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Article: ANTENNAS: The Interface with Space.
- Article from:
- Via Satellite
- Article date:
- September 10, 1999
CopyrightCOPYRIGHT 1999 Access Intelligence, LLC. 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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by Robert A. Nelson
The antenna is the most visible part of the satellite communication system. The antenna transmits and receives the modulated carrier signal at the radio frequency (RF) portion of the electromagnetic spectrum. For satellite communication, the frequencies range from about 0.3 GHz (VHF) to 30 GHz (Ka-band) and beyond. These frequencies represent microwaves, with wavelengths on the order of one meter down to below one centimeter. High frequencies and the corresponding small wavelengths permit the use of antennas having practical dimensions for commercial use. This article summarizes the basic properties of antennas used in satellite communication ...
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