Accession Number : ADP003410

Title :   Earth Coverage Corrugated Horns (44.5 GHz and 20.7 GHz),

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Weikle,D. C.

Report Date : MAR 1984

Pagination or Media Count : 19

Abstract : Communications satellites located in geosynchronous orbits will, in addition to more specialized shaped beam or area coverage antennas, generally utilize earth coverage antennas designed to maximize antenna gain over the entire surface of the visible earth. In the microwave and millimeter wave bands, these antennas are usually conical horns which achieve a minimum gain of 17 - 17.5 dBi at the limb of the earth. This paper describes the design of a single mode earth coverage horn that optimizes minimum gain. Measurements performed over a 5% frequency band on experimental models designed to operate at 20.7 GHz and 44.5 GHz demonstrate a minimum gain 17.8 dBi. Other characteristics of the horns are circularly symmetric radiation patterns, low VSWR (1.2), and peak gain of approximately 22.0 dBi. (Author)

Descriptors :   *Horn antennas, Area coverage, Communication satellites, Orbits, Gain, Optimization

Distribution Statement : APPROVED FOR PUBLIC RELEASE