Surface acoustic wave filter element, surface acoustic wave...

Details Surface acoustic wave filter element, surface acoustic wave... Surface acoustic wave filter element, surface acoustic wave...

2006-07-11

2006-07-11

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S195000

Reexamination Certificate

active

07075391

ABSTRACT:
A surface acoustic wave filter element hasa piezoelectric substrate; anda plurality of inter-digital transducer (IDT) electrodes formed on the piezoelectric substrate,wherein at least one of the plurality of IDT electrodes is connected to a balanced type terminal and other IDT electrodes are connected to balanced type terminals or unbalanced type terminals, andfirst wiring electrode means which is connected or to be connected to the at least one IDT electrode and second wiring electrode means which is connected or to be connected to the other IDT electrodes are disposed on planes different from each other.

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“Transactions in 2001 on Foundation/Boundary Society Conference of Institute of Electronics, Information and Communication Engineers,” Institute of Electronics, Information and Communication Engineers, Aug. 29, 2001, pp. 283-284 (w/English translation).

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