Satellite-borne deployable mesh antenna

Abstract

The invention discloses a satellite-borne deployable mesh antenna. The satellite-borne deployable mesh antenna comprises an antenna reflecting surface extending arm (1), an antenna reflecting surfacedeployable supporting assembly (2) and a cable net structure (3). The antenna reflecting surface extending arm adopts a carbon fiber composite material hollow round rod design, so that the weight of the extending arm and the in-orbit thermal deformation of the extending arm are reduced, and the antenna pointing accuracy is ensured. The antenna reflecting surface deployable supporting assembly (2)is composed of module units, can be increased or decreased according to the aperture requirement of the antenna reflecting surface, and is high in expandability. The cable net structure is designed ina multi-layer cable net mode, ground adjustment of the profile precision of the reflecting surface is achieved, and the requirement of microwave antenna detection for the profile precision of the reflecting surface is met. According to the invention, factors such as antenna emission folding and in-orbit unfolding, antenna reflecting surface function and performance testing and antenna reflectingsurface profile precision adjusting are comprehensively considered for design, and the requirement of satellite in-orbit ground detection can be met.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a space-borne mesh antenna, in particular to a space-borne large-scale expandable mesh antenna reflective surface and its extension arm. Background technique [0002] With the continuous development of aerospace materials and the improvement of processing and adjustment technology, the design of spaceborne antennas pays more attention to the design requirements of multi-band, high precision and large capacity, and the design of spaceborne antennas tends to be complicated. However, due to the limitations of the rocket's carrying capacity, economy and other factors, the antenna structure is required to be light in weight, small in size, high in rigidity, and strong in expansion capabilities. In order to meet the requirement that the spaceborne large-scale deployable mesh antenna reflective surface needs to ensure the relationship with the feed source position, the relevant parameters need t...

AI Technical Summary

Problems solved by technology

For the solid-surface deployment antenna, the advantages of the traditional solid-surface antenna are retained to a large extent, but due to the problems of large volume and mass and low expansion capability, its effective aperture and on-orbit application are limited; for the inflatable deployment antenna, although it can It satisfies the design requirements of light weight, small size, and strong expansion ability, but there are problems of low antenna profile accuracy and limited thermal stability of the structure; the mesh expansion antenna has poor performance in parameters such as aperture, expansion ability, and antenna profile accuracy. With good performance, it is currently the most widely used spaceborne deployable antenna

[0004] Although the existing mesh-shaped deployable antennas have excellent performance parameters, there are reliability problems due to the complex structure of the antenna reflective surface and various components; poor control problem

[0005] For example, a deployable mesh parabolic cylindrical antenna disclosed in the patent document CN103354303A, although the storage volume of the antenna is relatively small and the surface accuracy is high, but the patent mentions that the parabolic cylindrical antenna cannot meet the on-orbit work of the reflective surface of the spaceborne antenna Requires high antenna pointing accuracy and simple and reliable deployment process

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