Surface acoustic wave device and communication device

Details Surface acoustic wave device and communication device Surface acoustic wave device and communication device

2007-03-30

2009-08-25

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S193000, C333S195000, C310S31300R

Reexamination Certificate

active

07579928

ABSTRACT:
A surface acoustic wave device includes front stage and rear stage surface acoustic wave elements, a signal wiring connecting between the front stage and rear stage surface acoustic wave elements, a reference potential wiring connected with the rear stage surface acoustic wave element and a capacitor made of an insulator interposed between the signal wiring and the reference potential wiring. A surface acoustic wave device includes a front stage surface acoustic wave resonator, a rear stage surface acoustic wave element, a signal wiring connecting between the front stage surface acoustic wave resonator and the rear stage surface acoustic wave element, a reference potential wiring connected with the rear stage surface acoustic wave element and a capacitor made of an insulator interposed between the signal wiring and the reference potential wiring. A communication device includes the surface acoustic wave device described above, a receiver circuit or a transmitter circuit.

REFERENCES:
patent: 6744333 (2004-06-01), Sawada
patent: 6781485 (2004-08-01), Takamine et al.
patent: 2004/0189147 (2004-09-01), Ito et al.
patent: 2004/0196119 (2004-10-01), Shibahara et al.
patent: 2005/0116352 (2005-06-01), Warashina et al.
patent: 2006/0044081 (2006-03-01), Tanaka et al.
patent: 2007/0018756 (2007-01-01), Fujii et al.
patent: 11-097966 (1999-04-01), None
patent: 2002-084164 (2002-03-01), None
patent: WO 2006/009021 (2006-01-01), None

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