Accession Number : ADP003517

Title :   Synthesis of Offset Dual Shaped Subreflector Antennas for Control of Cassegrain Aperture Distributions,

Corporate Author : CALIFORNIA INST OF TECH PASADENA

Personal Author(s) : Galindo-Israel,V. ; Mittra,R.

Report Date : MAR 1984

Pagination or Media Count : 32

Abstract : Many existing large ground reflector antennas have been designed as Cassegrain systems - i.e., paraboloid/hyperboloid-combinations. Other large ground antennas are simply paraboloid designs. Upgrading the gain of these systems to a gain comparable to that obtainable with a daul shaped reflector antenna system has been an important and costly objective of many such ground stations. A potentially economic method for such an antenna upgrade is presented herein. It involves a redesign of only the subreflector portion of a Cassegrain antenna or the introduction of a subreflector feed system for a paraboloid. A pair of offset subreflectors are synthesized which will give a controllable high gain amplitude distribution in the aperture of the large paraboloid.

Descriptors :   *Cassegrain antennas, *Reflectors, *Antenna apertures, *Parabolic bodies, Ground stations, Antenna feeds, X band, S band, Ground level, Antennas, Synthesis, Economics, Shape

Distribution Statement : APPROVED FOR PUBLIC RELEASE