Accession Number : ADD007396

Title :   Direction-Finding Array of Crossed Dipoles.

Descriptive Note : Patent,


Personal Author(s) : Miller,Harry B

Report Date : 10 Jun 1980

Pagination or Media Count : 8

Abstract : A direction-finding array system which uses a plurality of hydrophones in a crossed dipole configuration and a phase-detection system. It is basically a time-of-arrival (TOA) system which is modified to act like a phase-detection system and is able to share much of the electronics of existing acoustic intercept receivers. Acoustic signals of a high frequency generated by an acoustic target under investigation are apparently heterodyned to obtain corresponding signals of an appropriate lower frequency. The apparently heterodyned signals are then processed in two identical processors giving rise to two outputs which are applied to x- and y- axes of a cathode ray of oscilloscope or the like to obtain unambiguous bearing information about the acoustic target. Three dimensional bearing angle information is obtained by using a third processor which is identical to the two processors used in a two dimensional case. (Author)

Descriptors :   *Patents, *Direction finding, Acoustic arrays, Acoustic signals, Hydrophones

Subject Categories : Direction Finding

Distribution Statement : APPROVED FOR PUBLIC RELEASE