Earth Coverage Corrugated Horns (44.5 GHz and 20.7 GHz).
MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB
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Communications satellites located in geosynchronous orbits will, in addition to more specialized shaped beam of 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 Gmin of 17 - 17.5 dBi at the limb of the earth. This paper describes the design of a single mode ME11 earth coverage horn that optimizes Gmin. Measurements performed over a 5 frequency band on experimental models designed to operate at 20.7 GHz and 44.5 GHz demonstrate a Gmin 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
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation
- Unmanned Spacecraft