Surface acoustic wave device with reflected wave at side edges o

Details Surface acoustic wave device with reflected wave at side edges o Surface acoustic wave device with reflected wave at side edges o

1991-10-08

1993-02-09

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313B, 333195, 364821, H01L 4108

Patent

active

051855488

ABSTRACT:
A surface acoustic wave device comprises a substrate, a plurality of input transducers formed on the substrate for generating first and second surface acoustic waves propagating in opposite directions to each other, and a plurality of waveguides arranged in a direction orthogonal to the propagating direction of the first and second surface acoustic waves on a region where the first and second surface acoustic waves overlap. Each waveguide producing a third surface acoustic wave propagating in a direction where the waveguides are arranged, with the interaction between the first and second surface acoustic waves, and on at least two of the waveguides, third surface acoustic waves reflected at respective side edges cancel each other, and an output transducer converts the third surface acoustic waves propagating from the waveguides into an electrical signal.

REFERENCES:
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patent: 4556949 (1985-12-01), Solie
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patent: 5003213 (1991-03-01), Mochuzuki et al.
patent: 5073898 (1991-12-01), Endo et al.
Yasuhiko Nakagawa, et al., "Surface Acoustic Wave Convolver Using Multiple Waveguide", Electronic Communications Society Journal, vol. J69-C, No. 2, pp. 190-198 (1986) (and English translation).
"A Saw Planar Piezoelectric Convolver" by P. Defranould et al. Proceedings of IEEE, vol. 64, No. 5, May 1976.

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