Displaced-Phase-Center Antenna Technique

VOLUME 12, NUMBER 2, 2000 LINCOLN LABORATORY JOURNAL 281 T -- antenna technique, or DPCA, improves the performance of moving-target-indicator (MTI) radars mounted on moving platforms. By shifting the effective radiation center of the antenna backward, the DPCA technique compensates for the forward motion of the moving platform so that, over a few pulserepetition intervals, the antenna is effectively stationary in space. The lack of motion of the radiating antenna causes a great narrowing of the spread of the main-beam ground-clutter Doppler spectrum, allowing detection of low-velocity targets that would otherwise be hidden within the spectrum. In this article we are using the acronym MTI in a generic sense, in reference to any technique that Displaced-Phase-Center Antenna Technique

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