Patent ID: 7791431

Claim:
A vertical or horizontal polarization receiver using a 3-port orthogonal mode transducer, comprising: the 3-port orthogonal mode transducer configured to receive a K-band (20 GHz) vertical or horizontal signal transmitted from a satellite as two ±45 degree signals; a signal synthesizer configured to synthesize the +45 degree vertical or horizontal polarization signal and the −45 degree vertical or horizontal polarization signal received in the 3-port orthogonal mode transducer and output a final vertical or horizontal polarization signal; a first branch unit configured to branch the +45 degree vertical or horizontal polarization signal received in the 3-port orthogonal mode transducer; a second branch unit configured to branch the −45 degree vertical or horizontal polarization signal received in the 3-port orthogonal mode transducer; an analog/digital converter configured to convert the analog vertical or horizontal signals respectively branched by the first branch unit and the second branch unit into digital vertical or horizontal polarization signals; and a controller configured to compare intensities of the digital vertical or horizontal polarization signals and output rotation information of the 3-port orthogonal mode transducer according to a comparison result.