Accession Number : ADP007427

Title :   Scan Correction Technique for Cylindrical Arrays,

Corporate Author : TIDEWATER ATLANTIC RESEARCH WASHINGTON NC

Personal Author(s) : Yon, James B.

Report Date : FEB 1992

Pagination or Media Count : 13

Abstract : Scanning in the curved plane of a cylindrical array causes the projected distribution to become skewed. This results in poor pattern performance such as broadened beamwidth, shallow difference beam null depth, and raised near-in sidelobes. Using traditional techniques to compensate for this distortion requires individual element control making the design too costly, A much less costly approach is achieved given a monopulse sum and difference architecture. By mixing a portion of the sum illumination taper with the difference illumination taper and vice versa, both patterns can simultaneously be corrected. This principle was first reported on by John Antonucci and Peter Franchi in a paper called 'A Novel Method To Correct Radiation Pattern Distortion Of Conformal Antennas'. Their study shows that by minimizing the skewness of the projected sum distribution the modified distributions greatly improve the sum pattern and somewhat improve the difference pattern. This paper carries their study one step further by optimizing the difference pattern to maximize null depth. This provides an optimal set of monopulse receive beams.

Descriptors :   *SCANNING, *SKEWNESS, APPROACH, ARCHITECTURE, ARRAYS, CONTROL, DEPTH, DISTORTION, DISTRIBUTION, ILLUMINATION, MIXING, PATTERNS, RADIATION, RADIATION PATTERNS, RADAR EQUIPMENT, SYMPOSIA.

Subject Categories : Computer Hardware
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE