Wideband interference suppressor in a phased array radar
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United States of America Patent
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Jan 7, 1997
Grant Date -
N/A
app pub date -
Jun 1, 1994
filing date -
Jun 1, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A phased array radar antenna uses time-steering subarray notch weightings to produce a wideband notch in the direction of interference for Electronic-Counter-Measure (ECM) interference suppression. A predetermined set of subarray notch weightings, each set being identical for each subarray, is stored in controllers each of which is coupled to a plurality of phase shifters and attenuators for feeding radiating elements of the antenna. Interference suppressors operate from a plurality of controllers to produce a subarray pattern having a notch in the direction of interference. Beamformers then combine outputs of all time-steering subarrays in the antenna so as to produce an antenna pattern having a wideband notch in the direction of interference.
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