Title :
A shaped dual-reflector antenna with a tilting flat subreflector for scanning applications
Author :
Garcia-Pino, Antonio ; Rappaport, Carey M. ; Rubinos, J. Oscar ; Lorenzo, M. Edita
Author_Institution :
Dept. of Tecnologias de las Communicaciones, Vigo Univ., Spain
fDate :
10/1/1995 12:00:00 AM
Abstract :
A scanning dual-offset reflector antenna using the simple motion of a flat subreflector to illuminate different parts of a shaped main reflector is presented. A particular case having a 20-degree linear field-of-view (for a DBS application) with a 30λ aperture diameter is explored. The main reflector surface is shaped to minimize the phase aberrations across the field-of-view. Once the main reflector surface is designed, the subreflector parameters are determined to ensure optimum focusing across the field-of-view
Keywords :
antenna radiation patterns; direct broadcasting by satellite; offset reflector antennas; reflector antennas; satellite antennas; scanning antennas; 20-degree linear field-of-view; DBS application; aperture diameter; main reflector surface; optimum focusing; phase aberrations; scanning applications; scanning dual-offset reflector antenna; shaped dual-reflector antenna; shaped main reflector; subreflector parameters; tilting flat subreflector; Antenna feeds; Apertures; Directive antennas; Focusing; Geometry; Radar antennas; Radar applications; Reflector antennas; Satellite broadcasting; Surface treatment;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
