Acoustic wave device

Details Acoustic wave device Acoustic wave device

2009-04-23

2010-06-29

Lee, Benny (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S195000

Reexamination Certificate

active

07746199

ABSTRACT:
An acoustic wave device includes first and second 3-IDT acoustic wave filters provided on a piezoelectric substrate. A second IDT in the first acoustic wave filter is electrically connected to a second IDT in the second acoustic wave filter and a third IDT in the first acoustic wave filter is electrically connected to a third IDT in the second acoustic wave filter to cascade the first acoustic wave filter with the second acoustic wave filter. An acoustic wave resonator is connected to a first IDT in the first acoustic wave filter. In the acoustic wave device, NA/NB is in a range from about 2.6 to about 3.5 and fB/fa is in a range from about 0.995 to about 1.010.

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Official Communication issued in International Patent Application No. PCT/JP2007/072933, mailed on Mar. 18, 2008.

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