circuit board and the retaining wall is greater than the distance between the second circuit board and the fourth side wall. In other words, the first circuit board is disposed toward the fourth side wall to avoid the first perforated rib.

[0019] The antenna also includes a reflector. The phase shifter has a rectangular cross-section, and the length of the phase shifter's cross-section perpendicular to the reflector is greater than the length of its cross-section parallel to the reflector. This solution reduces the antenna's area in the plane where the reflector resides, thereby reducing the antenna's occupied antenna surface space and reducing wind loads on the antenna.

[0020] When installing the antenna, the first rib of the phase shifter may be connected to the antenna cover or the reflector, or the first rib may be connected to both the antenna cover and the reflector, which is not limited in this application.

[0021] In a third aspect, the present application provides a base station antenna feed system, which includes the antenna of the second aspect and may also include a pole or a tower, with the antenna mounted on the tower or pole. The antenna of the base station antenna feed system has a high degree of antenna integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a system architecture applicable to an embodiment of the present application;

[0023] Figure 2 This is a structural diagram of a base station antenna feed system according to a possible embodiment of the present application;

[0024] Figure 3 A schematic diagram of the composition of an antenna according to a possible embodiment of the present application;

[0025] Figure 4 This is a structural diagram of an antenna in a possible embodiment of the present application;

[0026] Figure 5 This is a structural diagram of a phase shifter in a possible embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of a phase shifter cavity in a possible embodiment of the present application;

[0028] Figure 7 FIG. 1 is a schematic structural diagram of a phase shifter cavity in another possible embodiment of the present application.

[0029] Reference numerals:

[0030] 1-antenna; 11-radome;

[0031] 12-radiation element array; 13-reflector;

[0032] 14-feed network; 141-transmission components;

[0033] 142-calibration network; 143-phase shifter;

[0034] 1431-phase shifter cavity; 01-side wall;

[0035] 011-first side wall; 012-second side wall;

[0036] 013-third side wall; 014-fourth side wall;

[0037] 02-first hole reinforcement; 03-inner cavity;

[0038] 04-screw hole; 05-retaining wall;

[0039] 06-first circuit board; 07-second circuit board;

[0040] 08- screw hole protrusion; 09- mounting plate;

[0041] 1432-phase shift circuit; 144-combiner;

[0042] 145-filter; 2-pole;

[0043] 3-antenna adjustment bracket; 5-RF processing unit;

[0044] 6-baseband processing unit; 7-cable line. DETAILED DESCRIPTION

[0045] To facilitate understanding of the antenna and base station antenna feed system provided in the embodiments of the present application, the following describes their application scenarios. Figure 1 A schematic diagram of a system architecture applicable to the embodiment of the present application is shown as an example. Figure 1As shown, the application scenario may include a base station and a terminal. Wireless communication can be achieved between the base station and the terminal. The base station can be located in a base station subsystem (BBS), a terrestrial radio access network (UMTS terrestrial radio access network, UTRAN) or an evolved universal terrestrial radio access (E-UTRAN), and is used to provide cell coverage of wireless signals to achieve communication between the terminal device and the wireless network. Specifically, the base station can be a base transceiver station (BTS) in a global system for mobile communications (GSM) or a (code division multiple access, CDMA) system, or a node B (NB) in a wideband code division multiple access (WCDMA) system, or an evolved node B (eNB or eNodeB) in a long term evolution (LTE) system, or a wireless controller in a cloud radio access network (CRAN) scenario. Alternatively, the base station may also be a relay station, an access point, a vehicle-mounted device, a wearable device, a g-node (gNodeB or gNB) in a new radio (NR) system, or a base station in a future evolved network, etc., and the embodiments of the present application are not limited thereto.

[0046] Figure 2 This diagram shows a possible structure of a base station antenna feed system. A base station antenna feed system typically includes an antenna 1, a mast 2, and an antenna adjustment bracket 3. The base station antenna 1 includes a radome 11. This radome 11 has excellent electrical electromagnetic wave penetration characteristics and mechanical properties that can withstand harsh external environments, thereby protecting the antenna 1 from external influences. The antenna 1 can be mounted on a mast 2 or tower using the antenna adjustment bracket 3 to facilitate signal reception and transmission.

[0047] In addition, the base station may also include a radio frequency processing unit 5 and a baseband processing unit 6. For example, the radio frequency processing unit 5 may be used to perform frequency selection, amplification, and down-conversion processing on the signal received by the antenna 1, and convert it into an intermediate frequency signal or a baseband signal and send it to the baseband processing unit 6, or the radio frequency processing unit 5 may be used to convert the baseband processing unit 6 or the intermediate frequency signal into an electromagnetic wave through the antenna 1 after up-conversion and amplification processing and send it out. The baseband processing unit 6 can be connected to the feeding network of the antenna 1 through the radio frequency processing unit 5. In some embodiments, the radio frequency processing unit 5 may also be referred to as a remote radio unit (RRU), and the baseband processing unit 6 may also be referred to as a baseband unit (BBU).

[0048] In one possible embodiment, Figure 2 As shown, the RF processing unit 5 can be integrated with the antenna 1, and the baseband processing unit 6 is located at the remote end of the antenna 1. In other embodiments, the RF processing unit 5 and the baseband processing unit 6 can also be located at the remote end of the antenna 1. The RF processing unit 5 and the baseband processing unit 6 can be connected by a cable 7.

[0049] More specifically, please refer to Figure 2 and Figure 3 , Figure 3 This is a schematic diagram of the composition of an antenna of a possible embodiment of the present application. Figure 3 As shown, the antenna 1 of the base station may include a radiation element array 12 and a reflector 13. The radiation element array 12 may also be referred to as an antenna element, an antenna vibrator, etc., and it can effectively send or receive antenna signals. In the antenna 1, the frequencies of different radiation element arrays 12 may be the same or different. The reflector 13 may also be referred to as a base plate, an antenna panel, or a reflective surface, etc., and it may be made of metal. When the antenna 1 receives a signal, the reflector 13 may reflect the antenna signal and focus it on the receiving point. When the antenna 1 transmits a signal, the signal that hits the reflector 13 is reflected and transmitted. The radiation element array 12 is usually placed on one side of the reflector 13, which not only greatly enhances the antenna 1's signal reception or transmission capability, but also blocks and shields interference from other radio waves on the back side of the reflector 13 (the back side of the reflector 13 in this application refers to the side of the reflector 13 opposite to the side where the radiation element array 12 is set) that interfere with the antenna signal reception.

[0050] In the base station's antenna 1, the radiating element array 12 is connected to a feed network 14. The feed network 14 is typically composed of controlled impedance transmission lines. The feed network 14 can feed signals to the radiating element array 12 at a specific amplitude and phase, or transmit received signals to the baseband processing unit 6 of the base station at a specific amplitude and phase. Specifically, in some embodiments, the feed network 14 can achieve different radiation beam directions through a transmission component 141, or connect to a calibration network 142 to obtain calibration signals required by the system. The feed network 14 may include a phase shifter 143 to change the maximum direction of antenna signal radiation. The feed network 14 may also include modules for expanding performance, such as a combiner 144, which can be used to combine signals of different frequencies into one channel for transmission through the antenna 1; or, in reverse, to divide the signals received by the antenna 1 into multiple channels based on different frequencies and transmit them to the baseband processing unit 6 for processing. Another example is a filter 145, which can be used to filter out interference signals.

[0051] Figure 4 This is a schematic diagram of the structure of the antenna in a possible embodiment of the present application. Figure 4 As shown, the antenna includes a radome 11, a radiating element array 12, and a phase shifter 143. The radiating element array 12 is connected to the phase shifter 143, which can be used to control the amplitude and phase distribution of the radiating element array 12 to achieve specific antenna radiation characteristics. The radiating element array 12 and the phase shifter 143 are disposed within the radome 11, thereby protecting the radiating element array 12 and the phase shifter 143.

[0052] Please continue to refer to Figure 4 The phase shifter 143 specifically includes a phase shifter cavity 1431 and a phase shifting circuit 1432, which can be a circuit board or sheet metal strip. The phase shifter cavity 1431 can serve as the ground plane for the phase shifter 143 and also as a structural component of the antenna, for mounting the antenna radome 11 or other supporting components. The antenna can also include a reflector 13, which can be a metal plate or a frequency selective surface. The phase shifter 143 has a rectangular cross-section, and the length L of the cross-section perpendicular to the reflector 13 is greater than the length M of the cross-section of the phase shifter cavity 1431 parallel to the reflector 13. In other words, the smaller sidewall O1 of the phase shifter cavity 1431 is parallel to the reflector 13, while the larger sidewall O1 of the phase shifter cavity 1431 is perpendicular to the reflector 13. This solution can reduce the area of ​​the antenna on the plane where the reflector 13 is located, which is beneficial to reducing the roof space occupied by the antenna and reducing the wind load on the antenna.

[0053] Figure 5 This is a structural diagram of a phase shifter in a possible embodiment of the present application. Figure 6 This is a schematic diagram of the structure of the phase shifter cavity in a possible embodiment of the present application. Figure 5 and Figure 6 As shown, the phase shifter cavity 1431 includes a plurality of side walls 01 and a first rib 02. The plurality of side walls 01 are interconnected to enclose an inner cavity 03, which can be used to set the circuit board or sheet metal strip of the phase shifter 143. The plurality of side walls 01 include a first side wall 011. The first rib 02 is located on the side of the first side wall 011 facing the inner cavity 03, and the first rib 02 protrudes from the first side wall 011, that is, the first rib 02 is located on the inner side of the first side wall 011. A screw hole 04 is formed on the side of the first rib 02 away from the inner cavity, and the screw hole 04 is used to connect the phase shifter cavity 1431 to other structures. In this embodiment, the first rib 02 is located on the side of the side wall 01 facing the inner cavity 03, that is, on the inner side of the phase shifter cavity 1431. Compared with the case where the first rib 02 is arranged outside the cavity, this solution can reduce the volume of the phase shifter cavity 1431, thereby reducing the volume of the phase shifter, which is conducive to miniaturization of the antenna.

[0054] It is worth noting that in order to connect the phase shifter cavity 1431 with other structures, the phase shifter cavity 1431 needs to have a screw hole 04. Therefore, a rib is formed at a set position of the phase shifter cavity 1431, and a screw hole 04 is made on the rib. The above rib is called the first hole rib 02.

[0055] When configuring the first rib 02, the first rib 02 can be integrally formed with the first sidewall 011 having the first rib 02. This solution provides a higher structural strength for the phase shifter cavity 1431. Furthermore, it facilitates the use of an integrated molding process to manufacture the phase shifter cavity 1431. For example, injection molding can be used to manufacture the entire phase shifter cavity 1431 in one step.

[0056] Figure 7 This is a schematic structural diagram of a phase shifter cavity in another possible embodiment of the present application. Figure 7 As shown, the plurality of side walls 01 specifically include a first side wall 011, a second side wall 012, a third side wall 013 and a fourth side wall 014. The first side wall 011, the second side wall 012, the third side wall 013 and the fourth side wall 014 are sequentially connected to enclose the inner cavity 03 of the phase shifter cavity 1431. Figure 7In the illustrated embodiment, the phase shifter cavity 1431 further includes a retaining wall 05 connected between the first sidewall 011 and the third sidewall 013, dividing the inner cavity 03 of the phase shifter cavity 1431 into a first sub-cavity and a second sub-cavity, respectively, for accommodating different phase shifter circuit boards or sheet metal strips. For example, the phase shifter cavity 1431 can include two sub-cavities, each for connecting to the two poles of a dual-polarized radiating element array 12. Alternatively, the phase shifter cavity 1431 can include multiple sub-cavities for connecting to multiple radiating element arrays 12. In this embodiment, when providing the first rib 02, the first rib 02 and the retaining wall 05 can be integrally formed. In this solution, the retaining wall 05 and the first rib 02 can partially overlap, meaning that the retaining wall 05 can be used to form the first rib 02, thereby reducing the space occupied by the first rib 02 and enhancing the miniaturization of the phase shifter 143.

[0057] In a specific embodiment, the retaining wall 05 , the second side wall 012 and the fourth side wall 014 may be arranged in parallel, so that the structure of the phase shifter cavity 1431 is relatively regular, which facilitates the preparation and installation of the phase shifter cavity 1431 .

[0058] Please continue to refer to Figure 6 When the phase shifter 143 includes circuit boards, a first circuit board 06 can be positioned between the retaining wall 05 and the second side wall 012, and a second circuit board 07 can be positioned between the retaining wall 05 and the fourth side wall 014. The distance between the first circuit board 06 and the retaining wall 05 is greater than the distance between the first circuit board 06 and the second side panel, allowing the first circuit board 06 to avoid the threaded holes connected to the retaining wall 05. The distance between the second circuit board 07 and the retaining wall 05 is greater than the distance between the second circuit board 07 and the fourth side panel, allowing the second circuit board 07 to avoid the threaded holes connected to the retaining wall 05.

[0059] When configuring the first rib 02, it can be symmetrical with respect to the retaining wall 05. This solution maximizes the use of the retaining wall 05 structure to form the first rib 02, reducing the additional structure introduced by the first rib 02 and facilitating the miniaturization of the phase shifter 143. Furthermore, this solution allows the cavities on both sides of the first rib 02 to be symmetrical, facilitating the configuration of the internal structure within the phase shifter cavity 1431.

[0060] Each side surface of the phase shifter cavity 1431 can be provided with a structure for engaging screws. For example, in the above embodiment, the third side wall 013 of the phase shifter 143 can be provided with a second rib protruding toward the inner cavity. The second rib is provided on the side of the third side wall facing the inner cavity. Of course, in other embodiments, the second side wall can also be provided with a third rib protruding toward the inner cavity, and the fourth side wall can be provided with a fourth rib protruding toward the inner cavity. In short, the side walls of the phase shifter can be selected to form ribs facing the inner cavity based on actual product requirements.

[0061] The first rib 02 may be connected to the antenna cover 11, or may be connected to a structure such as a reflector 13. This application does not impose any limitation on this.

[0062] Or, as Figure 5 As shown, in another embodiment, the first side wall 011 of the phase shifter cavity 1431 may also have the above-mentioned first hole rib 02, and the third side wall 013 may have a screw hole protrusion 08, and the screw hole protrusion 08 is arranged on the side of the third side wall 013 away from the first side wall 011.

[0063] In addition, please continue to refer to Figure 5 The above-mentioned phase shifter cavity 1431 can also be connected to a mounting plate 09, and screw holes are prepared on the mounting plate 09 to facilitate connection of the phase shifter cavity 1431 with other structures.

[0064] Obviously, those skilled in the art may make various modifications and variations to this application without departing from the scope of protection of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. A phase shifter, characterized in that: The phase shifter comprises a plurality of side walls, wherein the plurality of side walls enclose an inner cavity of the phase shifter, a first side wall of the plurality of side walls is provided with a first hole rib protruding toward the inner cavity, and a screw hole is formed on a side of the first hole rib away from the inner cavity; The plurality of side walls include a first side wall, a second side wall, a third side wall, and a fourth side wall, wherein the first side wall, the second side wall, the third side wall, and the fourth side wall are sequentially connected to form the inner cavity; the phase shifter further includes a retaining wall connected between the first side wall and the third side wall, and the first rib and the retaining wall are an integral structure; A first circuit board is arranged between the blocking wall and the second side wall, and the distance between the first circuit board and the blocking wall is greater than the distance between the first circuit board and the second side wall; a second circuit board is arranged between the blocking wall and the fourth side wall, and the distance between the second circuit board and the blocking wall is greater than the distance between the second circuit board and the fourth side wall.

2. The phase shifter according to claim 1, wherein The first rib and the first side wall are an integral structure.

3. The phase shifter according to claim 1 or 2, wherein: The first rib is symmetrical with respect to the retaining wall.

4. The phase shifter according to any one of claims 1 to 3, wherein: The third side wall is provided with a second hole rib protruding toward the inner cavity.

5. The phase shifter according to any one of claims 1 to 4, characterized in that: It also includes a phase shift circuit, which is arranged in the inner cavity.

6. An antenna, characterized in that: The invention comprises a radome, a radiation element array and a phase shifter, wherein the radiation element array is connected to the phase shifter, and the radiation element array and the phase shifter are arranged in the radome; The phase shifter includes a plurality of side walls, the plurality of side walls enclosing an inner cavity of the phase shifter, a first side wall of the plurality of side walls being provided with a first hole rib protruding toward the inner cavity, a screw hole being formed on a side of the first hole rib away from the inner cavity; The plurality of side walls include a first side wall, a second side wall, a third side wall, and a fourth side wall, wherein the first side wall, the second side wall, the third side wall, and the fourth side wall are sequentially connected to form the inner cavity; the phase shifter further includes a retaining wall connected between the first side wall and the third side wall, and the first rib and the retaining wall are an integral structure; A first circuit board is arranged between the blocking wall and the second side wall, and the distance between the first circuit board and the blocking wall is greater than the distance between the first circuit board and the second side wall; a second circuit board is arranged between the blocking wall and the fourth side wall, and the distance between the second circuit board and the blocking wall is greater than the distance between the second circuit board and the fourth side wall.

7. The antenna according to claim 6, wherein The first rib and the first side wall are an integral structure.

8. The antenna according to claim 7, wherein The first rib is symmetrical with respect to the retaining wall.

9. The antenna according to any one of claims 6 to 8, characterized in that: The third side wall is provided with a second hole rib protruding toward the inner cavity.

10. The antenna according to any one of claims 6 to 9, characterized in that It also includes a phase shift circuit, which is arranged in the inner cavity.

11. The antenna according to any one of claims 6 to 10, characterized in that: A reflective plate is also included. The cross section of the phase shifter is rectangular. The length of the cross section of the phase shifter in a direction perpendicular to the reflective plate is greater than the length of the cross section of the phase shifter in a direction parallel to the reflective plate.

12. The antenna according to claim 11, wherein The first rib is connected to the radome and / or the reflector.

13. A base station antenna feed system, characterized in that: The invention comprises the antenna according to any one of claims 6 to 12.

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