Patent · US Active

Acoustic wave transducer and filter comprising said transducer

US7868717B2 · kind B2 · utility

1Cited by

7References

25Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Markus Mayer · Taufkirchen, DE
Karl-Christian Wagner · Unterhaching, DE
Andreas Bergmann · Berlin, DE

Key dates

Filing date	Dec 18, 2006
Grant date	Jan 11, 2011
Priority date	—
Expiry date	Aug 28, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/1455
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

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 vRB of the acoustic wave in the respective peripheral area is greater than the longitudinal phase velocity vMB of the wave in the excitation area.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.