Title :
First-order aberrations on generalized classical axially-symmetric dual-reflector antennas
Author_Institution :
Dept. of Electron. Eng., Fed. Univ. of Minas Gerais, Belo Horizonte, Brazil
Abstract :
This work presents a first-order treatment of aberrations caused by small feed displacement in classical axially-symmetric dual-reflector antennas. A general and closed-form analysis (based on geometrical optics) of the aberrated aperture field is derived in terms of the reflector geometry and feed illumination. The consequence to the aperture efficiency and main-beam tilt are illustrated for an axially-displaced-ellipse configuration.
Keywords :
aberrations; aperture antennas; geometrical optics; reflector antennas; aberrated aperture field; aperture efficiency; axially-displaced-ellipse configuration; classical axially-symmetric dual-reflector antennas; closed-form analysis; feed illumination; first-order aberrations; geometrical optics; main-beam tilt; reflector geometry; small feed displacement; Antenna feeds; Aperture antennas; Closed-form solution; Delta modulation; Frequency; Geometrical optics; Lighting; Polarization; Web and internet services;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.875341
