Stephen H Neuman

US Patent:

50722247, Dec 10, 1991

Filed:

Jul 2, 1990

Appl. No.:

7/546728

Inventors:

Charles E. Verbeke - Huntington NY
Stephen H. Neuman - East Northport NY
Martin T. Horstman - Shirley NY
Carl Schwab - Huntington Station NY

Assignee:

Cardion Electronics, Inc. - Woodbury NY

International Classification:

G01S 1342
G01S 1374

US Classification:

342152

Abstract:

A secondary surveillance radar system in which monopulse processing is used to obtain angle estimation of azimuth bearing, the improvement residing in a precision method, involving a monopulse qualifier signal, for identifying the maximum unambiguous off-boresight azimuth (OBA), while ensuring reduced sensitivity to Omni channel variations; the monopulse qualifier signal is developed from coherently combining the IF limited signals derived from the Sum+JDelta and Delta+jSum signals, such that two amplitude varying signals are created, such signals bearing a direct relationship to the Sum and Difference antenna pattern ratios and being independent of antenna signal power.