Title :
The design of classical offset Dragonian reflector antennas with circular apertures
Author :
Chang, Seunghyuk ; Prata, Aluizio, Jr.
Author_Institution :
Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
The vector aperture field of classical offset Dragonian dual-reflector antennas is derived using geometrical-optics concepts. This field then yields the equivalent paraboloid of the geometry. From these results, the conditions for an axially symmetric equivalent paraboloid, when a circular aperture is assumed, are obtained. A complete step-by-step geometrical-optics-based design procedure for optimum classical offset Dragonian antennas with circular apertures is then presented (i.e., zero geometrical-optics cross-polarization and minimum spillover). This procedure is demonstrated by two design examples.
Keywords :
aperture antennas; geometrical optics; geometrical theory of diffraction; offset reflector antennas; axially symmetric equivalent paraboloid; circular apertures; classical offset Dragonian dual-reflector antennas; geometrical-optics concepts; geometry equivalent paraboloid; minimum spillover; multireflector antennas; vector aperture field; zero geometrical-optics cross-polarization; Antenna measurements; Aperture antennas; Clocks; Collimators; Equations; Feeds; Geometry; Goniometers; Reflector antennas; Vision defects;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2003.822435
