Precision adjusting method for reflecting surface and molded surface of split satellite antenna, and satellite antenna

Abstract

The invention provides a split satellite antenna reflecting surface, a profile precision adjusting method and a satellite antennae, the antenna reflecting surface comprises a plurality of reflecting lobes, a central positioning connection structure and an outer edge positioning connection structure, each reflecting lobe comprises a reflecting working surface, the central positioning connection structure comprises a central positioning ring, and the outer edge positioning connection structure comprises an outer edge positioning ring. The center positioning ring is provided with an inner end positioning datum plane, the radial inner ends are attached to and detachably fixed to the inner end positioning datum plane, the outer edge positioning connecting structure comprises a blind rivet fastening column, the blind rivet fastening column comprises a positioning flange, the positioning flange is provided with an outer end positioning datum plane, and the radial outer ends are attached to and detachably fixed to the outer end positioning datum plane. According to the invention, the defects in the prior art that the overall precision deviation of a reflection surface emission curve is large and the requirement of an interchangeable high-frequency satellite antenna on the profile precision of the reflection surface cannot be met due to the fact that the connection positioning reference is on the back surface or the side surface of the reflection surface are effectively overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite antenna design, and in particular to a method for adjusting the reflection surface and profile accuracy of a split-petal satellite antenna, and a satellite antenna. Background Art

[0002] The satellite antenna reflector is the main key equipment of the satellite antenna, which plays the role of reflecting and focusing radio waves and transmitting signals. With the popularization of satellite constellations, the requirements for portable satellite communication systems are getting higher and higher. The traditional reflector manufacturing is a customized product. In order to ensure that the occupancy interference of the reflector is reduced, the reflector of the split-petal satellite antenna disclosed in the prior art often adopts a corresponding connection structure on the back or side of the reflector to achieve a reliable connection between the two adjacent lobes of the transmitting surface. Objectively, the thickness of each lobe of the reflector may be different, which leads to the formation of steps between the two adjacent reflector lobes when connected from the side or back of the reflector, which leads to a large deviation in the overall accuracy of the reflector curve, and cannot meet the surface accuracy requirements of the reflector for interchangeable high-frequency satellite antennas. Based on the above-mentioned deficiencies in the prior art, the present invention is proposed. Summary of the invention

[0003] The split-lobe satellite antenna reflecting surface and surface accuracy adjustment method and satellite antenna designed in the present invention can overcome the shortcomings of the prior art that the connection positioning reference of the split-lobe satellite antenna reflecting surface is on the back or side of the reflecting surface, resulting in a large overall accuracy deviation of the reflecting curve of the reflecting surface, and cannot meet the surface accuracy requirements of interchangeable high-frequency satellite antennas for the reflecting surface.

[0004] The object of the present invention is to provide a segmented satellite antenna reflecting surface, comprising a multi-petal reflecting petal body, each petal of the reflecting petal body comprising a reflecting working surface and a back side of the petal body on the opposite side of the reflecting working surface, and also comprising a center positioning connection structure and an outer edge positioning connection structure, each petal of the reflecting petal body has a radial inner end and a radial outer end, the center positioning connection structure comprises a center positioning ring, the center positioning ring has an inner end positioning reference surface corresponding to the side surface of each radial inner end facing the reflecting working surface, each radial inner end is attached to and detachably fixed on the inner end positioning reference surface, the outer edge positioning connection structure comprises a rivet fastening column, the rivet fastening column comprises a positioning flange, the positioning flange has an outer end positioning reference surface corresponding to the side surface of each radial outer end facing the reflecting working surface, each radial outer end is attached to and detachably fixed on the outer end positioning reference surface.

[0005] In some embodiments, the inner end positioning reference surface is a continuous annular surface arranged around the central axis of the center positioning ring; and / or the inner end positioning reference surface has a plurality of first through holes arranged corresponding to the positions of the reflective petal bodies of each petal, and the center positioning connection structure also includes a threaded connecting stud and a butterfly nut, and each petal of the reflective petal body is fixedly connected to the center positioning ring via the connecting stud and the butterfly nut.

[0006] In some embodiments, connecting plates are provided on both circumferential sides of the radial outer end of each petal of the reflective petal body, each connecting plate protrudes from the outer circle of the reflective petal body along the extension direction of the reflective working surface, and the outer edge positioning connection structure is connected between the connecting plates of each of the two adjacent reflective petals.

[0007] In some embodiments, the outer edge positioning connection structure also includes a connecting block and a nut member that can be threadedly connected to the rivet fastening column. The connecting block is fixedly connected to the connecting plate. A semicircular groove is formed on the circumferential outer end surface of each connecting block. The semicircular grooves respectively provided by two adjacent connecting blocks jointly form a through hole for the rivet fastening column. The positioning flange and the nut member are respectively located at the axial ends of the through hole, and the nut member is located on the side of the through hole away from the reflective working surface.

[0008] In some embodiments, an installation groove is formed on the connecting plate, the connecting block is bonded into the installation groove, the end face of the connecting block close to the reflective working surface is the inner end face, the inner end face is on the extended arc surface of the reflective working surface, and the outer end positioning reference surface is in contact with the inner end face.

[0009] In some embodiments, the connecting plate and the reflective petal body are integrally formed.

[0010] In some embodiments, a protrusion extending toward a side away from the reflective working surface is formed on an end surface of the connecting block away from the reflective working surface, and the circumferential inner side of the protrusion is a guiding slope so that the circumferential width of the protrusion becomes smaller and smaller along its protrusion direction, and the nut member includes a gap adjustment locking block and a locking nut, wherein the gap adjustment locking block has a U-shaped opening, and the protrusions respectively provided by two adjacent connecting blocks can be located in the U-shaped opening, and the nut member is threadedly connected to the rivet fastening column through the locking nut, and the gap adjustment locking block is located between the locking nut and the connecting block.

[0011] In some embodiments, the locking nut has a spherical protrusion on one side end surface facing the gap adjustment locking block, and the gap adjustment locking block has a spherical groove on one side end surface facing the locking nut, the spherical protrusion is spherically matched with the spherical groove, and the protrusion height of the spherical protrusion is greater than the recessed depth of the spherical groove, the gap adjustment locking block is mounted on the rivet fastening column and there is an annular gap between the two.

[0012] The present invention also provides a method for adjusting the profile accuracy of the reflective surface of the split-lobe satellite antenna as described above, comprising the following steps:

[0013] The radial inner end of each reflective petal body is fastened to the inner end positioning reference surface of the central positioning ring;

[0014] Each of the outer edge positioning connection structures is used to form a preliminary positioning of the radial outer ends of each of the two adjacent reflective petals, and the diameter of each rivet fastening column in the outer edge positioning connection structure is larger than the diameter of the semicircular groove by a preset value A;

[0015] Measuring the profile accuracy of the reflective working surface formed by the reflective petal body of each petal after preliminary positioning;

[0016] When the profile accuracy is lower than the target accuracy, each rivet fastening column in the outer edge positioning connection structure is replaced with a rivet fastening column with a smaller diameter, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy;

[0017] When the profile accuracy is higher than the target accuracy, each rivet fastening column in the outer edge positioning connection structure is replaced with a rivet fastening column with a larger diameter, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy.

[0018] The present invention also provides a satellite antenna, comprising the above-mentioned split-lobed satellite antenna reflecting surface.

[0019] The method for adjusting the reflecting surface and profile accuracy of a split-petal satellite antenna and the satellite antenna of the present invention use a central positioning connection structure and an outer edge positioning connection structure to respectively form a reliable connection between the radial inner end and the radial outer end of each reflecting petal body, while also using their own inner end positioning reference surface and outer end positioning reference surface to respectively contact and fit with the reflecting working surface of each reflecting petal body. Objectively, each reflecting petal body uses its reflecting working surface as an installation reference, and can achieve reliable guarantee of the profile accuracy of the transmitting working surface by controlling the shape and position accuracy of each inner end positioning reference surface and outer end positioning reference surface, effectively eliminating the problem in the prior art that the connection positioning reference is on the back or side of the reflecting surface, resulting in a large overall accuracy deviation of the reflecting surface transmitting curve, and cannot meet the profile accuracy requirements of the reflecting surface of interchangeable high-frequency satellite antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the reflective surface of the split-lobed satellite antenna in an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of the state in which the outer edge positioning connection structure positions and connects two adjacent reflection petals (partial);

[0022] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the outer edge positioning connection structure;

[0023] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the connection block in FIG.

[0024] Figure 5 yes Figure 3 A schematic diagram of the three-dimensional structure of the gap adjustment locking block;

[0025] Figure 6 yes Figure 1 Schematic diagram (partial) of the state in which the central positioning connection structure positions and connects the radial inner ends of each reflective petal body.

[0026] In the figure: 1. reflective petal; 11. reflective working surface; 12. connecting plate; 2. center positioning connection structure; 21. center positioning ring; 210. inner end positioning reference surface; 221. connecting stud; 222. butterfly nut; 3. outer edge positioning connection structure; 31. rivet fastening column; 310. outer end positioning reference surface; 311. positioning flange; 32. connecting block; 321. semicircular groove; 322. protrusion; 33. nut piece; 331. clearance adjustment locking block; 3311. spherical groove; 332. locking nut; 3321. spherical protrusion. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. In the figures, the thickness of regions and layers are exaggerated for clarity. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0028] The described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present invention. However, those skilled in the art will appreciate that the technical solution of the present invention may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring various aspects of the present invention.

[0029] The following example describes the embodiment of the split-lobed satellite antenna reflector and profile precision adjustment method and satellite antenna of the present invention. This example is only a part of the embodiments of the present invention, but the protection scope of the present invention is not limited to this. All other embodiments obtained by ordinary technicians in this field without creative work should be included in the protection scope of the present invention.

[0030] Please refer to Figures 1 to 6 According to an embodiment of the present invention, a split-lobe satellite antenna reflector is provided, comprising a multi-lobe reflector body 1, each lobe of the reflector body 1 comprising a reflective working surface 11 and a lobe back surface (not marked in the figure) on the opposite side of the reflective working surface 11, the split-lobe satellite antenna reflector further comprises a center positioning connection structure 2 and an outer edge positioning connection structure 3, each lobe of the reflector body 1 has a radial inner end and a radial outer end, the center positioning connection structure 2 comprises a center positioning ring 21, the center positioning ring 21 has an inner end positioning reference surface 210 (i.e., a side surface of each radial inner end facing the reflective working surface 11) corresponding to the side surface of each radial inner end facing the reflective working surface 11 Figure 1 The bottom surface of the center positioning ring 21 in the orientation shown in the figure), each of the radial inner ends is attached to and detachably fixed on the inner end positioning reference surface 210, and the outer edge positioning connection structure 3 includes a rivet fastening column 31, and the rivet fastening column 31 includes a positioning flange 311, and the positioning flange 311 has an outer end positioning reference surface 310 (that is, a side surface of each radial outer end facing the reflection working surface 11) corresponding to the side surface Figure 1 The bottom surface of the positioning flange 311 in the orientation shown), each of the radial outer ends is adhered to and detachably fixed on the outer end positioning reference surface 310, it can be understood that the radial inner end adhered to the inner end positioning reference surface 210 can objectively be a part of the radial inner area of ​​the aforementioned reflection working surface 11, and the radial outer end adhered to the outer end positioning reference surface 310 can objectively be a part of the radial outer area of ​​the aforementioned reflection working surface 11, and the adhesion refers to that the curvature of the arc surfaces of the two are kept consistent to ensure gapless contact between the two adhered parts, thereby realizing the shape and position control of the contact parts of the two.

[0031] In this technical solution, a central positioning connection structure 2 and an outer edge positioning connection structure 3 are used to respectively form a reliable connection between the radial inner end and the radial outer end of each reflection petal body 1, and the inner end positioning reference surface 210 and the outer end positioning reference surface 310 respectively contact and fit with the reflection working surface 11 of each reflection petal body 1. Objectively, each reflection petal body 1 uses its reflection working surface 11 as the installation reference, and can achieve reliable guarantee of the surface accuracy of the emission working surface by controlling the shape and position accuracy of each inner end positioning reference surface 210 and the outer end positioning reference surface 310, effectively eliminating the problem in the prior art that the connection positioning reference is on the back or side of the reflection surface, resulting in a large deviation in the overall accuracy of the reflection surface emission curve, and cannot meet the requirements of the reflective surface accuracy of the interchangeable high-frequency satellite antenna.

[0032] In some embodiments, the inner end positioning reference surface 210 is a continuous annular surface arranged around the central axis of the center positioning ring 21, which can facilitate the reference surface processing of the center positioning ring 21, for example, by a one-time milling forming method, thereby reducing processing costs and improving the positioning accuracy of the radial inner end. The top surface of the aforementioned center positioning ring 21 can be connected to the feed source.

[0033] The inner end positioning reference surface 210 has a plurality of first through holes (not marked in the figure) which are respectively arranged corresponding to the positions of the reflective petal bodies 1 of each petal. The center positioning connection structure 2 also includes a threaded connecting stud 221 and a butterfly nut 222. The butterfly nut 222 can improve the convenience of disassembly and assembly of components. The reflective petal bodies 1 of each petal are fixedly connected to the center positioning ring 21 via the connecting stud 221 and the butterfly nut 222.

[0034] In some embodiments, connecting plates 12 are provided on both circumferential sides of the radial outer end of each petal of the reflective petal body 1, and each of the connecting plates 12 protrudes from the outer circle of the reflective petal body 1 along the extension direction of the reflective working surface 11, and the outer edge positioning connection structure 3 is connected between the connecting plates 12 respectively provided by two adjacent reflective petal bodies 1, that is, a corresponding connecting plate 12 is provided in an extension area outside the area of ​​the reflective working surface 11 of each reflective petal body 1, and the outer edge positioning connection structure 3 is provided on the connecting plate 12, which can effectively reduce the adverse obstruction of the reflected signal caused by the outer edge positioning connection structure 3 being provided in the area of ​​the reflective working surface 11. In a preferred embodiment, the connecting plate 12 is integrally formed with the reflective petal body 1, that is, objectively, the connecting plate 12 is a part of the reflective petal body 1, so that the position consistency between the connecting plate 12 and the reflective working surface 11 can be ensured, thereby ensuring the reliability of the positioning reference and the accuracy of the profile precision adjustment.

[0035] See also Figure 2 and Figure 3As shown, in some embodiments, the outer edge positioning connection structure 3 also includes a connecting block 32 and a nut member 33 that can be threadedly connected to the rivet fastening column 31, the connecting block 32 is fixedly connected to the connecting plate 12, and a semicircular groove 321 is formed on the circumferential outer end surface of each connecting block 32, and the semicircular grooves 321 respectively provided by two adjacent connecting blocks 32 jointly form a through hole for the rivet fastening column 31 (not marked in the figure), the positioning flange 311 and the nut member 33 are respectively located at the axial ends of the through hole, and the nut member 33 is located on the side of the through hole away from the reflective working surface 11.

[0036] In this technical solution, the connecting block 32 is fixed on the connecting plate 12 of each reflective petal body 1, and the rivet fastening column 31 passes through the semicircular groove 321 of two adjacent matching connecting blocks 32. In this way, the size of the joint between two adjacent reflective petal bodies 1 can be adjusted by increasing the diameter of the rivet fastening column 31, thereby being able to adjust the surface accuracy of the reflective working surface 11 after assembly.

[0037] In some embodiments, a mounting groove (not marked in the figure) is formed on the connecting plate 12, and the connecting block 32 is bonded (bonded by glue with performance standards) in the mounting groove, and the end surface of the connecting block 32 close to the reflective working surface 11 is the inner end surface (that is, Figure 2 The top surface in the orientation shown), the inner end surface is on the extended arc surface of the reflective working surface 11, so that the inner end surface of the connecting block 32 is objectively consistent with the surface accuracy of the reflective working surface 11, that is, the transfer of the installation positioning reference is realized, and the outer end positioning reference surface 310 is in contact with the inner end surface.

[0038] In this technical solution, the connection block 32 and the connection plate 12 are bonded to each other, so that the two can be more flexible in terms of structural composition and material selection, so that the connection block 32 can be made of a material with higher structural strength, so as to resist the damage caused by the tensile pressure during positioning, and each reflective petal body 1 can choose a carbon fiber composite material and a honeycomb sandwich structure based on the requirements of portability and small mass. Specifically, the carbon fiber composite material is used as the surface support layer, and the honeycomb material is used as the sandwich layer (i.e., the sandwich). The polymer glue is bonded at high temperature.

[0039] In some embodiments, a protrusion 322 extending toward the side away from the reflective working surface 11 is formed on the end surface of the connecting block 32 on one side away from the reflective working surface 11, and the circumferential inner side of the protrusion 322 is a guiding slope so that the circumferential width of the protrusion 322 becomes smaller and smaller along its protruding direction. When two adjacent connecting blocks 32 are spliced, the two protrusions 322 form a frustum structure with a small outside and a large inside. The nut member 33 includes a gap adjustment locking block 331 and a locking nut 332, wherein the gap adjustment locking block 331 has a U-shaped opening, and the protrusions 322 respectively provided by two adjacent connecting blocks 32 can be located in the U-shaped opening, and the nut member 33 is threadedly connected to the rivet fastening column 31 through the locking nut 332, and the gap adjustment locking block 331 is located between the locking nut 332 and the connecting block 32.

[0040] In this technical solution, the circumferential connection of the two adjacent reflective petals 1 is achieved through the cooperation between the protrusions 322 respectively provided by the two adjacent connecting blocks 32 and the U-shaped opening of the gap adjustment locking block 331. At the same time, axial locking and positioning are achieved through the threaded connection between the locking nut 332 and the rivet fastening column 31. At the same time, the cooperation and guidance between the U-shaped opening and the guiding bevel can realize the adjustment of the circumferential spacing between the two adjacent reflective petals 1, thereby achieving the purpose of adjusting the surface accuracy of the reflective working surface 11.

[0041] See also Figures 2 to 5 As shown, in some embodiments, the locking nut 332 has a spherical protrusion 3321 on one side end surface facing the gap adjustment locking block 331, and the gap adjustment locking block 331 has a spherical groove 3311 on one side end surface facing the locking nut 332, the spherical protrusion 3321 is spherically matched with the spherical groove 3311, and the protrusion height of the spherical protrusion 3321 is greater than the recessed depth of the spherical groove 3311, the gap adjustment locking block 331 is mounted on the rivet fastening column 31 and there is an annular gap between the two, and the aforementioned spherical protrusion 3321 is objectively a semi-sphere.

[0042] In this technical solution, when there are shape and position differences (for example, non-parallel) between the protrusions 322 of two adjacent connecting blocks 32, the aforementioned annular gap can allow a certain degree of adjustment space for the position of the gap adjustment locking block 331, so that under the cooperation of the aforementioned spherical protrusion 3321 and the spherical groove 3311, the locking nut 332 can achieve balanced tightening of the gap adjustment locking block 331.

[0043] According to an embodiment of the present invention, there is also provided a method for adjusting the profile accuracy of the reflective surface of the split-lobe satellite antenna as described above, comprising the following steps:

[0044] The radial inner end of each reflective petal body 1 is fastened to the inner end positioning reference surface 210 of the central positioning ring 21, so that the radial inner end of each reflective petal body 1 is accurately positioned, and each reflective petal body 1 forms an integral emitting working surface with a spherical profile;

[0045] Each outer edge positioning connection structure 3 is used to form a preliminary positioning for the radial outer ends of each adjacent two petals of the reflective petal body 1, and the diameter of each rivet fastening column 31 in the outer edge positioning connection structure 3 is larger than the diameter of the semicircular groove 321 by a preset value A. The preset value A can be obtained according to the adjustment before leaving the factory;

[0046] The surface accuracy of the reflection working surface 11 formed by the reflection petal body 1 of each petal after preliminary positioning is measured. If the surface accuracy at this time is consistent with the target accuracy, no subsequent operation is required;

[0047] When the profile accuracy is lower than the target accuracy, each rivet fastening column 31 in the outer edge positioning connection structure 3 is replaced by a rivet fastening column 31 with a smaller diameter, so that the distance between the two adjacent reflection petals 1 becomes smaller, so that the spherical horn formed by the reflection working surface 11 shrinks inward, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy; when the profile accuracy is higher than the target accuracy, each rivet fastening column 31 in the outer edge positioning connection structure 3 is replaced by a rivet fastening column 31 with a larger diameter, so that the distance between the two adjacent reflection petals 1 becomes larger, so that the spherical horn formed by the reflection working surface 11 expands outward, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy. This ensures that when the satellite antenna reflection surface is damaged and needs to be replaced during actual application, the profile accuracy can be adjusted very conveniently. Of course, this adjustment process is also applicable to the equipment before leaving the factory. The aforementioned profile accuracy specifically refers to whether the profile line of the assembled satellite antenna reflector is in an ideal state. When the assembled profile line is below the profile line corresponding to the ideal state, it means that the profile horn mouth is too large to expand outward and needs to be closed. On the contrary, when the assembled profile line is above the profile line corresponding to the ideal state, it means that the profile horn mouth is too large to shrink inward and needs to be expanded. The aforementioned above profile line refers to the side of the profile line corresponding to the ideal state close to the feed source of the satellite antenna, and below profile line refers to the side of the profile line corresponding to the ideal state away from the feed source of the satellite antenna. It should be particularly emphasized that since the profile accuracy can be precisely adjusted by the outer edge positioning connection structure in the present invention, each reflection petal body 1 of the satellite antenna reflector surface of the present invention has a very high interchangeability, thereby improving the versatility of the equipment.

[0048] According to an embodiment of the present invention, there is also provided a satellite antenna, comprising the above-mentioned split-lobe satellite antenna reflecting surface.

[0049] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A split-lobed satellite antenna reflector, characterized in that: The invention comprises a multi-petal reflective flap body (1), each petal of the reflective flap body (1) comprises a reflective working surface (11) and a flap body back surface located on the opposite side of the reflective working surface (11), and further comprises a center positioning connection structure (2) and an outer edge positioning connection structure (3), each petal of the reflective flap body (1) has a radial inner end and a radial outer end, the center positioning connection structure (2) comprises a center positioning ring (21), and the center positioning ring (21) has an inner side corresponding to the side surface of each radial inner end facing the reflective working surface (11). An end positioning reference surface (210), each of the radial inner ends is attached to and detachably fixed on the inner end positioning reference surface (210), the outer edge positioning connection structure (3) includes a rivet fastening column (31), the rivet fastening column (31) includes a positioning flange (311), the positioning flange (311) has an outer end positioning reference surface (310) corresponding to the side surface of each radial outer end facing the reflective working surface (11), and each of the radial outer ends is attached to and detachably fixed on the outer end positioning reference surface (310).

2. The reflective surface of the split-lobed satellite antenna according to claim 1, characterized in that: The inner end positioning reference surface (210) is a continuous annular surface arranged around the central axis of the center positioning ring (21); and / or, the inner end positioning reference surface (210) has a plurality of first through holes arranged corresponding to the positions of the reflection petal bodies (1) of each petal, and the center positioning connection structure (2) also includes a threaded connection stud (221) and a butterfly nut (222), and each petal of the reflection petal body (1) is fixedly connected to the center positioning ring (21) via the connection stud (221) and the butterfly nut (222).

3. The reflective surface of the split-lobed satellite antenna according to claim 1, characterized in that: Connecting plates (12) are provided on both circumferential sides of the radial outer end of each petal of the reflective petal body (1), and each connecting plate (12) protrudes from the outer circle of the reflective petal body (1) along the extension direction of the reflective working surface (11), and the outer edge positioning connection structure (3) is connected between the connecting plates (12) respectively provided by two adjacent reflective petal bodies (1).

4. The reflective surface of the split-lobed satellite antenna according to claim 3, characterized in that: The outer edge positioning connection structure (3) also includes a connection block (32) and a nut member (33) capable of being threadedly connected to the rivet fastening column (31); the connection block (32) is fixedly connected to the connection plate (12); a semicircular groove (321) is formed on the circumferential outer end surface of each connection block (32); the semicircular grooves (321) respectively provided on two adjacent connection blocks (32) together form a through hole for the rivet fastening column (31); the positioning flange (311) and the nut member (33) are respectively located at the axial ends of the through hole, and the nut member (33) is located on the side of the through hole away from the reflective working surface (11).

5. The reflective surface of the split-lobed satellite antenna according to claim 4, characterized in that: The connecting plate (12) is formed with a mounting groove, the connecting block (32) is bonded into the mounting groove, the end face of the connecting block (32) close to the reflective working surface (11) is an inner end face, the inner end face is located on an extended arc surface of the reflective working surface (11), and the outer end positioning reference surface (310) is in contact with the inner end face.

6. The reflective surface of the split-lobed satellite antenna according to claim 5, characterized in that: The connecting plate (12) and the reflective petal body (1) are integrally formed.

7. The reflective surface of the split-lobed satellite antenna according to claim 5, characterized in that: A protrusion (322) extending toward the side away from the reflective working surface (11) is formed on the end surface of the connecting block (32) on one side away from the reflective working surface (11); the circumferential inner side of the protrusion (322) is a guiding inclined surface so that the circumferential width of the protrusion (322) becomes smaller and smaller along its protruding direction; the nut member (33) comprises a gap adjustment locking block (331) and a locking nut (332); wherein the gap adjustment locking block (331) has a U-shaped opening; the protrusions (322) respectively provided by two adjacent connecting blocks (32) can be located in the U-shaped opening; the nut member (33) is threadedly connected to the rivet fastening column (31) through the locking nut (332); and the gap adjustment locking block (331) is located between the locking nut (332) and the connecting block (32).

8. The reflective surface of the split-lobed satellite antenna according to claim 7, characterized in that: The locking nut (332) has a spherical protrusion (3321) on one end surface facing the gap adjustment locking block (331), and the gap adjustment locking block (331) has a spherical groove (3311) on one end surface facing the locking nut (332). The spherical protrusion (3321) is spherically matched with the spherical groove (3311), and the protrusion height of the spherical protrusion (3321) is greater than the recessed depth of the spherical groove (3311). The gap adjustment locking block (331) is fitted with the rivet fastening column (31) and an annular gap is provided between the two.

9. A method for adjusting the profile accuracy of a reflective surface of a split-lobe satellite antenna as claimed in claim 8, characterized in that: The steps include: The radial inner end of each petal of the reflective petal body (1) is fastened to the inner end positioning reference surface (210) of the central positioning ring (21); Each of the outer edge positioning connection structures (3) is used to form preliminary positioning for the radial outer ends of each of the two adjacent reflective petal bodies (1), and the diameter of each rivet fastening column (31) in the outer edge positioning connection structure (3) is larger than the diameter of the semicircular groove (321) by a preset value A; Measuring the profile accuracy of the reflection working surface (11) formed by the reflection petal body (1) of each petal after preliminary positioning; When the profile accuracy is lower than the target accuracy, each rivet fastening column (31) in the outer edge positioning connection structure (3) is replaced with a rivet fastening column (31) with a smaller diameter, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy; When the profile accuracy is higher than the target accuracy, each rivet fastening column (31) in the outer edge positioning connection structure (3) is replaced with a rivet fastening column (31) with a larger diameter, and the profile accuracy is measured again until the profile accuracy reaches the target accuracy.

10. A satellite antenna, characterized in that: The invention comprises the split-lobe satellite antenna reflecting surface as claimed in any one of claims 1 to 8.

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