Accession Number : ADD013394

Title :   Scanning Beamformer for a Very High Resolution Circular Arc Sonar.

Descriptive Note : Patent, Filed 24 Jun 81, patented 1 Nov 83,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Gilmour, George A

Report Date : 01 Nov 1983

Pagination or Media Count : 10

Abstract : 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-in/serial-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.

Descriptors :   *ACOUSTIC ARRAYS, *BEAM FORMING, *HYDROPHONES, *SONAR, *PATENTS, ARRAYS, CHARGE COUPLED DEVICES, CYLINDRICAL BODIES, ELECTROMAGNETIC WAVE FILTERS, HIGH RESOLUTION, SCANNING, TRANSVERSE WAVES

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE