CONVERTER FOR CIRCULARLY POLARIZED WAVE RECEPTION

PROBLEM TO BE SOLVED: To receive the radio waves of single circularly polarized waves and double circularly polarized waves transmitted from two satellites on the same orbit by one antenna system. SOLUTION: The signals of the single circularly polarized waves and the double circularly polarized waves transmitted from the two satellites on the same orbit are received in a horn circuit part 1 and synthesized by the phase difference of 90 degrees by a hybrid circuit 6 and the signals of leftward circularly polarized waves and rightward circularly polarized waves are taken out. The signals of the rightward circularly polarized waves for instance outputted from the hybrid circuit 6 are converted to the signals of an intermediate frequency band in a mixer 15 and sent out from an output terminal 20 to a BS tuner for instance. Also, the signals of the leftward circularly polarized waves and the rightward circularly polarized waves outputted from the hybrid circuit 6 are selected by changeover signals from a CS tuner and the selected signals are converted to the signals of the intermediate frequency band and sent out from the output terminal 18 to the CS tuner.