High storage ratio winding rib type deployable antenna structure

Abstract

The invention relates to a high-storage-ratio winding rib type expandable antenna structure which comprises a mounting base, a center body which is hollow inside and arranged on the mounting base; a telescopic feed source arranged in the center body; a plurality of elastic winding ribs arranged surrounding the outside of the bottom of the center body; a metal mesh surface tensioned and laid on theelastic winding rib and matched with the unfolded elastic winding ribs to form a parabolic reflection surface; a locking assembly comprising a bottom groove which is arranged on the mounting base around the center body, a locking hoop used for restraining the elastic winding ribs to be unfolded and having the bottom in the bottom groove, an upper top plate arranged at the top end of the telescopic feed source and pressing the upper end of the locking hoop, and a locking rope; a release assembly comprising a round rod hot cutter in contact with the locking rope and an external power supply. Compared with the prior art, the elastic winding ribs are used for tensioning the metal mesh surface to form the parabolic reflection surface, ultra-high storage ratio and unfolding reliability can be provided, and enough surface precision is achieved.

Description

Technical field [0001] The invention belongs to the field of aerospace structures, and relates to a high storage ratio winding rib type expandable antenna structure. Background technique [0002] In recent years, the technology of small satellites has developed rapidly. Among them, the rookie CubeSat (CubeSat), which has developed to the initial stage of functional application abroad, has the advantages of low development and launch cost and short period of small satellites, and can also be standardized and modularized. The design is highly scalable, flexible in launch, and rapid networking. The CubeSat distributed space system has low comprehensive cost and high efficiency, and can play an important role in reconnaissance and communication, so its strategic value is high. [0003] The structure of the CubeSat antenna is mainly a monopole antenna. The monopole antenna has low gain. If the antenna gain can be increased, the quality of satellite communication can be greatly improve...

AI Technical Summary

Problems solved by technology

In 2012, the cube satellite AENEAS designed by the USC (University of Southern California / Space Engineering Research Center) was successfully launched. The satellite antenna is a radial rib paraboloid with a diameter of 0.5m, a storage volume of 2U, and a working frequency band of S-band; JPL has started research and development. The high-speed ultra-miniature high-gain antenna with a working frequency of 37.5GHz has a diameter of 0.5m, a storage volume of 1.5U, and a high gain of 46dBi; Boeing proposed an ultra-small winding rib reflector antenna in 2011 with a diameter of 0.5m. The working band is S-band, and the storage volume is reduced to 0.5U, but the reflector antenna is only a conceptual model, the surface accuracy is poor, and the locking and releasing methods are unknown

Domestic spaceborne antenna research focuses on large-aperture reflector antennas, and reflector antennas suitable for cube satellites are still in their infancy

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