Patent ID: 6452561
Filing Date: 2002-09-17
Classification: H01Q

Abstract:
A circular waveguide antenna feed comprising:a first circular waveguide section having a diameter for supporting electromagnetic waves of desired frequency range from a source there of; a symmetrically shaped tapering conical frustrum waveguide section of said first circular waveguide diameter and affixed concentrically for providing a low impedance means for higher order mode electromagnetic waves, while coupling said desired frequency range electromagnetic waves to output end; a second circular waveguide section having a diameter of said symmetrically shaped tapering conical frustrum waveguide smaller diameter and affixed concentrically for the propagation of the desired frequency range electromagnetic waves; a pair of electric field probes disposed in orthogonal and non-planar arrangement affixed to and protruding into said second circular waveguide section for output of linear orthogonal signal components of the desired frequency range electromagnetic waves; and a pair of radio frequency impedance posts affixed to and extending laterally through the second circular waveguide section disposed substantially parallel between said pair of electric field probes and a circular waveguide termination wall having a diameter of the second circular waveguide section and affixed concentrically to the second circular waveguide section for providing a means to separate said linear orthogonal detected signal components of the desired frequency range electromagnetic waves.