A multifrequency, broadband, dual-polarized corrugated conical horn antenna is simultaneously fed a multiplicity of signals, two for each of five frequencies, with each of a pair of signals fed in each of two orthogonal planes for excitation of a desired spherical hybrid mode (HE.sub.11). The lowest...http://www.google.fr/patents/US4258366?utm_source=gb-gplus-shareBrevet US4258366 - Multifrequency broadband polarized horn antenna
Multifrequency broadband polarized horn antenna
Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch et autres
