Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1995-03-15

1997-05-20

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310313D, H01L 4108

Patent

active

056315155

ABSTRACT:
A surface acoustic wave device is designed such that an inter-digital transducer and a reflector have the same grating cycle. The electrode dye width of the reflector is larger than that of the inter-digital transducer, or the electrode dye width is smaller than the distance between the electrodes by changing at least one of the inter-digital transducer and the reflector. Connecting the thus structured surface acoustic wave devices to a single piezoelectric substrate as resonators in a ladder form produces a surface acoustic wave device for use in a filter.

REFERENCES:
patent: 4097825 (1978-06-01), Gerard
patent: 4635009 (1987-01-01), Ebata
patent: 4837476 (1989-06-01), Mochizuki
patent: 5061871 (1991-10-01), Wright
patent: 5264751 (1993-11-01), Dufilie et al.
patent: 5406159 (1995-04-01), Wright
patent: 5485052 (1996-01-01), Seki et al.

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