Surface acoustic wave device provided with output transducer spl

Details Surface acoustic wave device provided with output transducer spl Surface acoustic wave device provided with output transducer spl

1991-08-27

1993-04-06

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

333154, 364821, H01L 4108

Patent

active

052006638

ABSTRACT:
A surface acoustic wave device comprises a piezoelectric substrate, a plurality of input transducers, formed on the substrate, for generating surface acoustic waves corresponding to input signals, a plurality of waveguides which are juxtaposed on a region of said substrate where the surface acoustic waves generated by said input transducers overlap each other, and in which signals are generated due to an interaction of the surface acoustic waves, the waveguides generating surface acoustic waves corresponding to the signals due to the interaction, and an output transducer for receiving the surface acoustic waves generated from the waveguides, converting the signals due to the interaction into electrical signals, and extracting the electrical signals, the output transducer being constituted by a plurality of portions, juxtaposed in a widthwise direction of the surface acoustic waves generated from the waveguides, for receiving some components of the surface acoustic waves generated from the waveguides, and outputting signals, the portions being connected to each other, so that electric fields of electrical signals output from said portions are synthesized in the same direction.

REFERENCES:
patent: 3833867 (1974-09-01), Solie
patent: 4798987 (1989-01-01), Nakamura
patent: 5003213 (1991-03-01), Mochuzuki et al.
"Surface Acoustic Wave Convolver Using Multiple Waveguide" by Yosuhiko Nakagawa et al., Electronic Communication Society Journal vol. J69-C, No. s pp. 190-198 (1986).
"A New Interdigital Electrode Transducer Geometry" by K. Lakin et al. IEEE Transactions on Microwave Tehory and Techniques, Aug. 1974 vol. MTT-22, No. 8 pp. 763-768.
"Surface Acoustic Wave Convolver Using Multi-Channel Waveguide" Nakagawa et al. Japanese Journal Of Applied Physics, vol. 28, No. Sup2, 1989, Kyoto pp. 221-223.
"Surface Acoustic Wave Engineering" by H. Shibayama, Soc. of Electronic Communication., pp. 82-102, 1983.

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