Surface acoustic wave filter and communication device using...

Details Surface acoustic wave filter and communication device using... Surface acoustic wave filter and communication device using...

2005-02-08

2005-02-08

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S195000, C310S31300R

Reexamination Certificate

active

06853269

ABSTRACT:
A surface acoustic wave filter has a piezoelectric substrate; at least an input IDT electrode arranged on the piezoelectric substrate; and at least an output IDT electrode arranged on the plezoelectric substrate. A pitch of electrode fingers of the input IDT electrode and a pitch of electrode fingers of the output IDT electrode are different from each other.

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European Search Report for Application No. EP 02 01 5561 dated Sep. 25, 2002.

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