Satellite with beam equalized wide-beam circularly polarized antennas

Abstract

The application discloses a satellite-borne wide-beam circularly polarized antenna with beam equalization and a satellite, and relates to the technical field of antennas.The antenna comprises a conical horn body, a partition type circular polarizer, a feeding port and an insulating base which are sequentially connected.The conical horn body is a conical structure with an umbrella-shaped metal radiation director, and the asymmetry of the traditional horn antenna directional diagram is effectively solved through multi-mode excitation of the circular polarizer, so that the beam equalization characteristic is realized.The loaded dielectric material is polytetrafluoroethylene, the mouth surface radius of the horn is equivalently reduced through dielectric loading, and the directional diagram beam width is widened.The partition type circular polarizer is adopted to realize good circular polarization effect.Through the joint action of the base and the umbrella-shaped metal radiation director, the interference of the antenna mounting surface on the wide-beam antenna radiation diagram is reduced, the requirement of the antenna on the mounting environment is lowered, the wide-beam circularly polarized radiation and reception of the antenna can be effectively realized, and the antenna has the advantages of wide beam, beam equalization and low axial ratio.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, and more particularly to a beam equalized spaceborne wide-beam circularly polarized antenna and a satellite. BACKGROUND

[0002] Satellite communication technology has rapidly developed since the 1960s and has become an important part of military and civilian communication. Spaceborne antennas, especially circularly polarized antennas, as key components, can effectively cope with satellite attitude changes, atmospheric influences and multipath interference, and have stronger adaptability and anti-interference ability compared with traditional linearly polarized antennas. With the progress of satellite communication technology, circularly polarized antennas have become the core technology for realizing efficient and stable communication in high-speed mobile and complex environments.

[0003] The antenna system of satellite TT&C is one of the core components of satellite communication and TT&C system, responsible for information transmission, state monitoring, data reception and command sending with the satellite. In satellite missions, the demand for antennas is crucial to ensure the stability of communication links. Traditional horn antennas are designed with narrow beams, which can improve radiation gain but require high antenna alignment accuracy. Attitude deviation may cause signal loss. Satellite attitude changes and orbit adjustments make antenna wide-beam and beam equalization design inevitable. In addition, the gain of traditional horn antennas decreases rapidly with the change of azimuth angle, resulting in unstable signal transmission in satellite communication in high dynamic scenarios.

[0004] The Chinese patent with the publication number CN112615162A provides a co-caliber three-frequency multi-mode horn antenna, which has a half-power beam width of only 49.6°, 21.1° and 11.0° in the L-band, S-band and C-band, respectively. The Chinese patent with the publication number CN117728187A discloses a wideband corrugated horn antenna, which has a beam equalization feature, but its half-power beam width is only 17°, and the antenna gain decreases significantly with the change of the azimuth angle. The Chinese patent with the publication number CN108232460A provides a small-caliber conical horn antenna with beam equalization, but its antenna beam is narrow, with a half-power beam width of only 40°. The patent with the application number 202422848923.4 provides a wideband wide-beam horn antenna, which combines a cuboid antenna main body, an internal horn-shaped waveguide and a waveguide side extending beam widening structure, and a feed probe and a polarizer, and the polarizer is vertically connected on the bottom surface of the antenna main body between the two feed probes, and the waveguide side is provided with an outwardly extending beam widening structure to realize a wide beam. However, the proposed antenna does not consider the interference of the installation environment on the wide-beam pattern. The patent with the publication number CN113193342A provides a dual-circularly polarized wideband wide-beam antenna, which uses a circular waveguide, a partition phase shifter, a metal ring group and a hollow slot group in the circularly polarized antenna to form directional radiation and introduce magnetic flow, thereby solving the problem of difficulty in realizing a wide half-power and wide axial ratio beam in a wide frequency band in the prior art.

[0005] Therefore, it is a key problem to be solved in the current satellite TT&C antenna technology to realize wide beam and beam equalization characteristics of the antenna and reduce the loss of gain change with the azimuth angle, especially for high-speed satellites, low-earth orbit (LEO) satellites and applications in dynamic environments. SUMMARY

[0006] In order to solve the problems in the prior art, the present application provides a beam equalization satellite-borne wide-beam circularly polarized antenna, which realizes wide-beam circularly polarized radiation and reception of the antenna, and has the advantages of wide beam, beam equalization, low axial ratio, etc.

[0007] In order to achieve the above-mentioned purpose, in one aspect, the present application provides a beam equalization satellite-borne wide-beam circularly polarized antenna, which comprises a conical horn body, a partition type circular polarizer and an insulating base connected in sequence along the axial direction, and a feed port connected to the partition type circular polarizer from the side; an umbrella-shaped metal radiation director is arranged on the outer ring of the conical horn body, a metal conical horn is arranged on the inner ring, and the umbrella-shaped metal radiation director and the metal conical horn are connected at the top; the metal conical horn is a hollow structure, and the inside of the metal conical horn is filled with a conical dielectric; the partition type circular polarizer comprises a cylindrical waveguide, a partition circular polarizer is arranged in the cylindrical waveguide, the partition circular polarizer is a multi-stage gradually changing stepped metal partition, and the partition circular polarizer is connected with the inner wall of the cylindrical waveguide.

[0008] Further, the septum circular polarizer is arranged at the center plane of the cylindrical waveguide, and the height of the septum circular polarizer is greater than 0.5 times the height of the cylindrical waveguide.

[0009] Further, the lowermost step of the multi-stage gradually-changing stepped metal septum is tightly attached to the cylindrical waveguide at both ends and extends upwards, and the width of the multi-stage gradually-changing stepped metal septum gradually decreases.

[0010] Further, the upper base of the circular polarizer and the lower base of the circular polarizer are arranged at both ends of the cylindrical waveguide, the bottom of the metal conical horn body is provided with a horn body metal fixed base, and the upper base of the circular polarizer is connected to the horn body metal fixed base through a screw.

[0011] Further, the material of the conical dielectric is polytetrafluoroethylene or polyimide.

[0012] Further, the horn body metal fixed base is flange-shaped, and the diameter of the bottom surface of the conical dielectric is greater than the diameter of the inner ring of the horn body metal fixed base.

[0013] Further, the feed port comprises a radio frequency coaxial connector, a fixed flange, and a glass insulator, the radio frequency coaxial connector is installed with the fixed flange through two fastening screws, the fixed flange is connected to the septum circular polarizer, the radio frequency coaxial connector and the glass insulator are connected in a plug-in manner, and coaxial feeding is performed below the side of the septum circular polarizer.

[0014] Further, the insulating base is an epoxy glass cloth board, the antenna and the umbrella-shaped metal radiation director are raised through the insulating base, and the materials of the conical horn body and the septum circular polarizer are copper.

[0015] Further, the overall size of the beam-equalized spaceborne wide-beam circularly polarized antenna is 3.29λ0*3.07λ0*4.54λ0, the wall thickness of the conical horn body is 0.064λ0, the height of the conical horn body is 1.36λ0, the height of the septum circular polarizer is 2.34λ0, and the height of the insulating base is 0.84λ0, wherein λ0 is the wavelength corresponding to the working center frequency f0 of the beam-equalized spaceborne wide-beam circularly polarized antenna.

[0016] On the other hand, the present application can provide a satellite comprising a beam-equalized spaceborne wide-beam circularly polarized antenna as described above.

[0017] Compared with the prior art, the present application has at least the following beneficial effects:

[0018] The application sets the conical horn body as a conical structure with an umbrella-shaped radiation director, effectively solves the asymmetry of the traditional horn antenna pattern through multi-mode excitation of the partition type circular polarizer, and realizes the beam equalization characteristics; through loading the aerospace available medium in the conical horn body, the equivalent aperture of the horn body is effectively reduced, the beam width is effectively widened compared with the traditional horn antenna, and the problems of narrow beam width of the horn antenna and excessive decline of the gain with the change of the azimuth angle are effectively solved; through the joint action of the base lifting antenna and the umbrella-shaped radiation director, the interference of the antenna installation surface on the wide beam antenna radiation pattern is reduced, and the adaptability of the antenna to the installation surface is improved.

[0019] The beam equalization satellite wide-beam circular polarized antenna provided by the application has the characteristics of wide beam, beam equalization and low axial ratio; the antenna radiation pattern is rotationally symmetrical along the normal direction; the axial ratio in the maximum radiation direction is less than 0.61 decibels, and the gain reaches 6.65 decibels; the half-power beam width is 92°; within the range of ±70° in the azimuth angle, the antenna gain is greater than -1 decibel, and within the range of ±61.5° in the azimuth angle, the axial ratio is less than 3 decibels.

[0020] Further, the multi-stage gradually changing stepped metal partition located in the center surface ensures the symmetry of the excitation mode, the height of the multi-stage gradually changing stepped metal partition is not less than 0.5 times the height of the waveguide, which ensures that the multi-stage gradually changing stepped metal partition has sufficient length to efficiently complete the linear circular polarization conversion, while minimizing the adverse effects on the waveguide transmission characteristics, to achieve the best circular polarization performance and bandwidth.

[0021] Further, the multi-stage gradually changing stepped metal partition can efficiently and strongly couple to excite the required waveguide mode, laying the foundation for polarization conversion, and the multi-stage step forms a gradually changing impedance matching section, enabling the excited mode to smoothly transition to the output port, reducing reflections caused by structural mutations, thereby expanding the working bandwidth and improving the port matching.

[0022] Further, through the base and screw connection, the precise alignment and firm fixation between the circular polarizer and the radiation horn body are ensured, which is used for maintaining the stability of the antenna phase center, the consistency of the electrical performance and bearing the severe vibration during the satellite launch.

[0023] Further, the material of the conical medium is polytetrafluoroethylene or polyimide, the dielectric constant of polytetrafluoroethylene is 2.1, the loss tangent value is small, polyimide is high-temperature resistant and has stable performance, which helps to optimize and stabilize the phase difference generated by the partition, reduce the insertion loss of the entire circular polarizer, and provide excellent thermal stability and space environment adaptability.

[0024] Further, the horn body metal fixing base is flange-shaped, the bottom surface diameter of the conical medium is greater than the diameter of the inner circle of the horn body metal fixing base, so that the medium body is reliably compressed and fixed, the flange-shaped base provides a compression surface, the medium bottom surface diameter is greater, and the medium can be clamped on the base to prevent displacement in a vibrating environment.

[0025] Further, the glass insulator realizes vacuum sealing, meets the working requirements of the spaceborne antenna in a high vacuum environment in space, prevents air leakage, realizes side and downward coaxial feeding, does not block the radiation aperture, is convenient for integration with a satellite internal radio frequency cable network, and adopts fastening screw connection: ensures that electrical contact between the feeding port and the waveguide is good and connection is firm, and avoids performance deterioration caused by micro-discharge or vibration.

[0026] Further, the insulating base realizes electrical insulation, separates the antenna main body from the satellite metal mounting platform, raises the antenna, reduces the interference of the antenna installation surface on the wide beam antenna radiation pattern, and greatly reduces the requirements of the antenna on the installation environment.

[0027] Copper material is adopted, and the copper material has good electrical conductivity, processability and thermal conductivity, can guarantee radiation efficiency and gain, is suitable for precise machining, and is conducive to heat dissipation.

[0028] Further, all key dimensions are given in units of working wavelengths, and the dimensions and proportional relationships of various components are obtained through optimized design, so that the comprehensive performance of the antenna is optimal.

[0029] Further, the satellite of the beam equalization spaceborne wide beam circularly polarized antenna according to the application realizes the wide beam and beam equalization characteristics of the antenna and reduces the loss of gain change with the azimuth angle. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor under the premise of the drawings.

[0031] Figure 1 It is a front view of the application;

[0032] Figure 2 It is a side view of the application;

[0033] Figure 3 It is a sectional view of the application;

[0034] Figure 4 It is a structural schematic view of the horn body in the application;

[0035] Figure 5It is a structure schematic view of the circular polarizer in the application;

[0036] Figure 6 It is a sectional view of the circular polarizer in the application;

[0037] Figure 7 It is a structure schematic view of the feeding port in the application;

[0038] Figure 8 It is a standing wave simulation curve of the application;

[0039] Figure 9 It is a simulation result of the directivity pattern (0° and 90° cross section) of the application at the f0 center frequency;

[0040] Figure 10 It is a simulation result of the axial ratio (0° and 90° cross section) of the application at the f0 center frequency;

[0041] Wherein: 1, conical horn body; 2, screw; 3, partition type circular polarizer; 4, feeding port; 5, insulating base; 101, conical dielectric; 102, umbrella-shaped metal radiation director; 103, metal conical horn body; 104, horn body metal fixed base; 301, upper base of circular polarizer; 302, cylindrical waveguide; 303, lower base of circular polarizer; 401, radio frequency coaxial connector; 402, fastening screw; 403, fixed flange; 404, glass insulator. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all of the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application. In the application, unless otherwise explicitly specified and limited, the terms “mounting”, “connecting”, “connecting”, “fixing” and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements.

[0043] In the description of the application, it should be understood that the terms “upper”, “lower”, “top”, “bottom”, “inner”, “outer”, “one side”, “one end”, “one side” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0044] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0045] As shown in Figure 1 , Figure 2 and Figure 3 , the present application provides a beam equalized spaceborne wide-beam circularly polarized antenna, which comprises a conical horn body 1, a partition type circular polarizer 3, a feed port 4 and an insulating base 5. The feed port 4 is connected to the partition type circular polarizer 3 from the side. The outer ring of the conical horn body 1 is provided with an umbrella-shaped metal radiation director 102, and the inner ring is provided with a metal conical horn body 103. The umbrella-shaped metal radiation director 102 and the metal conical horn body 103 are connected at the top. The metal conical horn body 103 is a hollow structure, and the inside of the metal conical horn body 103 is filled with a conical dielectric 101. The partition type circular polarizer 3 comprises a cylindrical waveguide 302, and a partition circular polarizer is arranged in the cylindrical waveguide 302. The partition circular polarizer is a multi-stage gradient stepped metal partition, and the partition circular polarizer is connected with the inner wall of the cylindrical waveguide 302. The umbrella-shaped metal radiation director 102 further widens the beam and realizes beam equalization. As an external waveguide / radiation structure, it can effectively control the diffusion angle of electromagnetic waves, especially compensating for the natural convergence of the horn's own beam at the high frequency end, so that the beam width is more uniform in the entire working frequency band. The conical dielectric 101 filled in the metal horn significantly reduces the physical size of the antenna, can optimize the impedance transformation in the horn, and improve the impedance matching of the antenna in the entire wide frequency band. The insertion of the metal partition in the circular waveguide will destroy the circular symmetry of the waveguide. The multi-stage gradient stepped partition constitutes a wideband impedance transformation and phase shift structure, which can decompose the input linearly polarized wave into two orthogonal modes with equal amplitude and 90-degree phase difference, so as to synthesize circularly polarized wave at the output end of the waveguide. The multi-stage gradient stepped partition helps to obtain good axial ratio in a wide frequency band.

[0046] Referring to Figure 3 and Figure 4 , the outer ring of the conical horn body 1 is provided with an umbrella-shaped metal radiation director 102, and the inner ring is provided with a metal conical horn body 103. The inside of the metal conical horn body 103 is filled with a conical dielectric 101. The umbrella-shaped metal radiation director 102 and the metal conical horn body 103 are connected at the top. The bottom of the metal conical horn body 103 is provided with a horn body metal fixed base 104. The horn body metal fixed base 104 is flange-shaped, and the horn body metal fixed base 104 is connected to the upper end of the partition type circular polarizer 3 through a screw 2. The bottom surface diameter of the conical dielectric 101 is greater than the inner ring diameter of the horn body metal fixed base 104. The conical dielectric 101 is preferably made of polytetrafluoroethylene, with a dielectric constant value of 2.1 and a loss tangent value of 0.001. It can also be made of polyimide.

[0047] By designing the conical horn body 1 as a conical structure with an umbrella-shaped metal radiation director 102, the asymmetry of the traditional horn antenna pattern is effectively solved through multi-mode excitation of the partition type circular polarizer 3, and the beam equalization characteristic is realized.

[0048] By loading the conical medium 101 available in aerospace inside the conical horn body 1, the equivalent aperture of the horn body is effectively reduced, the beam width is effectively widened compared with the traditional horn antenna, and the gain difference of the pattern with the azimuth angle is reduced.

[0049] In some possible embodiments, the height of the conical horn body 1 is 1.36λ0; the wall thickness of the metal conical horn body 103 is 0.064λ0; wherein λ0 is the wavelength corresponding to the working center frequency f0 of the satellite-borne wide-beam circularly polarized antenna.

[0050] As shown in Figure 5 The partition type circular polarizer 3 includes a circular polarizer upper base 301, a cylindrical waveguide 302, and a circular polarizer lower base 303. The cylindrical waveguide 302 is connected to the circular polarizer upper base 301 and the circular polarizer lower base 303 at both ends. The circular polarizer lower base 303 is used for connecting the antenna body and the insulating base 5. A plurality of bolt holes are provided on the circular polarizer lower base 303 and the insulating base, which facilitates the overall installation of the antenna on the satellite platform or test fixture. The plurality of bolt holes can be uniformly and firmly installed to prevent deformation or loosening caused by single-point fixation.

[0051] The conical horn body 1 and the partition type circular polarizer 3 are connected by screwing the horn body metal fixing base 104 and the circular polarizer upper base 301, which can realize circularly polarized radiation and fixation of the conical medium 101.

[0052] As shown in Figure 6 The partition type circular polarizer 3 realizes circular polarization characteristics through the cylindrical waveguide 302, and realizes circular polarization by inserting a multi-stage stepped metal partition in the cylindrical waveguide. Specifically, the cylindrical waveguide 302 adopts a six-stage stepped metal partition, which not only widens the bandwidth but also enables the partition type circular polarizer 3 to maintain relatively stable circular polarization performance at a higher frequency. The cylindrical waveguide 302 adopts a stepped design to generate circularly polarized waves. By adjusting the length and height of the partition, the incident electromagnetic wave generates the required circularly polarized electromagnetic wave after passing through the entire partition.

[0053] The multi-stage stepped metal partition is arranged along the inside center surface of the cylindrical waveguide 302. The lowermost stage of the multi-stage stepped metal partition is tightly attached to the cylindrical waveguide 302 at both ends, and extends upward. The width of the multi-stage stepped metal partition gradually decreases.

[0054] In some possible implementation manners, the overall size of the partitioned circular polarizer 3 is Φ2.10λ0×2.34λ0; wherein λ0 is the wavelength corresponding to the working center frequency f0 of the satellite-borne wide-beam circular polarized antenna.

[0055] As shown in Figure 7 , the feed port 4 includes a radio frequency coaxial connector 401, a fastening screw 402, a fixed flange 403, and a glass insulator 404; specifically, the radio frequency coaxial connector 401 is installed with the fixed flange 403 through two fastening screws 402; the radio frequency coaxial connector 401 and the glass insulator 404 are connected in a plug-in manner, and the feed port 4 is coaxially fed from below the side of the partitioned circular polarizer 3.

[0056] Preferably, the overall size of the satellite-borne wide-beam circular polarized antenna with beam equalization is 3.29λ0×3.07λ0×4.54λ0; the wall thickness of the conical horn body 1 is 0.064λ0, the height of the conical horn body 1 is 1.36λ0; the height of the partitioned circular polarizer 3 is 2.34λ0; the height of the insulating base 5 is 0.84λ0; wherein λ0 is the wavelength corresponding to the working center frequency f0.

[0057] The simulation of the present application is shown in Figure 8 、 Figure 9 and Figure 10 .

[0058] As shown in Figure 8 , the standing wave simulation result of the satellite-borne wide-beam circular polarized antenna with beam equalization proposed by the present application is shown in the working frequency band, and the port standing wave ratio is less than 1.40.

[0059] As shown in Figure 9 , the antenna radiation pattern along the normal direction is rotationally symmetrical, has the beam equalization characteristic, and the maximum radiation direction has a gain of 6.65 decibels; the half-power beam width is 92°, and the antenna has the wide-beam radiation characteristic; the antenna gain is greater than -1 decibel within the range of ±70° in the azimuth angle.

[0060] As shown in Figure 10 , the axial ratio simulation result of the satellite-borne wide-beam circular polarized antenna with beam equalization proposed by the present application at the center frequency f0 is shown, and the axial ratio at the maximum radiation direction is less than 0.61 decibel; the axial ratio is less than 3 decibels within the range of ±61.5° in the azimuth angle.

[0061] The principles and implementation manners of the present application are described by using specific examples, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A beam equalized spaceborne wide-beam circularly polarized antenna, characterized in that, The antenna comprises a conical horn body (1), a partition type circular polarizer (3) and an insulating base (5) connected in sequence along the axial direction, and a feeding port (4) is connected to the partition type circular polarizer (3) from the side; an umbrella-shaped metal radiation director (102) is arranged at the outer ring of the conical horn body (1), a metal conical horn body (103) is arranged at the inner ring, and the umbrella-shaped metal radiation director (102) and the metal conical horn body (103) are connected at the top; the metal conical horn body (103) is a hollow structure, and the metal conical horn body (103) is filled with a conical medium (101) inside; the partition type circular polarizer (3) comprises a cylindrical waveguide (302), a partition type circular polarizer is arranged in the cylindrical waveguide (302), the partition type circular polarizer is a multi-stage gradually changing stepped metal partition, and the partition type circular polarizer is connected with the inner wall of the cylindrical waveguide (302); and the diameter of the metal conical horn body (103) gradually decreases from the bottom to the top.

2. A beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, characterized in that, The partition type circular polarizer is arranged on the central surface of the cylindrical waveguide (302), and the height of the partition type circular polarizer is greater than 0.5 times the height of the cylindrical waveguide (302).

3. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The two ends of the lowest stage of the multi-stage gradually changing stepped metal partition are tightly attached to the cylindrical waveguide (302) and extend upwards, and the width of the multi-stage gradually changing stepped metal partition gradually decreases.

4. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The two ends of the cylindrical waveguide (302) are provided with a circular polarizer upper base (301) and a circular polarizer lower base (303), the bottom of the metal conical horn body (103) is provided with a horn body metal fixed base (104), and the circular polarizer upper base (301) is connected to the horn body metal fixed base (104) through a screw (2).

5. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The material of the conical medium (101) is polytetrafluoroethylene or polyimide.

6. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The horn body metal fixed base (104) is flange-shaped, and the bottom surface diameter of the conical medium (101) is greater than the inner ring diameter of the horn body metal fixed base (104).

7. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The feeding port (4) comprises a radio frequency coaxial connector (401), a fixed flange (403) and a glass insulator (404), the radio frequency coaxial connector (401) is installed on the fixed flange (403) through two fastening screws (402), the fixed flange (403) is connected to the partition type circular polarizer (3), the radio frequency coaxial connector (401) and the glass insulator (404) are connected in a plug-in manner, and coaxial feeding is performed below the partition type circular polarizer (3) side.

8. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The insulating base (5) is an epoxy glass cloth board, the antenna and the umbrella-shaped metal radiation director (102) are lifted through the insulating base (5), and the materials of the conical horn body (1) and the partition type circular polarizer (3) are copper.

9. The beam equalized spaceborne wide-beam circularly polarized antenna according to claim 1, wherein, The overall size of the beam equalized spaceborne wide-beam circular polarized antenna is 3.29λ0*3.07λ0*4.54λ0; the wall thickness of the conical horn body (1) is 0.064λ0, and the height of the conical horn body (1) is 1.36λ0; the height of the partition type circular polarizer (3) is 2.34λ0; the height of the insulating base (5) is 0.84λ0; wherein λ0 is the wavelength corresponding to the working center frequency f0 of the beam equalized spaceborne wide-beam circular polarized antenna.

10. A satellite, characterized by A beam equalized spaceborne wide-beam circularly polarized antenna comprising any one of claims 1-9.

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