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

US9257960B2 · kind B2 · utility

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
• Karl-Christian Wagner · Unterhaching, DE
• Wolfgang Sauer · Glückstadt, DE
• Michael Jakob · Birkenfeld, DE
• Thomas Ebner · Braunau am Inn, AT
• Edgar Schmidhammer · Stein an der Traun, DE
• Stefan Berek · Munich, DE
• Christoph Eggs · Rattenkirchen, DE

Key dates

• Filing date: Sep 15, 2010
• Grant date: Feb 9, 2016
• Expiry date: Jun 24, 2032

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

An electroacoustic transducer has reduced loss due to acoustic waves emitted in the transverse direction. For this purpose, a transducer comprises a central excitation area, inner edge areas flanking the central excitation area, outer edge areas flanking the inner edge areas, and areas of the busbar flanking the outer edge areas. The longitudinal speed of the areas can be set so that the excitation profile of a piston mode is obtained.