Title :
Beam squint determination in conic-section reflector antennas with circularly polarized feeds
Author :
Duan, Dah-Weih ; Rahmat-Samii, Yahya
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
5/1/1991 12:00:00 AM
Abstract :
The beam squint phenomenon in circular-polarized-feed paraboloidal, Cassegrain, and Gregorian antennas is characterized. The geometrical optics/aperture field method is used to derive generalized squint-predicting formulas, the accuracy of which is verified by computer simulations based on diffraction analysis. From these formulas, the squint-free conditions are developed. An extension of these formulas is suggested to predict the squint angles for general multireflector antennas
Keywords :
antenna feeders; antenna theory; geometrical optics; reflector antennas; Cassegrain antennas; Gregorian antennas; beam squint phenomenon; circularly polarized feeds; conic-section reflector antennas; diffraction analysis; geometrical optics/aperture field method; multireflector antennas; paraboloidal antennas; squint angles; squint-free conditions; Accuracy; Analytical models; Antenna feeds; Apertures; Directive antennas; Geometrical optics; Optical polarization; Predictive models; Reflector antennas; Solid modeling;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
