Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1985-04-01
1987-04-28
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367100, 367123, G01S 380
Patent
active
046619372
ABSTRACT:
A multibeam acoustic apparatus utilizing a linear array of hydrophone elements in a sonar system includes a cascaded ladder capacitance-inductance network for coupling electrical signals to and from the individual hydrophone elements. The hydrophone elements are connected in series and the natural capacitance of these elements provides the capacitive characteristics of the network. Shunt inductors supply the inductance characteristics and provide a phase characteristic inversely related to frequency. Variable cumulative phase delays are provided for signals applied to successive hydrophone elements whereby a sonar beam is formed in a direction determined by the frequency of the exciting signal.
REFERENCES:
patent: 3419845 (1968-12-01), Thiede et al.
patent: 4423494 (1983-12-01), Groves et al.
Pihulic Daniel T.
Sperry Corporation
Tarcza Thomas H.
Terry Howard P.
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