Determination of Ku-band earth station antenna G/T using the moon as RF source

Details Determination of Ku-band earth station antenna G/T using the moon as RF source Determination of Ku-band earth station antenna G/T using the moon as RF source

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986itim...35..344j&link_type=abstract

IEEE Transactions on Instrumentation and Measurement (ISSN 0018-9456), vol. IM-35, Sept. 1986, p. 344-348.

Physics

1

Antenna Radiation Patterns, Earth Terminals, Earth-Moon System, Lunar Radiation, Radio Emission, Superhigh Frequencies, Atmospheric Correction, Lunar Surface, Noise Temperature, Power Gain

Scientific paper

The moon has been successfully used as a calibrated source of RF emissions in determining the gain-to-noise-temperature ratios (G/Ts) of medium size C-band antennas. This method for determining G/T has recently been applied to Ku-band antennas as well, and the results have agreed well with independent measurements of gain and temperature. However, because of the fact that the moon's angular diameter may extend beyond the main lobe of the lobe antenna, a gain correction factor has to be applied. This factor requires accurate knowledge of the gain pattern for its determination, but once such knowledge has been obtained by pattern measurement, the G/T can be calculated with reasonable accuracy.

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