PURPOSE: To prevent the deterioration in the gain, by providing a beam switching reflecting plate to a beam focus of a focusing beam transmission line so as to reduce the size of the beam switching reflecting plate.
CONSTITUTION: The focusing beam feeding system 8 consists of focusing reflecting mirrors 81, 82, 83, 84, which are provided to fix a primary radiator 3 and a receiver 4 on ground. A beam focus 8a of the beam feeding system 8 is constituted so as to come to the vicinity of a top of a main reflecting mirror 1, and a beam switching reflecting plate 5 is provided to this position. An incoming wave 7a is stopped at the beam focus 8a via the main reflecting mirror 1 and a sub-reflecting mirror 2 and led to the primary radiator 3 and the receiver 4 via the focusing reflecting mirrors 81, 82, 83, 84. The beam switching reflecting plate 5 is turned in a prescribed period to cut off the incoming wave 7a and to lead an incoming wave 7b to the focusing reflecting mirror 81.
MASUDA TAKENORI
AOKI KATSUHIKO
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