Surface acoustic wave (SAW) resonator, SAW filter and SAW...

Details Surface acoustic wave (SAW) resonator, SAW filter and SAW... Surface acoustic wave (SAW) resonator, SAW filter and SAW...

2006-04-25

2006-04-25

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S195000, C310S31300R

Reexamination Certificate

active

07034634

ABSTRACT:
A SAW resonator includes an IDT electrode formed on a piezoelectric substrate and reflector electrodes disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes, second finger-electrodes and strip-line electrodes. The first and the second finger-electrodes do not overlap with each other but are acoustically coupled together by the strip-line electrodes. This acoustic coupling by the strip-line electrodes eliminates the need for a common bus-bar electrode, so that the loss caused by the resistance of the common bus-bar electrode can be reduced, and the SAW resonator can be downsized.

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