Adjustable fixture for satellite antenna subreflector and method of operation

Abstract

An adjustable fixing device and operating method for a satellite antenna sub-reflector, comprising a main reflector, a sub-reflector and a feed waveguide, the main reflector is provided with a connecting structure for connecting the sub-reflector, and the feed waveguide is arranged in the connecting structure; the top of the connecting structure is provided with an adjusting mechanism for supporting the sub-reflector and adjusting the coaxiality of the sub-reflector and the feed waveguide, the adjusting mechanism comprises a mounting seat and a plurality of supporting frames connected to the mounting seat, and the supporting frames are provided with supporting rings for mounting the sub-reflector; compared with the prior art, the coaxiality adjustment and the levelness and height adjustment are completely decoupled in the mechanical structure and the operation process through the unique structural design, the operator can independently carry out fine adjustment, and the adjustment logic is greatly simplified, the dependence on the experience of the operator is reduced, and the adjustment process is more intuitive and accurate.

Description

Technical Field

[0001] This invention relates to the field of satellite communication antenna technology, specifically to an adjustable fixing device and operating method for a satellite antenna sub-reflector. Background Technology

[0002] Satellite communication QV band refers to high-frequency resources in the millimeter-wave band, typically covering the Q band (33-50 GHz) and V band (50-75 GHz). This band, with its large bandwidth, high capacity, and narrow beam characteristics, has become a core technology direction for next-generation satellite communication systems, showing great potential, especially in high-throughput satellites (HTS), low-Earth orbit satellite constellations, and military communications.

[0003] Satellite communication technology is evolving towards higher frequency bands such as the QV band (33-75 GHz) to achieve greater bandwidth and higher transmission rates. However, increasing the frequency means a sharp narrowing of the beamwidth (for example, a 1.8-meter antenna has a beamwidth of only about 0.33° at 40.5 GHz), which places extremely stringent requirements on the manufacturing and assembly precision of the antenna. As one of the core components of a Cassegrain or feedforward antenna system, even a small deviation in the relative position (including coaxiality and relative height) between the subreflector and the feed waveguide can lead to a significant decrease in signal gain, severely impacting communication quality.

[0004] Currently, the assembly and debugging of high-precision satellite antenna subreflectors heavily relies on high-precision 3D scanners for measurement. Operators need to perform multiple 3D scans of the components, compare the point cloud data with the theoretical model, and then repeatedly adjust and verify based on deviations. This method has many drawbacks: First, the 3D scanning equipment itself is expensive, increasing production costs; second, the process requires extremely high professional skills from operators, and the measurement results are easily affected by factors such as ambient light and vibration; finally, the scan-compare-adjust cycle is time-consuming, cannot achieve real-time adjustments, is inefficient, and cannot meet the needs of large-scale production.

[0005] Chinese Patent Application No. 201720819384.9 discloses a multi-dimensional adjustment device for an antenna sub-surface. The disclosed adjustment device has an upwardly radiating sub-surface support rod installed at the bottom of the feed source. The sub-surface is mounted on the top of the support rod via a sub-surface bracket. The sub-surface bracket is flat and located above the sub-surface. Several ball joints are provided between the sub-surface and the sub-surface bracket. There are three ball joints between the sub-surface and the sub-surface bracket: ball joint number one, ball joint number two, and ball joint number three. Ball joint number one corresponds to the center of the sub-surface. The line connecting ball joint number one and ball joint number two is the X-axis, and the line connecting ball joint number one and ball joint number three is the Y-axis. Chinese Patent Application No. 202020525117.2 discloses a satellite communication antenna with a carbon fiber structure sub-reflector support. The disclosed satellite communication antenna includes a main reflector and a sub-reflector. The bottom of the main reflector is mounted on a bracket and is rotatable. It has a receiving and transmitting device at its center. The sub-reflector is suspended above the main reflector. It also includes a support rod, a connecting seat, an adjusting rod, an arc-shaped seat plate, and a plug-in plate. The support rod is made of carbon fiber and consists of four rods, which are evenly distributed around the center of the main reflector. The bottom of the arc-shaped seat plate is plugged into the arc-shaped seat plate. The bottom radius of the arc-shaped seat plate is the same as that of the main reflector and is locked onto the main reflector. The support rod extends obliquely upward, and a strip-shaped plug-in plate is installed at the other end. The plug-in plate extends into the connecting seat and is locked by a bolt and nut assembly. The upper part of the support rod suspends the sub-reflector through the adjusting rod. The distance between the sub-reflector and the main reflector is adjustable.

[0006] The aforementioned prior art uses the advancing and retracting action of three ball-head screws to adjust the sub-reflector's Z-axis displacement and rotation around the X and Y axes. However, this adjustment motion exhibits a certain degree of coupling; adjusting one dimension may slightly affect other dimensions. Furthermore, the core of the existing technology remains focused on innovation in the adjustment mechanism itself, without addressing the reliance on high-cost measuring equipment during the adjustment process. After adjustment using this device, expensive equipment such as a 3D scanner is still required to verify whether the adjustment results meet the standards, failing to fundamentally reduce the cost and technical barriers to debugging. Summary of the Invention

[0007] The present invention aims to overcome the defects in the prior art and provide an adjustable fixing device and operating method for satellite antenna sub-reflector that can be adjusted with high precision using conventional measuring tools.

[0008] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: an adjustable fixing device for a satellite antenna sub-reflector, comprising a main reflector, a sub-reflector, and a feed waveguide. The main reflector has a connecting structure for connecting the sub-reflector, and the feed waveguide is disposed in the connecting structure. The top of the connecting structure has an adjustment mechanism for supporting the sub-reflector and adjusting the coaxiality between the sub-reflector and the feed waveguide. The adjustment mechanism includes a mounting base and several support frames connected to the mounting base. The support frames have a support ring for mounting the sub-reflector, and the support frames have several adjustment components for adjusting the position of the support ring to adjust the horizontal position of the sub-reflector. The support ring has an adjustment component for adjusting the horizontality and height of the sub-reflector.

[0009] As a preferred embodiment of the present invention, the connection structure includes a support tube and a base disposed at the bottom end of the support tube, the base being disposed on the main reflecting surface, and the feed waveguide being fixedly disposed on the base.

[0010] As a preferred embodiment of the present invention, the mounting base has a through hole in the middle, the mounting base is connected to the top of the support tube, the feed waveguide passes through the through hole, and several support frames are arranged on the mounting base along the circumferential direction of the mounting base.

[0011] As a preferred embodiment of the present invention, the top of the support frame is provided with a support part, the upper surface of the support part is horizontally arranged, the support ring rests on the upper surface of the support part, and the adjusting member is rotatably connected to the support part.

[0012] As a preferred embodiment of the present invention, a plurality of the adjusting components correspond one-to-one with a plurality of support frames. The bottom of the adjusting component is provided with an eccentrically arranged rotating shaft. The rotating shaft is provided with a connecting hole that passes through the adjusting component. The connecting hole is provided with a rotatable bolt, and the bolt is threadedly connected to the support portion.

[0013] As a preferred embodiment of the present invention, the support ring is provided with a plurality of adjustment grooves distributed along its circumferential direction, the plurality of adjustment grooves are disposed on the outer wall of the support ring, and the plurality of adjustment grooves correspond one-to-one with a plurality of adjustment components.

[0014] As a preferred embodiment of the present invention, the adjusting groove has an arc-shaped structure with an arc-shaped step at its bottom, and the adjusting member is located above the step.

[0015] In a preferred embodiment of the present invention, the sub-reflective surface is disposed below the support ring, and the sub-reflective surface is provided with a plurality of mounting portions arranged along its circumferential direction. The mounting portions are provided with positioning rods, and the support ring is provided with guide posts on its lower side, with the positioning rods passing through the guide posts.

[0016] In a preferred embodiment of the present invention, the adjusting component includes a screw rod disposed on the support ring for connecting the mounting part, and a locking nut connected to the screw rod, the locking nut being located on the upper and lower sides of the support ring.

[0017] A method for operating an adjustable fixing device for a satellite antenna sub-reflector includes the following steps:

[0018] S1. Coaxiality adjustment;

[0019] S1.1 Adjust the dial indicator to a suitable position so that the dial indicator's pin contacts the outer measuring circle of the sub-reflector surface, and use the dial indicator to measure the radial runout of the outer circle of the sub-reflector surface.

[0020] S1.2 Rotate the secondary reflector, read the dial indicator value, determine the coaxial deviation of the secondary reflector relative to the mounting base, rotate the adjusting component until the dial indicator pointer fluctuation is within the allowable range, lock the adjusting component, and complete the coaxiality test and adjustment of the secondary reflector.

[0021] S2, Relative height adjustment;

[0022] S2.1 Use a height gauge to measure the actual height of the first height measurement point, and use it as the zero point for measurement;

[0023] S2.2 Move the height gauge vernier to the second height measurement point, adjust the height of the feed waveguide to the theoretical relative height value, lock and fix it to complete the height adjustment of the feed waveguide;

[0024] S2.3 Continue to move the height gauge vernier to the third height measurement point, place the height gauge measuring surface on the relative height measuring plane of the sub-reflector, adjust the sub-reflector to make it horizontal, and then adjust the height of the sub-reflector around the circumference according to the theoretical relative height value so that it is always at the theoretical height, thus completing the height adjustment of the sub-reflector.

[0025] S3. Install the connection structure on the main reflector surface.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The sub-reflector is mounted on the main reflector through a connecting structure, and the feed waveguide is set in the connecting structure. The adjustment component adjusts the horizontal position of the sub-reflector, and then the coaxiality of the sub-reflector and the feed waveguide is adjusted through the adjustment mechanism. The horizontality of the sub-reflector is adjusted through the horizontal adjustment component. Through the unique structural design, the coaxiality adjustment and the horizontality and height adjustment are completely decoupled in terms of mechanical structure and operation process. The operator can make fine adjustments independently without interference, which greatly simplifies the adjustment logic, reduces the dependence on the operator's experience, and makes the adjustment process more intuitive and precise.

[0028] 2. The device design of this invention is optimized for the use of conventional measuring tools. For example, the measuring outer circle and relative height measuring plane on the sub-reflective surface provide a perfect measurement reference for dial indicators and height gauges. With the method of this invention, no expensive and complex professional scanning equipment is required. All adjustments and verification work can be completed with only conventional measuring tools, which greatly reduces the equipment procurement cost and the technical threshold for operators, making it easy to promote in the production line.

[0029] 3. The eccentric rotating shaft design at the bottom of the adjustment component provides an amplified fine-tuning effect, allowing the operator to perform micron-level precise translation to correct coaxiality. After adjustment, the horizontal position and vertical height can be firmly locked by bolts and locking nuts set at the top and bottom, forming a highly rigid overall structure. This mechanical self-locking method can effectively resist the influence of factors such as vibration and thermal deformation, ensuring that the ultra-high precision after adjustment can be maintained for a long time, thus guaranteeing the long-term stability and reliability of antenna performance. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the adjustment mechanism of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the adjusting groove of the present invention;

[0033] Figure 4 This is a schematic diagram of the feed waveguide installation structure;

[0034] Figure 5 This is a structural schematic diagram of the adjusting component;

[0035] Figure 6 This is a schematic diagram of the coaxiality testing structure;

[0036] Figure 7 This is a schematic diagram of the structure for relative height detection.

[0037] Reference numerals: 1. Main reflector; 2. Sub-reflector; 201. Mounting part; 2011. Positioning rod; 3. Feed waveguide; 4. Connecting structure; 401. Support tube; 402. Base; 5. Adjustment mechanism; 501. Support frame; 5011. Support part; 502. Support ring; 5021. Adjustment groove; 5022. Step; 5023. Guide column; 503. Adjustment component; 5031. Rotating shaft; 5032. Connecting hole; 5033. Bolt; 5033. Adjustment assembly; 504. Screw; 5041. Locking nut; 5042. Mounting seat; 505. Through hole; 5051. Rotating base; 6. Dial indicator; 7. Height gauge; 8. Cast iron plate; 9. First height measuring point A; Second height measuring point B; Third height measuring point C. Detailed Implementation

[0038] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0039] like Figures 1-7 As shown, an adjustable fixing device for a satellite antenna sub-reflector includes a main reflector 1, a sub-reflector 2, and a feed waveguide 3. The main reflector 1 has a connecting structure 4 for connecting the sub-reflector 2, and the feed waveguide 3 is disposed in the connecting structure 4. The top of the connecting structure 4 has an adjustment mechanism 5 for supporting the sub-reflector 2 and adjusting the coaxiality of the sub-reflector 2 and the feed waveguide 3. The adjustment mechanism 5 includes a mounting base 505 and a plurality of support frames 501 connected to the mounting base 505. The support frame 501 has a support ring 502 for mounting the sub-reflector 2. The support frame 501 has a plurality of adjustment components 503 for adjusting the position of the support ring 502 to adjust the horizontal position of the sub-reflector 2. The support ring 502 has an adjustment component 504 for adjusting the horizontality and height of the sub-reflector 2.

[0040] Furthermore, the main reflector 1 is positioned below the sub-reflector 2, and the main reflector 1 and sub-reflector 2 are connected and fixed by the connecting structure 4. The feed waveguide 3 is positioned between the main reflector 1 and the sub-reflector 2, and is also positioned within the connecting structure 4. The adjustment mechanism 5 is fixedly connected to the top of the connecting structure 4, and the sub-reflector 2 is positioned on the adjustment mechanism 5. The coaxiality of the sub-reflector 2 and the feed waveguide 3 is adjusted by the adjustment mechanism 5. At the same time, the horizontality and height of the sub-reflector 2 can also be adjusted by the adjustment component 504. Through the unique structural design, the coaxiality adjustment and the horizontality and height adjustment are completely decoupled in terms of mechanical structure and operation process. The operator can make fine adjustments independently without interference, which greatly simplifies the adjustment logic, reduces the dependence on the operator's experience, and makes the adjustment process more intuitive and precise.

[0041] The connection structure 4 includes a support tube 401 and a base 402 disposed at the bottom end of the support tube 401. The base 402 is disposed on the main reflecting surface 1, and the feed waveguide 3 is fixedly disposed on the base 402. Furthermore, the support tube 401 is fixedly disposed on the base 402, and the base 402 is mounted on the main reflecting surface 1. The feed waveguide 3 is located in the support tube 401, and the adjustment mechanism 5 is disposed at the top end of the support tube 401.

[0042] The mounting base 505 has a through hole 5051 in the middle. The mounting base 505 is connected to the top of the support tube 401. The feed waveguide 3 passes through the through hole 5051. Several support frames 501 are arranged on the mounting base 505 along the circumferential direction of the mounting base 505. Furthermore, the mounting base 505 is arranged on the support tube 401. The through hole 5051 is located at the center of the mounting base 505. The feed waveguide 3 passes through the through hole 5051, and the top of the feed waveguide 3 is exposed from the through hole 5051, so that the mounting base 505 and the feed waveguide 3 are concentrically arranged.

[0043] In this embodiment, four support frames 501 are provided. The four support frames 501 are evenly arranged along the circumferential direction of the mounting base 505 at the edge of the mounting base 505. The included angle between two adjacent support frames 501 is ninety degrees. The support ring 502 is connected to the four support frames 501, and the support ring 502 is supported by the four support frames 501.

[0044] The support frame 501 has a support part 5011 at the top. The upper surface of the support part 5011 is horizontally arranged. The support ring 502 rests on the upper surface of the support part 5011. The adjusting member 503 is rotatably connected to the support part 5011. Furthermore, the support part 5011 is a horizontally arranged planar structure. The support ring 502 rests on the support part 5011 and is in a horizontal state. In addition, the adjusting member 503 is connected to the support part 5011. The adjusting member 503 can rotate on the support part 5011. The position of the support ring 502 can be adjusted by adjusting the adjusting member 503.

[0045] Several adjusting components 503 correspond one-to-one with several support frames 501. Each adjusting component 503 has an eccentrically positioned rotating shaft 5031 at its bottom. The rotating shaft 5031 has a through-hole 5032, and the through-hole 5032 has a rotatably connected bolt 5033. The bolt 5033 is threaded onto the support portion 5011. Furthermore, the rotating shaft 5031 is located at the bottom of the adjusting component 503 and is eccentrically positioned. The rotating shaft 5031 also has a coaxially positioned connecting hole 5032. Bolt 5033 is provided in connecting hole 5032 and is rotatably connected to connecting hole 5032. A hole for connecting adjusting member 503 is provided on support part 5011. Bolt 5033 passes through connecting hole 5032 on adjusting member 503 and is threadedly connected to hole in support part 5011. By using bolt 5033, adjusting member 503 can rotate on support part 5011, thereby realizing adjustment of horizontal position of support ring 502. At the same time, tightening bolt 5033 can fix adjusting member 503.

[0046] The support ring 502 is provided with a plurality of adjusting grooves 5021 distributed along its circumference. These adjusting grooves 5021 are located on the outer wall of the support ring 502, and each adjusting groove 5021 corresponds one-to-one with an adjusting member 503. Furthermore, four adjusting grooves 5021 are provided, evenly distributed on the circumference of the support ring 502, and located at the edge of the support ring 502, i.e., on its outer wall. Each of the four adjusting grooves 5021 corresponds one-to-one with an adjusting member 503 on one of the four support frames 501. The adjusting grooves 5021 have an arc-shaped structure, with an arc-shaped step 5022 at their bottom. The adjusting members 503... 03 is located above step 5022. The lower surface of step 5022 abuts against support 5011. The lower surface of adjustment member 503 is located above step 5022, and the height of rotation shaft 5031 is greater than or equal to the height of step 5022. The height of rotation shaft 5031 is also less than the height of adjustment groove 5021 to ensure that adjustment member 503 is always located in adjustment groove 5021. When adjustment member 503 is rotated, support ring 502 is moved in the horizontal direction, thereby realizing the adjustment of the position of support ring 502, so that support ring 502 and mounting base 505 are on the same axis, and thus the sub-reflecting surface 2 and feed waveguide 3 are on the same axis.

[0047] The sub-reflective surface 2 is located below the support ring 502. The sub-reflective surface 2 has several mounting portions 201 arranged along its circumferential direction. Each mounting portion 201 has a positioning rod 2011. A guide post 5023 is located on the lower side of the support ring 502, through which the positioning rod 2011 passes. Furthermore, the sub-reflective surface 2 is fixed by the support ring 502. Specifically, the sub-reflective surface 2 has several mounting portions 201. In this embodiment, four mounting portions 201 are evenly distributed along the circumferential direction of the sub-reflective surface 2. A positioning rod 2011 is provided on each mounting portion 201, and a guide post 5023 is provided on the lower surface of the support ring 502. A guide hole is coaxially arranged in the guide post 5023, through which the positioning rod 2011 passes. This makes positioning the sub-reflective surface 2 more convenient and faster when it is installed on the support ring 502.

[0048] In addition, the height and level of the sub-reflector 2 on the support ring 502 are adjusted by the adjustment component 504. Specifically, the adjustment component 504 includes a screw 5041 disposed on the support ring 502 for connecting to the mounting part 201. A locking nut 5042 is connected to the screw 5041, and the locking nut 5042 is located on the upper and lower sides of the support ring 502. Furthermore, four adjustment components 504 are provided, each corresponding to one mounting part 201. The screw 5041 passes through the support ring 502, and the mounting part 201 is provided with a connection... The screw 5041 is threaded into the hole of the screw rod 5041. Two locking nuts 5042 are provided on the screw rod 5041. The two locking nuts 5042 are located on the upper and lower sides of the support ring 502, respectively. By adjusting the two locking nuts 5042 of the four adjustment components 504, the height of the sub-reflecting surface 2 at each adjustment component 504 can be adjusted, thereby realizing the adjustment of the height and level of the sub-reflecting surface 2. Furthermore, by tightening the two locking nuts 5042 on each adjustment component 504, the height of the sub-reflecting surface 2 at that location can be locked and fixed.

[0049] An operation method for an adjustable fixing device for a satellite antenna sub-reflector is disclosed. The entire adjustment and testing process is carried out in two steps. The first step is to measure and adjust the coaxiality of the sub-reflector 2. The mounting base 505, support frame 501, support ring 502, adjusting component 503, sub-reflector 2, positioning rod 2011, bolt 5033, screw 5041 and locking nut 5042 are assembled into a sub-reflector assembly. Note that the bolt 5033 should not be tightened at this time, and the adjusting component 503 is in a free rotation state.

[0050] Specifically, it includes the following steps:

[0051] S1. Coaxiality adjustment;

[0052] S1.1 Adjust the dial indicator 7 to a suitable position so that the pin of the dial indicator 7 contacts the measuring outer circle of the sub-reflecting surface 2, and use the dial indicator 7 to measure the radial runout of the outer circle of the sub-reflecting surface 2.

[0053] S1.2 Rotate the sub-reflector 2, read the value of dial indicator 7, determine the coaxial deviation of the sub-reflector 2 relative to the mounting base 505, rotate the adjusting component 503 until the fluctuation of the dial indicator 7 pointer is within the allowable range, lock the adjusting component 503, and complete the coaxiality test and adjustment of the sub-reflector 2.

[0054] like Figure 6As shown, prepare a high-precision cast iron plate 9, and fix the rotating base 6 on the cast iron plate. The rotating base 6 and the mounting base 505 are positioned by a deep groove ball bearing to facilitate the free rotation of the sub-reflector assembly around a fixed axis. At the same time, prepare a magnetic dial indicator 7 (including the base) and fix it on the cast iron plate 9. Adjust the position so that the pin of the dial indicator 7 contacts the measuring outer circle (circumferential wall of the sub-reflector 2). Rotate the sub-reflector 2 and read the value of the dial indicator 7 to determine the coaxiality deviation of the sub-reflector 2 relative to the mounting base 505. Rotate the adjusting component 503 until the pointer fluctuation of the dial indicator 7 is within the allowable range, and tighten the locking bolt 5033 to complete the coaxiality test and adjustment of the sub-reflector 2.

[0055] S2, Relative height adjustment;

[0056] S2.1 Use height gauge 8 to measure the actual height of the first height measurement point A, and use it as the measurement zero point;

[0057] S2.2 Move the height gauge 8 vernier to the second height measurement point B, adjust the height of the feed waveguide 3 to the theoretical relative height value, lock and fix it to complete the height adjustment of the feed waveguide 3;

[0058] S2.3 Continue to move the vernier of the height gauge 8 to the third height measurement point C, place the measuring surface of the height gauge 8 on the relative height measuring plane of the sub-reflector 2, adjust the sub-reflector 2 to make it horizontal, and then adjust the height of the sub-reflector 2 around the circumference according to the theoretical relative height value so that it is always at the theoretical height, thus completing the height adjustment of the sub-reflector.

[0059] S3. Install the connecting structure 4 onto the main reflector 1.

[0060] like Figure 7 As shown, the second step is to adjust the relative height between the measuring base 402, the feed waveguide 3 and the sub-reflector 2. Assemble the base 402, the support tube 401, the feed waveguide 3 and the sub-reflector assembly into a feedforward component as required. Note that the locking nuts 5042 in each place should be loosened, and the screw 5041 should be in a free up and down state.

[0061] The feedforward component is fixed to the high-precision cast iron plate 9 with bolts. A high-precision height gauge 8 is also prepared and placed on the cast iron plate 9. Figure 7First, measure the actual height at the first height measurement point A as the zero point. Move the height gauge 8 vernier to the second height measurement point B (i.e., the top of the feed waveguide 3), adjust the height of the feed waveguide 3 to the theoretical relative height value, and lock it in place to complete the height adjustment of the feed waveguide 3. Continue moving the height gauge 8 vernier to the third height measurement point C, placing the measuring surface of the height gauge 8 on the relative height measuring plane of the sub-reflector 2. Because the diameter of the sub-reflector 2 is relatively large, to ensure accurate measurement, first adjust the four locking nuts 5042 to make the sub-reflector 2 horizontal. Then, adjust the locking nuts 5042 one by one according to the theoretical relative height value. After confirming that the height of the sub-reflector 2 is at the theoretical height around its circumference, tighten the locking nuts 5042 to complete the height adjustment of the sub-reflector 2.

[0062] After the above two adjustment steps are completed, the feedforward component is installed on the center hole of the main reflector 1, completing the assembly and adjustment of the entire antenna feed unit. The relative positions of each component meet the design requirements, and the satellite antenna can work normally.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0064] Although this paper frequently uses reference numerals from the figures, such as: main reflector 1, secondary reflector 2, mounting part 201, positioning rod 2011, feed waveguide 3, connecting structure 4, support tube 401, base 402, adjusting mechanism 5, support frame 501, support part 5011, support ring 502, adjusting groove 5021, step 5022, guide column 5023, adjusting component 503, rotating shaft 5031, connecting hole 5032, bolt 5033, adjusting assembly 504, screw 5041, locking nut 5042, mounting base 505, through hole 5051, rotating base 6, dial indicator 7, height gauge 8, cast iron plate 9, first height measuring point A, second height measuring point B, third height measuring point C, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. An adjustable fixing device for a satellite antenna subreflector, comprising a main reflector (1), a subreflector (2) and a feed waveguide (3), characterized in that, The main reflecting surface (1) is provided with a connecting structure (4) for connecting the secondary reflecting surface (2), and the feed waveguide (3) is arranged in the connecting structure (4); the top of the connecting structure (4) is provided with an adjusting mechanism (5) for supporting the secondary reflecting surface (2) and adjusting the coaxiality of the secondary reflecting surface (2) and the feed waveguide (3), the adjusting mechanism (5) comprises a mounting seat (505) and a plurality of supporting frames (501) connected to the mounting seat (505), the supporting frame (501) is provided with a supporting ring (502) for mounting the secondary reflecting surface (2), the supporting frame (501) is provided with a plurality of adjusting members (503) for adjusting the position of the supporting ring (502) to adjust the horizontal position of the secondary reflecting surface (2), and the supporting ring (502) is provided with an adjusting assembly (504) for adjusting the levelness and height of the secondary reflecting surface (2); the operation method of the device comprises the following steps: S1, coaxiality adjustment; S1.1, adjust the position of the dial gauge (7) to make the stylus of the dial gauge (7) contact the measuring outer circle of the secondary reflecting surface (2), and use the dial gauge (7) to measure the radial runout of the outer circle of the secondary reflecting surface (2); S1.2, rotate the secondary reflecting surface (2), read the dial gauge (7) value, judge the coaxiality deviation of the secondary reflecting surface (2) corresponding to the mounting seat (505), rotate the adjusting member (503) until the dial gauge (7) pointer fluctuation is within the allowable range, lock the adjusting member (503), and complete the coaxiality test and adjustment of the secondary reflecting surface (2); S2, relative height adjustment; S2. 1, use the height gauge (8) to measure the actual height of the first height measurement point (A) as the measurement zero; S2. 2, move the cursor of the height gauge (8) to the second height measurement point (B), adjust the height of the feed waveguide (3) to the theoretical relative height value, lock and fix, and complete the height adjustment of the feed waveguide (3); S2. 3, continue to move the cursor of the height gauge (8) to the third height measurement point (C), place the measuring surface of the height gauge (8) on the relative height measurement plane of the secondary reflecting surface (2), adjust the secondary reflecting surface (2) to be in a horizontal position, and then adjust the height of the secondary reflecting surface (2) for one turn according to the theoretical relative height value so that it is at the theoretical height, and the height adjustment of the secondary reflecting surface is completed; S3, install the connecting structure (4) on the main reflecting surface (1).

2. An adjustable fixture for a satellite antenna subreflector according to claim 1, wherein The connecting structure (4) comprises a supporting pipe (401) and a base (402) arranged at the bottom end of the supporting pipe (401), the base (402) is arranged on the main reflecting surface (1), and the feed waveguide (3) is fixedly arranged on the base (402).

3. An adjustable fixture for a satellite antenna subreflector according to claim 2, wherein The middle part of the mounting seat (505) is provided with a through hole (5051), the mounting seat (505) is connected to the top end of the supporting pipe (401), the feed waveguide (3) is arranged in the through hole (5051), and a plurality of supporting frames (501) are arranged on the mounting seat (505) along the circumferential direction of the mounting seat (505).

4. An adjustable fixture for a satellite antenna subreflector according to claim 1, wherein The support frame (501) is provided with a support portion (5011) at the top, the upper surface of the support portion (5011) is horizontally arranged, the support ring (502) is placed on the upper surface of the support portion (5011), and the adjusting member (503) is rotationally connected to the support portion (5011).

5. An adjustable fixture for a satellite antenna subreflector according to claim 4, wherein, The adjusting member (503) is in one-to-one correspondence with the support frame (501), the bottom of the adjusting member (503) is provided with a rotation shaft (5031) arranged eccentrically, the rotation shaft (5031) is provided with a connecting hole (5032) penetrating through the adjusting member (503), the connecting hole (5032) is provided with a rotationally connected bolt (5033), and the bolt (5033) is threadedly connected to the support portion (5011).

6. An adjustable fixture for a satellite antenna subreflector according to claim 1, wherein The support ring (502) is provided with a plurality of adjusting grooves (5021) distributed in the circumferential direction thereof, a plurality of adjusting grooves (5021) are arranged at the outer wall of the support ring (502), and a plurality of adjusting grooves (5021) are in one-to-one correspondence with a plurality of adjusting members (503).

7. An adjustable fixture for a satellite antenna subreflector according to claim 6, wherein The adjusting groove (5021) is of an arc-shaped structure, the bottom of the adjusting groove (5021) is provided with a step (5022) arranged in an arc shape, and the adjusting member (503) is located above the step (5022).

8. An adjustable fixture for a satellite antenna subreflector according to claim 1, wherein, The secondary reflecting surface (2) is arranged below the support ring (502), the secondary reflecting surface (2) is provided with a plurality of mounting portions (201) arranged in the circumferential direction thereof, the mounting portion (201) is provided with a positioning rod (2011), the lower side of the support ring (502) is provided with a guide column (5023), and the positioning rod (2011) is arranged through the guide column (5023).

9. An adjustable fixture for a satellite antenna sub-reflector according to claim 8, wherein, The adjusting assembly (504) comprises a screw rod (5041) arranged on the support ring (502) and used for connecting the mounting portion (201), the screw rod (5041) is connected with a locking nut (5042), and the locking nut (5042) is located on the upper and lower sides of the support ring (502).

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