Dual reflector antenna with spherical main reflector

Author

Bergmann, J.R. ; da Costa, J.C.W.

Author_Institution

Pontificia Univ., Catolica do Rio de Janeiro, Brazil

fYear

1990

fDate

7-11 May 1990

Firstpage

478

Abstract

The investigation of the design of spherical dual reflector antennas is extended without imposing any restriction on the subreflector surface. The shaping is obtained using geometrical optics, and a diffraction analysis is used to predict radiation. When compared to the work of Ramanujan et al. (1987), the geometry modifications considered allow more control over the dimension of the system, making it possible to design more compact systems. They also make it possible to increase efficiency and simultaneously to adjust the offset angle, theta /sub 0/, to reduce the crosspolar peak or to reduce the spillover effects.<>

Keywords

antenna radiation patterns; electromagnetic wave diffraction; geometrical optics; reflector antennas; antenna efficiency; antenna radiation pattern; crosspolar peak; diffraction analysis; geometrical optics; geometry; offset angle; shaping; spherical dual reflector antennas; spherical main reflector; spillover effects; subreflector surface; system dimension control; Apertures; Degradation; Feeds; Geometrical optics; Geometry; Manufacturing; Optical surface waves; Polarization; Reflector antennas; Satellite ground stations;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115150

Filename

115150