Patent ID: 6661384
Filing Date: 2003-12-09
Classification: H01Q

Abstract:
A mirror surface accuracy measuring device of a reflector antenna, in which mirror surface accuracy of a reflector antenna having a main reflector including a plurality of mirror panels is measured, comprising:a collimation antenna arranged at an interval of a prescribed distance from the reflector antenna; radiation field distribution measuring means for measuring a radiation field distribution of the reflector antenna for the prescribed distance of the collimation antenna while controlling an attitude of the reflector antenna; a mirror panel radiation field distribution holding device for holding a panel radiation field distribution of each mirror panel of the main reflector as pre-measured data; complex excitation coefficient calculating means for calculating a complex excitation coefficient of each mirror panel of the main reflector according to the radiation field distribution of the reflector antenna measured by the radiation field distribution measuring means, the panel radiation field distribution of the mirror panel held in the mirror panel radiation field distribution holding device and an antenna attitude signal which indicates the attitude of the reflector antenna controlled by the radiation field distribution measuring means; and mirror surface accuracy calculating means for calculating a mirror surface error of each mirror panel and mirror surface accuracy of the main reflector according to the complex excitation coefficients of the mirror panels of the main reflector calculated by the complex excitation coefficient calculating means.