Surface acoustic wave gratings having selected reflectivity

Details Surface acoustic wave gratings having selected reflectivity Surface acoustic wave gratings having selected reflectivity

1993-11-11

1995-04-11

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

054061598

ABSTRACT:
An improved surface acoustic wave grating structure that utilizes four electrodes per 3.lambda./2 or 5.lambda./2 transduction length of a reflector grating structure that produces a desired net internal distributed reflectivity in both magnitude and phase.

REFERENCES:
patent: 4155056 (1979-05-01), Crass et al.
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patent: 4485364 (1984-11-01), DeVries
patent: 4661738 (1987-04-01), Skeie
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patent: 5061871 (1991-10-01), Wright
patent: 5073763 (1991-12-01), Wright
patent: 5103324 (1992-04-01), Brandstetter
patent: 5289073 (1994-02-01), Mariani
patent: 5306978 (1994-04-01), Yamanouchi et al.

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