UN SISTEMA DOPPLER DE RADIOFAROS PARA LA NAVEGACION CON FILTRO ANGULAR.

摘要

An antenna system particularly adapted for use with commutated array Doppler Navigation Beacons. Particularly in elevation determination where the Doppler array is vertically oriented, ground reflections produce multiple path errors. A fixed passive near-field microwave filter structure transmits energy from the array substantially only within an angular band on either side of a radiation normal. Parallel plate structure in the one embodiment uses a vertically extended tapered matching section within the parallel plate structure. The other embodiment employs a wire grid structure within the parallel plate structure. Both embodiments illustrated provide for angle of incidence(or radiation) sensitivity.