Inflatable antenna with expandable space

Abstract

The invention relates to an inflatable antenna with an expandable space. The inflatable antenna at least comprises a flexible antenna folding surface and an unfolding assembly. The unfolding assemblyis composed of at least two stages of unfolding assemblies which can be sequentially driven by taking the inflation pressure as the driving force thereof and respectively connected to different heights on the folding surface of the flexible antenna. The first stage of unfolding assembly can expand outwards under the driving effect of taking the inflation pressure as the driving force applied to the first stage of unfolding assembly so as to drive at least one part of the folding surface of the flexible antenna to unfold. When the first stage of unfolding assembly is expanded to a first-stage complete unfolding position, the second stage of unfolding assembly expands in a graded manner in such a way that the shape memory effect of a shape memory material plate positioned on the folding surface of the flexible antenna is released under the effect of the driving force applied to the second stage of unfolding assembly. In this way, the folding surface of the flexible antenna is controllably unfolded in an incomplete or complete space manner in a graded manner from bottom to top in a manner of increasing the effective unfolding area and reducing the unfolding 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...

AI Technical Summary

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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