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Mesh surface of spaceborne mesh antenna

A mesh and antenna technology, applied in antennas, antenna parts, antenna supports/mounting devices, etc., can solve the problems of not being able to meet the design requirements of high-precision mesh antennas, affecting the accuracy of antenna reflective surfaces, etc., to achieve small The effect of assembly clearance and high assembly accuracy

Active Publication Date: 2018-09-14
XIAN INSTITUE OF SPACE RADIO TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

For mesh antennas with relatively low surface accuracy requirements, the number of segments of the mesh surface is generally relatively small, and the error accumulation caused by the length of each rope and splicing can be ignored; but for high-precision mesh antennas, the segmentation of the mesh surface If the number is relatively large, the error of the length of the rope and splicing will seriously affect the surface accuracy of the entire antenna reflective surface. Therefore, the current mesh surface design method cannot meet the design requirements of high-precision mesh antennas.

Method used

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  • Mesh surface of spaceborne mesh antenna
  • Mesh surface of spaceborne mesh antenna
  • Mesh surface of spaceborne mesh antenna

Examples

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Embodiment

[0024] Take the mesh design of an elliptical loop antenna with a long axis of 7000mm and a short axis of 6000mm as an example. The mesh is a standard parabolic surface with a focal length of 3328mm and an offset of 4000mm. The number of segments on each side of the mesh is 16.

[0025] The present invention adopts the carbon fiber rope strap of rectangular section to replace the rope. Carbon fiber bundles are coated with polyimide to form high-rigidity carbon fiber tapes by hot-melt method. Through the optimized design of the size of the carbon fiber cable, the thickness of the carbon fiber cable is 0.25mm, and the width of the cable is 7mm.

[0026] Since the carbon fiber cable has a relatively high rigidity and a width of 7 mm, a row of unequal through-holes can be processed on the surface of the cable by CNC machining, and the diameter of the through-hole is generally related to the width of the cable. The diameter of the through hole in this example is 3 mm. The specific...

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Abstract

The invention discloses a mesh surface of a spaceborne mesh antenna, and the mesh surface employs a rectangular-section rope belt for replacing a circular-section rope, and is used for the mesh surface design of a large-scale high-precision mesh antenna. In order to reduce the errors, caused by the processing and assembly, of a segmented rope, the whole rope belt is used for replacing the segmented rope, and a screw assembly mode is employed for splicing the rope belts to form the whole mesh surface. According to a proposed mesh surface design method, the method can achieve the mesh surface ofa spaceborne high-precision mesh antenna, so as to meet the domestic demands for the large-aperture high-precision mesh antennas.

Description

technical field [0001] The invention belongs to the technical field of large-scale mesh antennas, and in particular relates to a mesh surface of a space-borne mesh antenna, which provides a solution for realizing a large-scale high-precision mesh antenna. Background technique [0002] With the rapid development of my country's satellite payload technology, the demand for large-scale high-precision loop antennas with an aperture of more than 5 meters is increasingly obvious. The loop antenna reflector is composed of five parts: a ring-shaped expandable truss 1, a front tension net 2, a metal net 3, a rear tension net 4, and a tension array 5, such as figure 1 shown. As the reflective surface of the antenna, the metal mesh 3 has strict surface accuracy requirements, while the front tension mesh 2 and the tension array 5 provide support for maintaining the shape of the metal mesh 3 . [0003] Since the metal mesh is attached to the front tension net, the profile accuracy of t...

Claims

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Application Information

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IPC IPC(8): H01Q1/14H01Q1/24H01Q1/36
CPCH01Q1/14H01Q1/243H01Q1/36
Inventor 张欣马小飞郑士昆段玉柱王勇王磊孙蛟龙张天锐陈卓
Owner XIAN INSTITUE OF SPACE RADIO TECH
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