Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1980-12-24

1982-09-21

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

310313D, 333153, 333194, 333195, H03H 9145, H03H 925, H03H 942, H03H 964

Patent

active

043509630

ABSTRACT:
A surface acoustic wave device comprises a piezoelectric substrate, and an input transducer and an output transducer formed on the substrate. Dummy transducers are formed on the substrate and arranged to extend from the ends of the input and output transducers toward the ends of the substrate. The dummy transducers individually include electrodes spaced at the same pitch as the electrode pitch in the input and output transducers. Accordingly, there is no occurrence of reflections of the surface acoustic wave at the ends of the input and output transducers.

REFERENCES:
patent: 4004254 (1977-01-01), Devries
patent: 4096455 (1978-06-01), Drummond
patent: 4146851 (1979-03-01), Dempsey et al.
patent: 4263569 (1981-04-01), Moellmer

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