Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

H - Electricity

03

H

H03H 9/64 (2006.01)

Patent

CA 2182050

A surface acoustic wave device which not only is low-loss in a pass band and has high attenuation in an attenuation region but also has superior power- resistance and has a large reflection coefficient in a blocking region comprises a first one-port SAW resonator filter connected in parallel with a three-electrodevertically connected double mode SAW resonator filter. The first one-port SAW resonator filter is so constructed that its resonance frequency is outside the pass band of the vertically connected double mode SAW resonator filter on the low- frequency side thereof and a connection point between the double mode SAW resonator filter and the first one-port SAW resonator filter is provided to an input terminal.

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