Transmitting and receiving multipath sonar antenna utilizing a s

Details Transmitting and receiving multipath sonar antenna utilizing a s Transmitting and receiving multipath sonar antenna utilizing a s

1976-06-21

1977-12-27

Tudor, Harold

Communications: electrical

Selective

Addressing

340 3A, 340 8R, 340 8L, H04B 1300

Patent

active

040657485

ABSTRACT:
A simultaneously transmitting and receiving multipath sonar antenna comprs an acoustic lens which focuses received acoustic beams on a focal surface, and at least two intercalated groups of piezoelectric transducers disposed on the focal surface of the lens. The transducers of the at least two groups are tuned to different frequencies, and the transducers of each group are excited with a phase difference between one column and the next column of the same group.

REFERENCES:
patent: 2961636 (1960-11-01), Benecke
patent: 2991562 (1961-07-01), Hare
patent: 3483504 (1969-12-01), Folds et al.
patent: 3505639 (1970-04-01), Chervenak et al.
patent: 3609673 (1971-09-01), Muller
patent: 3775734 (1973-11-01), Bealor, Jr.
patent: 3928839 (1975-12-01), Warner et al.
patent: 3949349 (1976-04-01), Massa et al.

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