Acoustic wave transducer and filter comprising said transducer

Details Acoustic wave transducer and filter comprising said transducer Acoustic wave transducer and filter comprising said transducer

2011-01-11

2011-01-11

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Electromechanical filter

C333S194000, C333S195000, C310S31300R

Reexamination Certificate

active

07868717

ABSTRACT:
A transducer includes an acoustic track in which an acoustic wave can be propagated, the acoustic track having a transversal fundamental mode, the acoustic track being subdivided in a transversal direction into an excitation area and two peripheral areas. The transducer also includes a first outside area and a second outside area bordering the acoustic track such that the acoustic track is arranged in the transversal direction between the first and second outside area. The transducer also includes peripheral areas configured such that the longitudinal phase velocity vRBof the acoustic wave in the respective peripheral area is greater than the longitudinal phase velocity vMBof the wave in the excitation area.

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