Patent ID: 6388537
Filing Date: 2002-05-14
Classification: H01P

Abstract:
An antenna feeding system comprising:a plurality of orthomode transducers for resolving a simultaneously received circularly polarized wave signal and a linearly polarized wave signal into a vertically polarized wave signal and a horizontally polarized wave signal and for outputting each of said vertically polarized wave signal and said horizontally polarized wave signal with respect to each polarization; a first diplexer for dividing said vertically polarized wave signal outputted from one of said orthomode transducers into at least two divided signals with respect to frequency and for outputting a divided vertically polarized wave signal having the same frequency as said circularly polarized wave signal to a signal path, which is allocated to the frequency of said circularly polarized wave signal, and for outputting a divided vertically polarized wave signal having the same frequency as said linearly polarized wave signal to a signal terminal provided for said vertically polarized wave signal, a second diplexer for dividing said horizontally polarized wave signal outputted from one of said orthomode transducers into at least two divided signals with respect to frequency and for outputting a divided horizontally polarized wave signal having the same frequency as said circularly polarized wave signal to a signal path, which is allocated to the frequency of said circularly polarized wave signal, and for outputting a divided horizontally polarized wave signal having the same frequency as said linearly polarized wave signal to a signal terminal provided for said horizontally polarized wave signal, and a hybrid circuit for synthesizing said signals transmitted from said first diplexer and from said second diplexer through said signal paths, which are allocated to the frequency of said circularly polarized wave signal, into a synthesized signal upon imparting a phase difference of ninety degrees between said signals and for outputting said synthesized signal selectively to either of a signal terminal provided for a right-handed circularly polarized wave signal or a signal terminal provided for a left-handed circularly polarized wave signal with respect to a type of said circularly polarized wave signal.