Surface acoustic wave element

Details Surface acoustic wave element Surface acoustic wave element

2008-01-22

2008-01-22

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C310S31300R

Reexamination Certificate

active

11185992

ABSTRACT:
A surface acoustic wave element includes a pair of interdigital transducers arranged in parallel with a propagation direction of a surface acoustic wave; a reflector prepared at both sides of the interdigital transducers; and a coupling portion, which mutually couples one end of a plurality of electrode fingers constituting one electrode portion of each interdigital transducer to be in common, wherein each of the electrode fingers includes a plurality of straight line portions that intersect with the coupling portion, and a bending portion prepared between these straight line portions.

REFERENCES:
patent: 4081769 (1978-03-01), Shreve
patent: 6384698 (2002-05-01), Hayashi
patent: 7038560 (2006-05-01), Yoneya
patent: 7138890 (2006-11-01), Nakamura et al.
patent: 60-43912 (1985-03-01), None
patent: 11-17493 (1999-01-01), None
patent: WO00-67374 (2000-09-01), None
Communication from European Patent Office re: related application, dated Aug. 2005.

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