Method and apparatus for rotating an electronically-scanned rada

Details Method and apparatus for rotating an electronically-scanned rada Method and apparatus for rotating an electronically-scanned rada

1993-05-19

1998-10-20

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Air traffic control

Secondary surveilance radar

342372, H01Q 334

Patent

active

058253220

ABSTRACT:
A method and apparatus for controlling the scan rate of an electronically-scanned (E-scan) antenna (24) of a secondary radar system to provide a variable-dwell time for the E-beam (62) of the E-scan antenna (24) at selected scan angles. The secondary radar system operates in conjunction with a primary radar antenna (20) that scans at a constant angular rate throughout a scan cycle. The E-scan antenna (24) scans through any given azimuth sector at an approximately constant data rate, whereby the beam (62) remains in the azimuth sectors that have high-target densities (52) for extended periods of time and moves rapidly through azimuth sectors that have low-target densities (54).

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