Patent ID: 7304552

Claim:
A waveguide for use with a dual polarization waveguide system for receiving at least two signals which are orthogonally polarized, said waveguide comprising a waveguide tube into which at least two orthogonally polarized signals are received for transmission therealong, said waveguide having; a first probe extending from a wall of the waveguide tube into an interior of the waveguide tube, said first probe lying in a first longitudinal plane and being adapted to receive a first one of said orthogonally polarized signals traveling in longitudinal plane, a reflector extending from the wall of the waveguide tube, said reflector located downstream of the first probe and lying in the first longitudinal plane for reflecting said first one of said orthogonally polarized signals back to said first probe and allowing a second one of said orthogonally polarized signals to pass along the waveguide tube, a second probe located downstream of said reflector and extending from the wall of said waveguide tube into the interior of the waveguide tube and lying in said first longitudinal plane, a signal reflector and rotator, including a short circuit at an end of the waveguide tube, said signal reflector and rotator located downstream of said second probe for receiving, rotating and reflecting said second one of said orthogonally polarized signals back along said waveguide tube such that the rotated and reflected signal is received by said second probe, said signal reflector and rotator also including, a differential phase shifter disposed between the second probe and the short circuit, said differential phase shifter having a slightly asymmetrical cross section provided by an elliptical section in said waveguide tube, whereby a first component of said second one of said orthogonally polarized signals is phase shifted with respect to a second component of said second one of said orthogonally polarized signals in the differential phase shifter, then said first and second components are reflected respectively from said short circuit and a reflector plate before said first component is further phase shifted when traveling back through the differential phase shift portion for recombination with said second component, said reflected first and second components having different cut off wavelengths, to provide a recombined signal for detection by said second probe.