Accession Number : ADP001104

Title :   Constraints on Nulling Bandwidth,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s) : Franchi,Peter R.

Report Date : JAN 1983

Pagination or Media Count : 13

Abstract : Recently there has been substantial interest in wideband nulling techniques and accompanying physical limitations imposed by the antenna system. Pattern nulls may be imposed deterministically or adaptively and the antenna patterns are often degraded by excitation errors. This paper is concerned with wide angle nulls in ideal (non-errored) patterns. For such patterns wide angle nulls are equivalent to wideband nulls. For an M-element array there are at most M-1 nulls possible in angle. A limiting possibility would be to move all M-1 nulls to within some small angular region, delta mu and accept the fact that the resulting pattern would bare no resemblance to the original; this approach would give the lowest possible null depth for any particular wide angle band.

Descriptors :   *Broadband antennas, *Wide angles, *Antenna radiation patterns, *Nulls(Amplitude), Physical properties, Excitation, Patterns, Depth, Limitations, Broadband, Regions, Antennas, Angles, Errors, Symposia

Distribution Statement : APPROVED FOR PUBLIC RELEASE