Abstract

A large offset antenna, which is used as military satellite communication terminal, is generally operated in extremely harsh environments. As a very large reflector is mounted, the reflector has to undergo communication performance tests for external forces such as wind vibrations. Wind vibration tests have been replaced with artificial wind tests conducted using large fans because of space and cost constraints. Therefore, there is a need to improve the communication performance through vibration reduction for the excitation force caused by artificial wind. In this study, the frequency characteristics were verified by analyzing the excitation force caused by artificial wind, and a vibration reduction methodology was presented based on the finite element model which was verified via experiments. This study suggested a general vibration reduction approach for large offset antennas and is expected to be useful in industries.

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