Accession Number : ADP004630

Title :   Null Generation by Phase Perturbations in an Aperture,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Rudisill,M. D. ; Terzuoli,A. J.

Report Date : JAN 1985

Pagination or Media Count : 14

Abstract : In the summer of 1983 Jacavanco demonstrated it was possible to produce nulls in the pattern of a rigid reflector by mounting discs on the reflector dish and adjusting their distance off the dish. This method of null synthesis appears to offer a new flexibility to a highly efficient and widely used antenna system. While the technique had been experimentally demonstrated, there was little or no theoretical basis for the mechanisms producing the nulls. Therefore, this study was undertaken at AFIT to attempt to develop theoretical background. Ideally this work will produce a means of predicting optimum configurations, bandwidths, etc.

Descriptors :   *ANTENNA RADIATION PATTERNS, *NULLS(AMPLITUDE), *REFLECTORS, *DISKS, FLAT PLATE MODELS, POSITION FINDING, SITE SELECTION, MATHEMATICAL PREDICTION, FAR FIELD

Distribution Statement : APPROVED FOR PUBLIC RELEASE