Scanning Beamformer for a Very High Resolution Circular Arc Sonar.
Patent, Filed 24 Jun 81, patented 1 Nov 83,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A high resolution scanning beamformer for a soundhead having a circular or a cylindrical array of hydrophones uses charge coupled devices as transversal filters in a plurality of first stage quadrature sampled phase shift steered beamforming modules. In a second, stage, serial-inserial-out charge coupled devices are used to correct for fill time. The sonar focuses at all nearfield ranges of interest by controllably varying a clocking rate.
- Acoustic Detection and Detectors