Directional energy receiving systems for use in the indication o

Details Directional energy receiving systems for use in the indication o Directional energy receiving systems for use in the indication o

1985-05-13

1998-03-17

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367126, G01S 380

Patent

active

057295077

ABSTRACT:
The bearing accuracy and long-range sonar target detection capability of a multi-cardioid directional receiving hydrophone array is improved by electronically producing mirror images of the cardioid directional patterns of each directional hydrophone in the array whereby the number of receiving channels are effectively doubled by this invention which in turn results in higher signal-to-noise ratios especially when receiving distant relatively weaker sonar signals. As a result, the accuracy of measurement of target range and bearing by the improved directional hydrophone array will be significantly increased.

REFERENCES:
patent: 2324548 (1943-07-01), Wheeler
patent: 4305141 (1981-12-01), Massa

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