Saw device with continous finger pattern

Details Saw device with continous finger pattern Saw device with continous finger pattern

H - Electricity

01

L

349/59.1

H01L 41/08 (2006.01)

Patent

CA 1277413

SAW DEVICE WITH CONTINUOUS FINGER PATTERN Abstract of the Disclosure A SAW device includes aligned IDTs (inter-digital transducers) with a continuous pattern of fingers between their front edges. Each IDT may be symmetrical about its center, and includes front and back edge reflection suppressing regions of fingers of successively decreasing length, which serve to suppress surface acoustic wave reflections at the respective edges. Optional shield regions between the two front edge suppressing regions, and between the back edge suppressing regions and acoustic absorbers, include fingers of successively increasing length complementary to and adjacent the fingers of successively decreasing length of the reflection suppressing regions. The IDTs may be apodized or unapodized, and each IDT may include dummy fingers between its active region and each reflection suppressing region.

522629

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