An umbrella antenna reflector

Abstract

The invention provides an umbrella-shaped antenna reflector, which includes a base, a fixed surface part, an expandable part, a mesh surface part, and a drive assembly; wherein, the fixed surface is a fixed surface reflector, and the expandable part includes a plurality of expansion ribs, The mesh part includes a front tension net and a rear tension net, and the drive assembly includes a motor and a power rope; the fixed surface part is fixedly connected to the base, and the expandable part is hingedly connected to the base. The deployment of the umbrella-shaped antenna reflector is successfully realized. The umbrella-shaped antenna reflector of the present invention is a large-caliber, high-precision umbrella-shaped antenna reflector, which has the advantages of high profile precision, strong profile retention capability, high stability, high rigidity of the unfolded ribs, and high reflection efficiency, and can be used in space middle.

Description

technical field [0001] The invention relates to an antenna reflector, in particular to a large-caliber high-precision umbrella-shaped antenna reflector applied in space. Background technique [0002] Umbrella-shaped antenna reflectors used in space are similar in structure to umbrellas, mainly composed of spreading ribs and metal reflective nets. The expansion ribs are connected to the base of the umbrella-shaped antenna reflector through hinges, and the metal reflection net is laid on the expansion ribs. The antenna reflector is first folded into a column shape. After the antenna reflector reaches the predetermined position in space, the expansion ribs are driven by the expansion mechanism at the bottom of the antenna reflector to expand. After the antenna reflector is deployed in place, it is like a stretched umbrella. [0003] Among the existing umbrella antenna reflectors, according to the mesh structure and deployment method, they can be mainly divided into: single-la...

AI Technical Summary

Problems solved by technology

[0005] 1. The umbrella-shaped antenna reflector cannot be unfolded smoothly at all. Even if the reflector can be barely unfolded, the surface accuracy of the antenna reflector after unfolding is difficult to meet the requirements

[0006] 2. When the diameter of the antenna reflector is further increased, the deployment power required by the antenna reflector is further increased, which makes the deployment mechanism become extremely large, and the weight of the antenna reflector increases sharply. At the same time, the effective reflection area of ​​the antenna reflector increases. Large losses, seriously affecting the performance of the antenna reflector

[0007] 3. In the harsh high and low temperature environment in space, the profile of the antenna reflector is prone to change, the stability of the profile system is not high, and it does not have high profile accuracy and profile retention ability

[0008] 4. The expansion rib has a large weight and low rigidity, especially the root of the expansion rib is prone to deformation, which will affect the stability of the antenna reflector and affect the performance of the antenna reflector

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