Title :
Offset Gregorian reflector shaping for optimum sensitivity
Author :
de Villiers, Dirk I. L. ; Lehmensiek, Robert
Author_Institution :
Dept. of Electr. & Electron. Eng., Stellenbosch Univ., Stellenbosch, South Africa
Abstract :
Dual offset Gregorian reflector shaping can provide improved sensitivity performance by reducing radiometric noise and improving aperture efficiency. Optimizing the shaped system for optimum sensitivity performance is slow due to the full radiation pattern integration required to calculate the radiometric noise temperature. This paper shows that, in certain situations for a feed-down sub-reflector mount, the optimum aperture efficiency result, which is fast to calculate, guarantees a near optimum sensitivity system.
Keywords :
antenna radiation patterns; offset reflector antennas; sensitivity analysis; aperture efficiency; dual offset Gregorian reflector shaping; feed-down subreflector mount; full radiation pattern integration; radiometric noise temperature; sensitivity performance; Antenna radiation patterns; Apertures; Feeds; Noise; Radiometry; Sensitivity; Temperature sensors;
Conference_Titel :
Electromagnetics in Advanced Applications (ICEAA), 2014 International Conference on
Conference_Location :
Palm Beach
Print_ISBN :
978-1-4799-7325-5
DOI :
10.1109/ICEAA.2014.6903927
