An H-configuration spaceborne antenna deployable mechanism

Abstract

The invention discloses an H-structure spaceborne-antenna unfoldable mechanism, which comprises a plane antenna component and an unfolding mechanism, wherein the plane antenna component and the unfolding mechanism are symmetrically arranged at the two sides of a satellite platform; the plane antenna component comprises a left wing plane antenna and a right wing plane antenna; the unfolding mechanism comprises left wing unfolding mechanisms and right wing unfolding mechanisms; one group of left wing unfolding mechanisms comprises a Y-shaped inclined support type support truss, a driving mechanism and a driving support rod; in the folding state, the left wing plane antenna is gathered at the side surface of the satellite platform in a tightly compressed way; in the unfolding state, the left wing planes are unfolded at the upper end of the satellite platform. The H-structure spaceborne-antenna unfoldable mechanism has the advantages that the folding base frequency of the plane antenna is improved by using the support truss; the problem of too low base frequency of the antenna due to too long cantilever of the H-structure plane antenna in the folding state can be effectively solved; the universalization of the satellite platform is realized; in addition, rod elements are only added in local positions.

Description

technical field [0001] The invention belongs to the technical field of deploying mechanisms for planar antennas of spacecraft, and in particular relates to a deployable mechanism for retracting and deploying H-configuration spaceborne antennas. Background technique [0002] Due to the special requirements for the electrical module division of planar SAR antennas, the "H" type has become one of the main structural forms of subsequent spaceborne SAR satellites. For a planar antenna, this configuration makes the antenna in a cantilever state, therefore, it cannot be fixed with the satellite platform, and the force of the antenna is bad. In order to solve the problem that the fundamental frequency of the planar antenna is too low in the folded state and improve the dynamic characteristics of the planar antenna’s emission environment, currently domestic and foreign aerospace vehicles have adopted a variety of effective technical solutions around how to reduce the length of the ca...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides an expandable mechanism for an H-configuration space-borne antenna. By setting a Y-shaped slanted support truss, the folded fundamental frequency of the planar antenna is improved, and the "H"-configured planar antenna is effectively solved due to the cantilever failure in the folded state. The base frequency of the antenna is too low caused by too long; at the same time, the generalization of the satellite platform is realized

Images