Elliptical, interdigital transducer

Details Elliptical, interdigital transducer Elliptical, interdigital transducer

1976-08-18

1977-09-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4104

Patent

active

040499820

ABSTRACT:
An elliptical, interdigital transducer having a plurality of concentric elliptically shaped conductive fingers situated in one quadrant of an ellipse and mounted on a piezoelectric material. Upon the application of an excitation frequency to said transducer a low frequency surface wave will propagate along the major axis of the ellipse and a high frequency surface wave will propagate along the minor axis of the ellipse. Resonance will occur at a predetermined point on a line through the elliptically-shaped fingers and the focus of the ellipse.

REFERENCES:
patent: 3727718 (1973-04-01), Whitehouse
patent: 3919669 (1975-11-01), Hartemann

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