Title :
Design and evaluation of a shaped reflector and 4-port CP feed for dual band contoured beam satellite antenna applications
Author :
Zhi Chao Tao ; Mahadevan, K. ; Ghosh, S. ; Bergmann, J. ; Sutherland, D. ; Tjonneland, K.
Author_Institution :
SG Microwave Inc., Kitchener, Ont., Canada
Abstract :
Results of a comprehensive design and evaluation effort are presented for a shaped reflector and 4-port CP feed for a dual band contoured beam satellite antenna. The design meets stringent specifications on the gain slope within coverage contour and the isolation in the closely spaced neighbouring contours. Optimization of the reflector shape, the feed illumination function, the feed network to cater Tx/Rx CP operation have been addressed based on precision EM modelling to ascertain implementation of the design with least uncertainty. The feed system is undergoing fabrication and component level evaluations. The measured results on flight representative integrated hardware is presented and compared with predicted characteristics.
Keywords :
antenna testing; microwave antennas; multiport networks; optimisation; reflector antenna feeds; reflector antennas; satellite antennas; 3.6 to 6.3 GHz; 4-port CP feed; EM modelling; Tx/Rx CP operation; closely spaced neighbouring contours; coverage contour; design; dual band contoured beam satellite antenna applications; evaluation; fabrication; feed illumination function; feed network; gain slope; isolation; optimization; reflector shape; shaped reflector; Antenna feeds; Design optimization; Dual band; Hardware; Lighting; Microwave antennas; Network synthesis; Polarization; Reflector antennas; Satellite antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549927
