Single-phase uni-directional acoustic wave transducer

Details Single-phase uni-directional acoustic wave transducer Single-phase uni-directional acoustic wave transducer

1991-05-01

1992-11-10

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313A, 310313D, 310313R, 333151, 333154, 333194, H01L 4108

Patent

active

051626896

ABSTRACT:
An acoustic transducer for an acoustic wave device which includes an acoustic wave propagating substrate, the transducer adapted to couple to an electrical load and/or source. The transducer includes at least a pair of comb electrodes formed on the substrate. It includes apparatus for applying an electrical load and/or source across the pair of comb electrodes. The first of the combs has a plurality of electrode fingers. The second comb has at least one electrode finger. The widths of the electrode fingers are the same. Gaps of at least two different widths are disposed between the electrodes.

REFERENCES:
patent: 3882433 (1975-05-01), Subramanian
patent: 4072915 (1978-02-01), Mitchell
patent: 4918349 (1990-04-01), Shiba et al.
patent: 5010269 (1991-04-01), Hikita et al.
patent: 5028831 (1991-07-01), Maloda et al.
Unidirectional SAW Transducer with Meander and Interdigital Electrodes, by Y. Shimizu et al., Electronics and Communications in Japan, vol. 61-B, No. 7, 1978.

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