Annular deployable mesh antenna with high storage ratio

Abstract

The invention provides an annular deployable mesh antenna with a high storage ratio. The annular deployable mesh antenna comprises an annular truss, a main mesh surface and an auxiliary mesh surface,the annular truss is formed by connecting a plurality of basic quadrilateral units which are distributed along the annular direction and have the same structure; the main net surface and the auxiliarynet surface are symmetrically attached to the upper and lower layers of the annular truss; each basic quadrilateral unit comprises two vertical rods, two transverse rods, two connecting rods, a telescopic inclined sleeve rod, two sliding hinges, two three-joint hinges, two five-joint hinges and two rotating hinges. In each rod piece contained in a certain basic unit in the annular truss, the twoconnecting rods are located in the inner-layer vertical plane, the two vertical rods and the two transverse rods are located in the middle-layer vertical plane, and the inclined sleeve rod is locatedin the outer-layer vertical plane. The annular truss is a single-degree-of-freedom mechanism so as to guarantee the unfolding synchronism, the heights of the annular truss in the folded state and theunfolded state are approximate to the heights of the vertical rods of the annular truss, the annular truss has a high storage ratio, and symmetry of the main net face and the auxiliary net face in theunfolded working state is achieved.

Description

technical field [0001] The invention belongs to the technical field of satellite antennas, and relates to a ring-shaped expandable mesh antenna with a high storage ratio. Background technique [0002] In recent years, with the rapid development of aerospace technologies such as deep space exploration and electromagnetic communication, the required satellite antennas have become larger and larger in diameter. The form of the unfolding mechanism, that is, it can be folded in the rocket fairing in the folded state during launch and transportation, and fully unfolded to the working state to support the antenna mesh after the satellite is in orbit. [0003] Ring truss antenna Astromesh (US Patent No.5680145) is a representative structural form of deployable satellite antenna widely used in recent years. The ring truss used for support is composed of multiple adjacent quadrilateral units. The relative position is fixed, and the horizontal bar rotates around the hinge at the joint...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes a ring-shaped expandable mesh antenna with a high storage ratio, which can realize the synchronous deployment of each unit without a synchronization mechanism, and the same height and The overall structure of the main network and the secondary network is symmetrical, which solves the problems of asynchronous deployment of the existing mesh extendable antenna structure, low storage ratio, and difficulty in adjusting the accuracy of the mesh surface.

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