Title :
Design method for an offset dual-shaped reflector antenna with high efficiency and an elliptical beam
Author :
Aoki, K. ; Makino, S. ; Katagi, T. ; Kagoshima, K.
Author_Institution :
Commun. Equipment Works, Mitsubishi Electric Corp., Amagasaki, Japan
fDate :
4/1/1993 12:00:00 AM
Abstract :
A newly developed method of design for a shaped reflector antenna is described. A conventional quadratic reflector configuration is assumed; the reflectors are then modified to yield the desired aperture shape and field distribution by introducing shaping functions. This method is useful for designing antennas with an arbitrary shaped beam, such as an elliptical-beam antenna, and has been verified through a 4.7 m × 2.3 m (equivalent to 3.3 m diameter) dual-band (30-20 GHz) earth-station antenna for the Japanese domestic satellite system CS. The measured aperture efficiency is more than 76%, and the ratio of the major and minor axes of the elliptical beam is 2:1
Keywords :
antenna radiation patterns; microwave antennas; reflector antennas; satellite antennas; 20 GHz; 3.3 m; 30 GHz; 76 percent; Japanese domestic satellite system; SHF; aperture shape; design method; earth-station antenna; elliptical beam; field distribution; high efficiency; offset dual-shaped reflector antenna; quadratic reflector configuration; radiation patterns; shaping functions;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
