Patent ID: 7868717
Filing Date: 2011-01-11
Classification: H03H

Abstract:
1. A transducer operating with surface acoustic waves, comprising: 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; 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 areas; the peripheral areas are configured such that the longitudinal phase velocity v the outside areas configured such that the longitudinal phase velocity v the peripheral areas and outside areas are configured such that (k a width of the peripheral areas in the transversal direction is configured relative to a width of the excitation area such that k the width of the respective peripheral area in the transversal direction is between π/(4k