Title :
Scan limitations of shaped dual-offset reflector antennas for multiple satellite access
Author :
Bird, T.S. ; Sprey, M.A.
Author_Institution :
CSIRO, Div. of Radiophys., Epping, NSW, Australia
Abstract :
The performance of offset Cassegrain antennas, shaped to provide wide scan angles, is outlined for use in earth stations which are capable of accessing several satellites simultaneously. The effect on the beam efficiency of scanning over a rectangular-shaped coverage region located about the geostationary arc is described. Limitations on scan performance are discussed as is the effect of satellite tracking by feed movement.
Keywords :
directive antennas; microwave antennas; reflector antennas; satellite antennas; satellite ground stations; scanning antennas; Cassegrain antennas; beam efficiency; earth stations; feed movement; geostationary arc; multiple satellite access; rectangular-shaped coverage region; reflector antennas; satellite tracking; scan performance; shaped dual-offset; wide scan angles;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19900154
