Direction-finding array of crossed dipoles

Details Direction-finding array of crossed dipoles Direction-finding array of crossed dipoles

1978-04-13

1980-06-10

Tubbesing, T. H.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

G01S 380

Patent

active

042076226

ABSTRACT:
A direction-finding array system which uses a plurality of hydrophones in a rossed 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.

REFERENCES:
patent: 3383690 (1968-05-01), Keller
patent: 3935575 (1976-01-01), Leisterer et al.
patent: 4119942 (1978-10-01), Merklinger

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