Title :
Composite parabola dual beam antenna with a phase compensation subreflector
Author_Institution :
NEC Corp., Yokohama, Japan
Abstract :
The author describes a dual-beam antenna, using a composite parabola with a phase compensation subreflector, which can simultaneously access two adjacent geostationary satellites. A dual-beam antenna is preferable for a satellite ground station, since the main reflector is smaller than two single-beam antennas and a minimum number of reflectors is required. An experiment was performed with a 1.27-m diameter antenna, operating in the 39/35-GHz frequency bands. The experimental data, which agreed well with the calculated data, demonstrated the validity of the design procedure and analyses. The proposed antenna uses a single main reflector subreflector configuration with the main reflector diameter only 5% larger than that of a single-beam antenna. The composite dual-beam antenna is also capable of tracking the drift of a satellite in geostationary orbit.<>
Keywords :
reflector antennas; satellite antennas; satellite ground stations; 1.27 m; 35 GHz; 39 GHz; EHF; calculated data; composite parabola dual beam antenna; experimental data; geostationary orbit; geostationary satellites; phase compensation subreflector; reflector diameter; satellite drift tracking; satellite ground station; Antenna measurements; Apertures; Beam steering; Directional antennas; Extraterrestrial measurements; Frequency; Mirrors; National electric code; Satellite communication; Satellite ground stations;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.135030
