Abstract
This study proposes a novel deployable antenna consisting of a double-ring deployable truss and a cable net reflector, intended for large mesh antennas. The structural design of deployable antennas is presented, and the geometric relationship is formulated. Compared with the same type of antennas, the storage ratio of the double-ring deployable antenna is significantly improved, especially the storage ratio in the height direction. Meanwhile, the stiffness is also improved. Considering the influence of the cable net structure, a dynamic model is established using Lagrange's equation and the driving force for deployment is analyzed from the perspective of work. Finally, a 5-m prototype is fabricated to demonstrate the feasibility of the proposed structure and carry out the experiments. The deployment tests show that the antenna can be driven by driving cable to deploy successfully, the surface accuracy is also tested and the results show good repeatability of the double-ring deployable antenna.
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