A circularly polarized electrically adjustable antenna

Abstract

This utility model discloses a circularly polarized electrically tunable antenna, including a mounting plate, a radio frequency receiver, a filter, a power divider, N phase shifter assemblies, N+1 radiating elements, and a phase adjustment mechanism. The N phase shifter assemblies are located on the front of the mounting plate, and the N+1 radiating elements are located on the back of the mounting plate. The radio frequency receiver is connected to the input of the filter, and the output of the filter is connected to the input of the power divider. One output of the power divider is connected to one radiating element, and the other outputs of the power divider are connected to the remaining N radiating elements after passing through the N phase shifter assemblies. The phase adjustment mechanism is connected to the phase adjustment sections of the N phase shifter assemblies, and is used to synchronously adjust the phase of the N phase shifter assemblies. The phase adjustment mechanism synchronously drives multiple phase shifter assemblies to achieve global phase consistency of the array. A mechanical linkage method using a transmission rod and guide block ensures the synchronicity of the adjustment actions of each phase shifter.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a circularly polarized electrically adjustable antenna. Background Technology

[0002] In the design of circularly polarized antenna arrays, multiple spatially orthogonally arranged radiating elements are typically used, and circularly polarized wave synthesis is achieved by precisely controlling the phase difference between each element. Such antennas require maintaining a strict phase relationship to ensure axial ratio and radiation efficiency. However, existing technologies face the following significant problems:

[0003] On the one hand, changes in ambient temperature, switching of operating frequency bands, or long-term aging can cause phase shifter units to develop in-phase phase deviations. Traditional independent phase adjustment schemes require testing and calibrating each phase shifter individually, which is complex and time-consuming, and cannot quickly restore the initially optimized phase gradient. On the other hand, in frequency scanning arrays, changes in wavelength λ require real-time adjustment of phase settings to maintain beam pointing, but existing step-by-step phase adjustment mechanisms introduce instantaneous phase mismatch due to delay differences, leading to problems such as deterioration of polarization purity.

[0004] Therefore, there is an urgent need for a technical solution that can efficiently correct systematic phase errors, simplify maintenance procedures, and ensure global phase consistency of the array (referring to the ability of all elements in the array to maintain a preset precise phase relationship) in order to solve the core defects of the above-mentioned circularly polarized antennas in long-term stability and rapid recovery scenarios. Utility Model Content

[0005] In response to the problems raised in the background art, the purpose of this utility model is to propose a circularly polarized electrically adjustable antenna, which solves the problem of complex phase correction of existing antennas.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A circularly polarized electrically adjustable antenna includes a mounting plate, a radio frequency receiver, a filter, a power divider, N phase shifter assemblies, N+1 radiating elements, and a phase adjustment mechanism.

[0008] N phase shifter assemblies are disposed on the front side of the mounting plate, and the N phase shifter assemblies are arranged in an array along the length of the mounting plate; N+1 radiation units are disposed on the back side of the mounting plate, and the N+1 radiation units are arranged in an array along the length of the mounting plate.

[0009] The radio frequency receiver is electrically connected to the input terminal of the filter, and the output terminal of the filter is electrically connected to the input terminal of the power divider.

[0010] One output terminal of the power divider is electrically connected to one of the radiation units, and the other output terminals of the power divider are electrically connected to the remaining N radiation units after passing through N phase shifter assemblies respectively.

[0011] The phase adjustment mechanism is connected to the phase adjustment section of each of the N phase shifter assemblies, and the phase adjustment mechanism is used to synchronously adjust the phase of the N phase shifter assemblies.

[0012] Preferably, the phase shifter assembly includes a phase shifter tray, a phase shifter, an adjustment plate, and an adjustment arm, wherein the adjustment plate is the phase adjustment part of the phase shifter assembly;

[0013] The phase shifter tray is mounted on the mounting plate, the phase shifter is mounted on the phase shifter tray, the angle adjustment plate is mounted on the phase shifter via the adjustment arm, and the angle adjustment plate is movable relative to the phase shifter.

[0014] Preferably, the phase adjustment mechanism includes a drive unit, an adjusting screw, a transmission nut, a transmission rod, and N connecting parts. The adjusting screw is connected to the output end of the drive unit, the transmission nut is threadedly connected to the adjusting screw, the outer side of the transmission nut is connected to the transmission rod, the transmission rod extends along the length direction of the mounting plate, the connecting parts are installed on the transmission rod, and the N connecting parts are respectively connected to the N angle adjustment pieces.

[0015] Preferably, the phase adjustment mechanism further includes a guide block, which is mounted on the end of the mounting plate away from the drive unit;

[0016] The guide block includes a mounting part and a guide groove. The mounting part is connected to the mounting plate, and the transmission rod is slidably disposed inside the guide groove.

[0017] Preferably, the phase shifter assembly includes two first phase shifter assemblies and two second phase shifter assemblies, the first phase shifter assemblies and the second phase shifter assemblies have the same structure, the number of radiation units is 5, and the power divider assembly includes a 1-to-3 power divider and two power divider nodes;

[0018] The output of the filter is electrically connected to the input of the 1-to-3 power divider. One output of the 1-to-3 power divider is electrically connected to one of the radiating units. The other two outputs of the 1-to-3 power divider are electrically connected to the inputs of the two first phase shifter assemblies, respectively. The output of the first phase shifter assembly is electrically connected to the input of the power divider node. One output of the power divider node is electrically connected to the input of the second phase shifter assembly. The other output of the power divider node is electrically connected to one of the radiating units. The output of the second phase shifter assembly is electrically connected to the remaining radiating units.

[0019] Preferably, the driving unit is electrically connected to the filter.

[0020] Preferably, a metal reflector is provided on the back of the mounting plate, and the radiation unit is mounted on the surface of the metal reflector.

[0021] Preferably, it also includes a housing, wherein the mounting plate, filter, power divider assembly, phase shifter assembly, radiating unit and phase adjustment mechanism are disposed inside the housing, and the radio frequency receiver is disposed outside the housing.

[0022] Preferably, the mounting plate has housing support columns installed on its front and back sides, the housing support columns are vertically arranged on the mounting plate, and the height of the housing support columns is higher than the height of the filter, power divider assembly, phase shifter assembly, radiation unit and phase adjustment mechanism.

[0023] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0024] The phase adjustment mechanism synchronously drives multiple phase shifter components to achieve global phase consistency of the array. The mechanical linkage method of transmission rod and guide block ensures the synchronicity of the adjustment action of each phase shifter, effectively solving the instantaneous phase mismatch problem caused by the traditional step-by-step phase adjustment mechanism. It has the advantages of improving polarization purity, simplifying maintenance process and ensuring long-term stability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the rear structure of one embodiment of the present invention (excluding the outer casing);

[0026] Figure 2 This is a front structural schematic diagram of an embodiment of the present invention (excluding the outer shell);

[0027] Figure 3 This is a schematic diagram of the assembly of a phase adjustment mechanism and a phase shifter assembly according to an embodiment of the present invention;

[0028] Figure 4 yes Figure 3 A diagram from another angle.

[0029] The components include: mounting plate 1, support column 11, RF receiver 2, filter 3, 1-to-3 power divider 41, power divider node 42, phase shifter assembly 5, first phase shifter assembly 501, second phase shifter assembly 502, phase shifter tray 51, phase shifter 52, angle adjustment plate 53, adjustment arm 54, radiation unit 6, phase adjustment mechanism 7, drive unit 71, adjustment screw 72, transmission nut 73, transmission rod 74, connecting part 75, and signal input node 9. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include one or more of that feature.

[0033] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The following is in conjunction with the appendix Figures 1 to 4 The technical solution of this utility model will be further illustrated through specific implementation methods.

[0035] A circularly polarized electrically adjustable antenna includes a mounting plate 1, a radio frequency receiver 2, a filter 3, a power divider assembly, N phase shifter assemblies 5, N+1 radiating elements 6, and a phase adjustment mechanism 7.

[0036] N phase shifter assemblies 5 are disposed on the front side of the mounting plate 1, and the N phase shifter assemblies 5 are arranged in an array along the length direction of the mounting plate 1; N+1 radiation units 6 are disposed on the back side of the mounting plate 1, and the N+1 radiation units 6 are arranged in an array along the length direction of the mounting plate 1.

[0037] The radio frequency receiver 2 is electrically connected to the input terminal of the filter 3, and the output terminal of the filter 3 is electrically connected to the input terminal of the power divider.

[0038] One output terminal of the power divider is electrically connected to one of the radiation units 6, and the other output terminals of the power divider are electrically connected to the remaining N radiation units 6 after passing through N phase shifter assemblies 5 respectively.

[0039] The phase adjustment mechanism 7 is connected to the phase adjustment section of each of the N phase shifter assemblies 5, and the phase adjustment mechanism 7 is used to synchronously adjust the phase of the N phase shifter assemblies 5.

[0040] Mounting plate 1 refers to the rigid substrate that supports the antenna functional modules. It can be implemented using a metal or composite material plate, providing physical support and electromagnetic isolation for the power divider assembly, phase shifter assembly 5, and radiating unit 6. Phase shifter assembly 5 is the functional unit that implements signal phase modulation. It can be implemented using an adjustable dielectric phase shifter, changing the electromagnetic wave transmission path length through mechanical displacement. Phase adjustment mechanism 7 is the mechanical device that drives multiple phase shifter assemblies 5 to operate synchronously. Power divider assembly refers to the feed network structure that implements signal power distribution. It can be implemented using a microstrip line power divider, establishing the signal transmission path between the main radiating channel and the phase-shifting branch.

[0041] Specifically, after the radio frequency signal is input through the radio frequency receiver 2, out-of-band interference is filtered out by the filter 3, and the power divider divides the signal into a main path and a phase-shifting branch. The main path signal is directly connected to a radiating unit 6, and the branch signals are connected to other radiating units 6 after phase modulation by the phase shifter assembly 5. When it is necessary to adjust the phase relationship, the phase adjustment mechanism 7 drives the phase adjustment parts of all phase shifter assemblies 5 to move synchronously through a single drive source, so that the phase values ​​of each branch change by an equal amount. The array layout of the phase shifter assembly 5 on the front of the mounting plate 1 and the array layout of the radiating units 6 on the back ensure that the radiating units 6 correspond to the phase shifter assemblies, eliminating the influence of spatial distribution errors on the phase gradient. The synchronous adjustment mechanism ensures that the starting time and movement speed of the phase adjustment action of each branch are completely consistent, avoiding the instantaneous phase difference caused by step adjustment.

[0042] Compared to existing technologies, traditional solutions use independent drive mechanisms to drive each phase shifter component, resulting in instantaneous phase mismatch due to asynchronous drive signals. This solution rigidly couples the adjustment action through the mechanical linkage of the phase adjustment mechanism 7, ensuring that all phase shifter components 5 maintain displacement synchronicity during adjustment. Existing technologies require individual calibration of each phase shifter component; this solution achieves batch correction of systemic phase deviations through global synchronous adjustment, significantly reducing maintenance time. Traditional step-by-step phase adjustment may generate dynamic phase errors during frequency scanning; this solution eliminates action delay through synchronous adjustment, maintaining beam pointing stability.

[0043] The technical solution of this utility model effectively solves the problem of low efficiency in correcting the same-direction deviation of the phase shifter unit 5. The synchronization device of the phase adjustment mechanism 7 realizes the synchronous adjustment of the phase of multiple channels, avoiding the time loss of individual calibration. The synchronous adjustment mechanism eliminates the instantaneous phase mismatch caused by step operation, maintaining polarization purity and beam pointing accuracy. In addition, the double-sided array layout of the mounting plate optimizes the spatial phase gradient distribution, ensuring the consistency of the electromagnetic wave radiation direction.

[0044] Furthermore, the phase shifter assembly 5 includes a phase shifter tray 51, a phase shifter 52, an adjustment plate 53, and an adjustment arm 54, wherein the adjustment plate 53 is the phase adjustment part of the phase shifter assembly 5;

[0045] The phase shifter tray 51 is mounted on the mounting plate 1, the phase shifter 52 is mounted on the phase shifter tray 51, and the angle adjustment plate 53 is mounted on the phase shifter 52 via the adjustment arm 54. The angle adjustment plate 53 can move relative to the phase shifter 52.

[0046] The phase shifter tray 51 is rigidly connected to the mounting plate 1, keeping the spatial position of the phase shifter 52 fixed and eliminating phase reference drift caused by mechanical deformation. The phase shifter 52 is fixed to the phase shifter tray 51 by welding or snap-fit, ensuring its relative positional accuracy with the mounting plate 1. The adjustment plate 53 is linked to the adjustable component of the phase shifter 52 via the adjustment arm 54. When the external drive mechanism pushes the adjustment plate 53, the adjustment arm 54 transmits the displacement to the variable capacitor or adjustable transmission line inside the phase shifter 52, thereby changing the equivalent length of the transmission path. Since the adjustment plates 53 of all phase shifter assemblies are connected through the same transmission mechanism, the phase adjustment of multiple phase shifters 52 can be kept synchronized, avoiding phase gradient errors caused by adjusting them one by one.

[0047] Furthermore, the phase adjustment mechanism 7 includes a drive unit 71, an adjusting screw 72, a transmission nut 73, a transmission rod 74, and N connecting parts 75. The adjusting screw 72 is connected to the output end of the drive unit 71, the transmission nut 73 is threadedly connected to the adjusting screw 72, the outer side of the transmission nut 73 is connected to the transmission rod 74, the transmission rod 74 extends along the length direction of the mounting plate 1, the connecting parts 75 are installed on the transmission rod 74, and the N connecting parts 75 are respectively connected to the N angle adjustment pieces 53.

[0048] The drive unit 71 is a device capable of outputting rotational power, specifically a stepper motor or a servo motor, used to provide the power source for the rotation of the adjusting screw 72; furthermore, the drive unit 71 can be driven by a remote control unit. The adjusting screw 72 is a rod-shaped component with external threads, specifically a precision ball screw, which converts rotational motion into linear displacement through threaded engagement with the transmission nut 73. The transmission nut 73 is a sleeve component with internal threads, used to move axially when the adjusting screw 72 rotates. The transmission rod 74 is a rigid rod extending along the length of the mounting plate 1, used to transmit the linear displacement of the transmission nut 73 to all connecting parts 75. The connecting part 75 is a mechanical connector fixed to the transmission rod 74, used to synchronously transmit the displacement of the transmission rod 74 to each adjusting plate 53.

[0049] Specifically, when the drive unit 71 drives the adjusting screw 72 to rotate, the transmission nut 73 moves axially along the adjusting screw 72 under the action of the thread, driving the transmission rod 74 to translate along the length of the mounting plate 1. Since the transmission rod 74 extends to cover the distribution area of ​​all phase shifters 52, its displacement acts simultaneously on N adjusting plates 53 through N connecting parts 75. This rigid linkage structure ensures that the displacement of all adjusting plates 53 is consistent, thereby achieving synchronous phase adjustment of multiple phase shifters 52. The extension layout of the transmission rod 74 matches the spatial distribution of the phase shifter 52 array, ensuring that the positional changes of each adjusting plate 53 have spatial consistency.

[0050] The above technical solution enables synchronous phase adjustment of multiple phase shifters 52, avoiding instantaneous phase mismatch during step-by-step adjustment. This solution effectively maintains the preset phase relationship between all radiating elements 6 in the array, ensuring the axial ratio stability and radiation efficiency of the circularly polarized wave, while significantly reducing the operational complexity and time cost of phase calibration.

[0051] Furthermore, the phase adjustment mechanism 7 also includes a guide block 76, which is mounted on the end of the mounting plate 1 away from the drive unit 71;

[0052] The guide block 76 includes a mounting part 761 and a guide groove 762. The mounting part 761 is connected to the mounting plate 1, and the transmission rod 74 is slidably disposed inside the guide groove 762.

[0053] The guide block 76 is rigidly connected to the mounting plate 1 via the mounting part 761, forming a fixed support base. The end of the transmission rod 74 is embedded in the guide groove 762. When the drive unit 71 drives the adjusting screw 72 to rotate, the transmission rod 74 is pushed by the transmission nut 73 to move along the length direction of the mounting plate 1. Since the groove wall of the guide groove 762 cooperates with the outer surface of the transmission rod 74, the transmission rod 74 cannot produce lateral offset or swing during movement, and can only move along a preset straight trajectory. This axial constraint mechanism ensures that the multiple connecting parts 75 obtain completely consistent displacement when the transmission rod 74 moves, thereby driving the adjustment plates 53 of all phase shifter assemblies to move synchronously by the same distance, eliminating the phase adjustment error caused by the offset of the transmission rod 74.

[0054] Furthermore, the phase shifter assembly 5 includes two first phase shifter assemblies 501 and two second phase shifter assemblies 502, the first phase shifter assemblies 501 and the second phase shifter assemblies 502 have the same structure, the number of radiation units 6 is 5, and the power divider assembly includes a one-to-three power divider 41 and two power divider nodes 42.

[0055] The output terminal of the filter 3 is electrically connected to the input terminal of the 1-to-3 power divider 41. One output terminal of the 1-to-3 power divider 41 is electrically connected to one of the radiating units 6. The other two output terminals of the 1-to-3 power divider 41 are electrically connected to the input terminals of the two first phase shifter assemblies 501, respectively. The output terminal of the first phase shifter assembly 501 is electrically connected to the input terminal of the power divider node 42. One output terminal of the power divider node 42 is electrically connected to the input terminal of the second phase shifter assembly 502. The other output terminal of the power divider node 42 is electrically connected to one of the radiating units 6. The output terminal of the second phase shifter assembly 502 is electrically connected to the remaining radiating units 6.

[0056] The first phase shifter assembly 501 and the second phase shifter assembly 503 refer to phase adjustment units with the same mechanical structure and electrical characteristics. Specifically, they can be implemented using a combination of phase shifter trays, phase shifters, angle adjusters, and adjustment arms of the same specifications. Structural consistency ensures the synchronization of each component during phase adjustment. The 1-to-3 power divider 41 refers to a power distribution device that divides the input signal into three branches. Specifically, it can be implemented using a microstrip line power divider or a coaxial power divider, used to construct a symmetrical signal distribution network. The power divider node 42 refers to a branch structure with two output terminals. Specifically, it can be implemented using a T-junction or a Wilkinson power divider, used to distribute the signal to the radiation unit 6 and the next-stage phase shifter assembly 5.

[0057] Specifically, after being processed by filter 3, the signal is input to the 1-to-3 power divider 41, and the main path directly drives the central radiating unit 6. The two symmetrical branches undergo initial phase adjustment via the first phase shifter assembly 501, and then the power divider node 42 directs the signal to the radiating unit 6 and the second phase shifter assembly 502, respectively. The second phase shifter assembly 502 performs a second phase adjustment on the signal before driving the remaining unconnected radiating units 6. Through the series connection of the two-stage phase shifter assemblies, the radiating units 6 receive different phase adjustment amounts. When the phase adjustment mechanism 7 applies a drive, each phase shifter assembly 5 produces an equal phase change, thereby forming a phase gradient distribution among the five radiating units.

[0058] To further explain, the signal output from the phase shifter assembly 5 on the front of the mounting plate 1 and one signal output from the power divider assembly are electrically connected to the radiation unit one-to-one through the signal input node 9 respectively.

[0059] Furthermore, the driving unit 71 is electrically connected to the filter 3.

[0060] The drive signal of the drive unit 71 is processed by filter 3, which effectively suppresses the influence of external interference on the phase adjustment accuracy and ensures the stability of the preset phase relationship of all radiating units 6 in the array.

[0061] Furthermore, a metal reflector is provided on the back of the mounting plate 1, and the radiation unit 6 is mounted on the surface of the metal reflector.

[0062] The function of a metal reflector is to block electromagnetic waves from radiating behind the antenna, forcing energy to radiate mainly forward (in a specific direction), forming a directional beam, and improving the antenna's gain and directivity.

[0063] Specifically, the metal reflector and the back of the mounting plate 1 form a composite layered structure. During electromagnetic wave radiation, the metal reflector directionally reflects electromagnetic energy that is not effectively emitted by the radiating units, thereby enhancing the forward radiation field strength. The radiating units 6 are fixed to the surface of the metal reflector, maintaining a constant distance between them to avoid phase differences caused by mechanical assembly errors. The high thermal conductivity of the metal reflector allows it to quickly conduct the heat generated by the radiating units during operation, reducing material expansion differences caused by temperature gradients. Furthermore, the rigid support characteristics of the metal reflector can counteract the bending deformation of the mounting plate under temperature changes or external forces, ensuring that the relative positional accuracy between the radiating units remains within a preset range.

[0064] Furthermore, it also includes a housing, with the mounting plate 1, filter 3, power divider assembly, phase shifter assembly 5, radiation unit 6 and phase adjustment mechanism 7 disposed inside the housing, and the radio frequency receiver 2 disposed outside the housing.

[0065] Specifically, the housing integrates the filter 3, power divider assembly, phase shifter assembly 5, and radiating unit 6 within an internal cavity through a fully enclosed structure, forming an electromagnetic shielding environment to isolate the influence of external interference signals. The RF receiver 2 is externally mounted on the side wall of the housing and transmits signals to the internal filter 3 via a coaxial connector, avoiding attenuation of high-frequency signals during long-distance transmission.

[0066] Furthermore, housing support columns 11 are respectively installed on the front and back of the mounting plate 1. The housing support columns 11 are vertically arranged on the mounting plate 1, and the height of the housing support columns 11 is higher than the height of the filter 3, power divider assembly, phase shifter assembly 5, radiation unit 6 and phase adjustment mechanism 7.

[0067] The outer casing support column 11 forms a rigid support network through vertical installation, and its contact with the inner wall of the outer casing through its top plane, which is higher than all components, creates multi-point constraints to maintain the flatness of the mounting plate. When the antenna outer casing is compressed, it can protect important components such as the radiating element 6 and the feed network.

[0068] The technical principles of this utility model have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this utility model and should not be construed as limiting the scope of protection of this utility model in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this utility model without any inventive effort, and these embodiments will all fall within the scope of protection of this utility model.

Claims

1. A circularly polarized electrically adjustable antenna, characterized in that: It includes a mounting plate, RF receiver, filter, power divider, N phase shifter assemblies, N+1 radiating units, and phase adjustment mechanism; N phase shifter assemblies are disposed on the front side of the mounting plate, and the N phase shifter assemblies are arranged in an array along the length of the mounting plate; N+1 radiation units are disposed on the back side of the mounting plate, and the N+1 radiation units are arranged in an array along the length of the mounting plate. The radio frequency receiver is electrically connected to the input terminal of the filter, and the output terminal of the filter is electrically connected to the input terminal of the power divider. One output terminal of the power divider is electrically connected to one of the radiation units, and the other output terminals of the power divider are electrically connected to the remaining N radiation units after passing through N phase shifter assemblies respectively. The phase adjustment mechanism is connected to the phase adjustment section of each of the N phase shifter assemblies, and the phase adjustment mechanism is used to synchronously adjust the phase of the N phase shifter assemblies.

2. The circularly polarized electrically adjustable antenna according to claim 1, characterized in that: The phase shifter assembly includes a phase shifter tray, a phase shifter, an adjustment plate, and an adjustment arm, wherein the adjustment plate is the phase adjustment part of the phase shifter assembly; The phase shifter tray is mounted on the mounting plate, the phase shifter is mounted on the phase shifter tray, the angle adjustment plate is mounted on the phase shifter via the adjustment arm, and the angle adjustment plate is movable relative to the phase shifter.

3. A circularly polarized electrically adjustable antenna according to claim 2, characterized in that: The phase adjustment mechanism includes a drive unit, an adjusting screw, a transmission nut, a transmission rod, and N connecting parts. The adjusting screw is connected to the output end of the drive unit, the transmission nut is threadedly connected to the adjusting screw, the outer side of the transmission nut is connected to the transmission rod, the transmission rod extends along the length of the mounting plate, the connecting parts are installed on the transmission rod, and the N connecting parts are respectively connected to the N angle adjustment pieces.

4. A circularly polarized electrically adjustable antenna according to claim 3, characterized in that: The phase adjustment mechanism further includes a guide block, which is mounted on the end of the mounting plate away from the drive unit. The guide block includes a mounting part and a guide groove. The mounting part is connected to the mounting plate, and the transmission rod is slidably disposed inside the guide groove.

5. A circularly polarized electrically adjustable antenna according to claim 4, characterized in that: The phase shifter assembly includes two first phase shifter assemblies and two second phase shifter assemblies. The first phase shifter assemblies and the second phase shifter assemblies have the same structure. The number of radiation units is 5. The power divider assembly includes a 1-to-3 power divider and two power divider nodes. The output of the filter is electrically connected to the input of the 1-to-3 power divider. One output of the 1-to-3 power divider is electrically connected to one of the radiating units. The other two outputs of the 1-to-3 power divider are electrically connected to the inputs of the two first phase shifter assemblies, respectively. The output of the first phase shifter assembly is electrically connected to the input of the power divider node. One output of the power divider node is electrically connected to the input of the second phase shifter assembly. The other output of the power divider node is electrically connected to one of the radiating units. The output of the second phase shifter assembly is electrically connected to the remaining radiating units.

6. A circularly polarized electrically adjustable antenna according to claim 5, characterized in that: The driving unit is electrically connected to the filter.

7. A circularly polarized electrically adjustable antenna according to claim 6, characterized in that: The mounting plate has a metal reflector on its back, and the radiation unit is mounted on the surface of the metal reflector.

8. A circularly polarized electrically adjustable antenna according to claim 7, characterized in that: It also includes a housing, with the mounting plate, filter, power divider assembly, phase shifter assembly, radiating unit and phase adjustment mechanism disposed inside the housing, and the radio frequency receiver disposed outside the housing.

9. A circularly polarized electrically adjustable antenna according to claim 8, characterized in that: The mounting plate has housing support columns installed on its front and back sides, and the housing support columns are vertically arranged on the mounting plate. The height of the housing support columns is higher than the height of the filter, power divider, phase shifter assembly, radiation unit and phase adjustment mechanism.

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