Surface acoustic wave resonator, surface acoustic wave...

Details Surface acoustic wave resonator, surface acoustic wave... Surface acoustic wave resonator, surface acoustic wave...

2009-10-21

2011-12-27

Dougherty, Thomas M (Department: 2837)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C310S31300R, C310S360000

Reexamination Certificate

active

08084917

ABSTRACT:
A surface acoustic wave resonator includes a piezoelectric substrate and an interdigital transducer (IDT) that includes electrode fingers exciting a surface acoustic wave on the piezoelectric substrate, a first region at a center of the IDT, and a second region and a third region at opposite sides of the IDT. In the IDT, a line occupation rate at which an electromechanical coupling coefficient becomes a maximum is different from the line occupation rate at which reflection of the surface acoustic wave becomes a maximum.

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