Communications – electrical: acoustic wave systems and devices – Echo systems – Distance or direction finding
Patent
1993-12-01
1994-12-13
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Echo systems
Distance or direction finding
367119, 367124, 367153, 367157, 310334, 310337, G01S 1500, H04R 1700
Patent
active
053734831
ABSTRACT:
A curvilinear wideband, projected derivative-matched continuous aperture acoustic transducer includes a first curvilinear sensor having a predetermined spatial shading which is constrained to zero at its ends and has amplitude continuity between its ends; and a second curvilinear sensor area having a spatial shading which is the projected spatial derivative of the spatial shading of said first area and which has a discontinuous amplitude at its ends; the first and second spatially shaded areas being superimposed and coextensive along the sensing axis.
REFERENCES:
patent: 4166999 (1979-09-01), Brady, III
patent: 4167753 (1979-09-01), Lynk
patent: 4460841 (1984-07-01), Smith et al.
patent: 5237542 (1993-08-01), Burke et al.
"The Monopulse Sonar Concept and Its Realization for AUV Application", Charles Stark Draper Laboratory Report, 1990.
"Wide-band Monopulse Sonar", T. L. Henderson, IEEE Journal of Oceanic Engineering, vol. 14, No. 1, Jan. 1989.
Eldred J. Woodrow
The Charles Stark Draper Laboratory Inc.
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