Rapid Calculation of Antenna Noise Temperature in Offset Gregorian Reflector Systems

Antenna noise temperature calculations of reflector systems is often a slow process and makes direct optimization of the sensitivity of these systems a difficult and time-consuming task. This paper presents an improvement to a recently proposed method to speed up these calculations by several orders...

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Bibliographic Details
Published inIEEE transactions on antennas and propagation Vol. 63; no. 4; pp. 1564 - 1571
Main Authors de Villiers, Dirk I. L., Lehmensiek, Robert
Format Journal Article
LanguageEnglish
Published New York IEEE 01.04.2015
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna radiation patterns
Brightness temperature
Feeds
Land surface temperature
Noise
Noise temperature
Radio astronomy
Reflector antennas
Temperature sensors
radio astronomy
reflector antennas
Noise temperature
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Summary:Antenna noise temperature calculations of reflector systems is often a slow process and makes direct optimization of the sensitivity of these systems a difficult and time-consuming task. This paper presents an improvement to a recently proposed method to speed up these calculations by several orders of magnitude for large dish systems. The accuracy of the improved method is tested for several types of offset Gregorian systems, and errors are shown to be in the order of a few percent. Comparisons of several layers of simplification to a standard brightness temperature model are also presented to aid the designer in the choice of model complexity to use.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2015.2399933