J1910204 Path-length control for a reflector antenna using piezoelectric actuators

Abstract

A novel method for correcting path length errors of a reflector antenna system using piezoelectric stack actuators is developed and its feasibility is investigated. Piezoelectric stack actuators are usually used for only pushing; therefore that causes some trouble in shape control of the reflector system. In order to overcome the problem, piston mode of wave front is utilized to make control inputs for the actuators positive value. Some numerical simulations are carried out to investigate the feasibility of the method. The results of these simulations show that the antenna gain is recovered adequately by using the developed method.