Saturation limited parametric sonar source

Details Saturation limited parametric sonar source Saturation limited parametric sonar source

1980-11-24

1982-03-16

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Transmitter systems

With beam forming, shaping, steering, or scanning

367 92, H04B 102

Patent

active

043204740

ABSTRACT:
A selected increase in the farfield amplitude of the difference frequency am of saturation limited parametric sonar sources is obtained by an array of saturation limited parametric sources having a center-to-center spacing selected such that the primary beams launched by each source coexist in a common region where attenuation has reduced the amplitude of each primary beam to a level which precludes saturation. The selected center-to-center spacing depends upon the number of individual sources implemented and each doubling of the number of selectively spaced sources provides at least a 3 dB increase in the farfield difference frequency amplitude without changing the nominal directivity characteristics of the parametric source.

REFERENCES:
patent: 3613069 (1971-10-01), Cary, Jr. et al.
patent: 3964013 (1976-06-01), Konrad

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