Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

2005-06-28

2005-06-28

Chang, Daniel (Department: 2819)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S193000, C310S31300R

Reexamination Certificate

active

06911881

ABSTRACT:
A surface acoustic wave device has first and second surface acoustic wave filter elements which are arranged on a surface acoustic wave substrate so as to define a filter device having a two-stage configuration. A free surface portion is provided by forming a perforation in an inter-stage connecting portion connecting the first and second surface acoustic wave filter elements.

REFERENCES:
patent: 4468642 (1984-08-01), Hikita
patent: 5202652 (1993-04-01), Tabuchi et al.
patent: 6121860 (2000-09-01), Tsutsumi et al.
patent: 63-12930 (1988-01-01), None
patent: 02-075217 (1990-03-01), None
patent: 05-102783 (1993-04-01), None
patent: 07-066678 (1995-03-01), None
patent: 10-190404 (1998-07-01), None

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