Patent ID: 6839543

Claim:
A wireless communication system having a multipath signal detection and discrimination capability, the system comprising: a first transmitting antenna capable of transmitting first signals having a first type of circular polarization, said first transmitting antenna located at a first location; a first receiving antenna capable of receiving second signals having a second type of circular polarization, while excluding the first signals, said second type of circular polarization being orthogonal to said first type of circular polarization; a second receiving antenna capable of receiving third signals having said first type of circular polarization, while excluding the second signals, said first receiving antenna and said second receiving antenna both located at a second location; and a processor coupled to said first receiving antenna and said second receiving antenna, said processor capable of processing selected signals, said selected signals being selected from either of said second signals or said third signals, said selected signals having a greater signal strength than the unselected signals, said processor located at said second location wherein said first transmitting antenna and said first and second receiving antennas comprise a first single circular polarized transmission/dual orthogonal circular polarized reception pair in a multiple antenna system, and wherein said first and second receiving antennas further comprise a dual orthogonal circularly polarized feedhorn assembly comprising: a feedhorn to communicate microwave signals, said microwave signals comprising said second and third signals, said feedhorn defining a cavity; and a waveguide housing having a first waveguide and a second waveguide in communication with said cavity at a first end of said waveguide housing so as to propagate microwave signals between said cavity and said first and second waveguides; said waveguide housing comprising: a bottom wall common to said first and second waveguides; a septum attached to said bottom wall and to a second end of said waveguide housing opposite said first end so as to partially separate said first waveguide from said second waveguide, said septum having a shape causing a right hand circularly polarized signal and a left hand circularly polarized signal received from said cavity to separate into said first and second waveguides respectively; and walls of said waveguide housing defining bends in said first waveguide and second waveguide where said septum is attached to said second end of said housing so that rear portions of said first waveguide and said second waveguide are obscured from said cavity.