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Article: Subreflector Developed for Simultaneous S and X-Band from a Single Antenna.
- Article from:
- Communications News
- Article date:
- June 1, 1985
- Author:
CopyrightCOPYRIGHT 1985 Nelson Publishing. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Satellites operating in two distinct frequency bands are becoming more common. In the case of earth resource satellites, previously developed space and ground segments continue to operate in S-band while the next generation satellites--(Landsat-D, SPOT, ERS)--will have both S and X-band down links to support the increased data rate of the improved high-resolution sensors.
In order to achieve high system G/T's in the dual bands, a dichoric subreflector has been developed as an integral part of its S and X-band antenna system. The S-band feed is located at the prime focus of the main reflector; the X-band feed operates in a Cassegrain configuration. The ...