Accession Number : ADA198922

Title :   Phase-Only Nulling with Coarsely Quantized Phase Shifters in Non-Principal Plane Pattern Cuts.

Descriptive Note : Rept. for Dec 86-Apr 87,

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB NY

Personal Author(s) : Shore, Robert A. ; Franchi, Peter R.

Report Date : JUL 1987

Pagination or Media Count : 24

Abstract : The purpose of this report is to show that deep nulls can be imposed at specified locations in pattern cuts parallel to the principal plane cuts of planar array patterns using phase-only control of coarsely quantized phase shifters. This is done by using the number of phase shifters available for control in the columns of the array to compensate for the small number of bits of the individual phase shifters. A null synthesis algorithm is derived to calculate the phase shifts to impose nulls in the nu = nu1 pattern cut of planar array antenna patterns by matching the pattern of a linear array with nulls imposed at the same locations using continuously variable, combined phase and amplitude control. Results of calculations are presented. Keywords: Planar array antennas, Phase quantization, Phase only weight control, Null synthesis, Antenna radiation patterns. (jhd)

Descriptors :   *ANTENNA RADIATION PATTERNS, *PHASE SHIFT CIRCUITS, ALGORITHMS, AMPLITUDE, ANTENNA ARRAYS, LINEAR ARRAYS, NULLS(AMPLITUDE), PHASE CONTROL, PHASE SHIFT, PLANAR STRUCTURES, QUANTIZATION, SYNTHESIS, WEIGHT.

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE