CORRUGATED HORN FOR INCREASED POWER CAPTURED BY ILLUMINATED APERTURE

摘要

Feed horn transmitting and receiving signals and method of making. Feed horn includes a throat section structured to convert a TE₁₁ mode to an HE₁₁ mode, an aperture section positioned opposite throat section, and a multiple-corrugation transition section connected to throat section and having a plurality of radial corrugations that substantially widen an interior of the feed horn from throat section toward aperture section. Throat section, aperture section and transition section are arranged to have a same axis of symmetry. The plurality of corrugations are dimensioned relative to one another to alter a mode content of a signal so that a more co-polarized power is radiated within a predetermined solid angle of a cone in at least one frequency band as compared to a reference feed horn employing a substantially pure HE₁₁ mode in its aperture and providing a same illumination taper at a same conical half-angle at same frequencies.