A space-deployable inflatable antenna

Abstract

The invention relates to a space-expandable inflatable antenna. The inflatable antenna at least includes a flexible antenna folding surface and an unfolding assembly. The unfolding assembly is sequentially driven by the inflation pressure as a driving force and is respectively connected to at least one flexible antenna folding surface at different heights. The two-stage deployment assembly is composed of a first-stage deployment assembly that can expand outwards under the driving force of the inflation pressure applied to it to drive at least part of the folding surface of the flexible antenna. After the first-stage deployment assembly expands to When the first stage is fully unfolded, the second stage unfolding assembly expands stepwise by releasing the shape memory effect of the shape memory material plate on the folding surface of the flexible antenna due to the driving force applied to it, so that the flexible antenna is folded Incomplete or complete spatial deployment is carried out step by step from bottom to top in a controllable way to increase the effective deployment area and reduce the deployment impact overload.

Description

technical field [0001] The invention relates to the fields of aerospace technology and antenna technology, in particular to a space expandable inflatable antenna. Background technique [0002] The issue of antenna deployability is especially important as the size of satellites becomes smaller. While the sensors and operating electronics of miniaturized satellites can be scaled to extremely small volumes, the wavelengths of the signals used by such miniaturized satellites for communication do not scale accordingly. Given that the wavelength of a signal determines the size of the antenna used to transmit that signal, antennas for miniaturized satellites are still of similar size to larger satellites. Geostationary orbit satellites and deep space exploration activities require long-distance communication measurement and control, so it is very important to ensure that the receiving end has a large signal power, and the only way to ensure that the receiving end has a large signa...

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Problems solved by technology

[0010] In the inflatable flexible antenna and its deployment method provided by this patent, because the deployment process depends on the deployment of the mechanical structure and its driving mechanism is complicated, the reliability of the deployment is low. Both the amount and the filling rate are uncontrollable, so there are many uncontrollable factors in the deployment process. At the same time, the uncontrollable deployment process and the impact of the launch impact force during the satellite launch will cause obvious shock and vibration in the overall structure, and the anti-interference The ability is poor, although the storage ratio is improved, the stability and controllability of the unfolding process is poor

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