Patent · US Active

Electroacoustic transducer with reduced losses due to transverse emission and improved performance due to suppression of transverse modes

US9391256B2 · kind B2 · utility

1Cited by

6References

23Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Werner Ruile · Birkenfeld, DE
Markus Mayer · Taufkirchen, DE
Ulrike Rösler · Hebertshausen, DE
Markus Hauser · Feldafing, DE
Ingo Bleyl · Munich, DE
Gerd Riha · Munich, DE
Christoph Eggs · Rattenkirchen, DE

Key dates

Filing date	Dec 6, 2011
Grant date	Jul 12, 2016
Priority date	—
Expiry date	Apr 8, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/1457
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

The present invention relates to an electroacoustic transducer which is arranged in an acoustic track (AS) and on a piezoelectric substrate (11) and which has two electrodes (1, 2) which are arranged on the substrate (11) and which have interengaging electrode fingers (3, 4) for exciting acoustic waves. The electrode fingers (3, 4) of an electrode (1, 2) are interconnected. The transducer also has means for increasing the mass occupation in a central excitation region (ZAB) which runs parallel to the acoustic track (AS), and the mass occupation in the central excitation region (ZAB) is higher than in an edge region (RB) which adjoins the central excitation region (ZAB) from both sides.

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