公开(公告)号：US20150270824A1

公开(公告)日：2015-09-24

申请号：US14434370

申请日：2013-11-06

申请人： EPCOS AG

发明人： Wolfgang Sauer ,  Thomas Kauschke ,  Thomas Bauer

IPC分类号： H03H9/02 ,  H03H3/02 ,  H03H3/08 ,  H03H9/25

CPC分类号： H03H9/02905 ,  H03H3/02 ,  H03H3/08 ,  H03H9/02559 ,  H03H9/02818 ,  H03H9/14541 ,  H03H9/25 ,  H03H9/725 ,  Y10T29/42

摘要： An electroacoustic component is specified in which the disturbing contributions of undesired wave modes are reduced. For this purpose, a component comprises includes a piezo layer, an electrode layer and a separating layer. A main mode and a secondary mode are capable of propagation in the component. The separating layer has an opposite thickness dependence for the frequencies of the main mode and of the secondary mode.

摘要翻译： 规定了一种电声分量，其中不期望的波模的干扰贡献减小。 为此，组件包括压电层，电极层和分离层。 主模式和次模式能够在组件中传播。 分离层对于主模式和次模式的频率具有相反的厚度依赖性。

公开(公告)号：US20160126928A1

公开(公告)日：2016-05-05

申请号：US14979287

申请日：2015-12-22

申请人： EPCOS AG

发明人： Werner Ruile ,  Markus Mayer ,  Ulrike Rösler ,  Markus Hauser ,  Ingo Bleyl ,  Karl-Christian Wagner ,  Wolfgang Sauer ,  Michael Jakob ,  Thomas Ebner ,  Edgar Schmidhammer ,  Stefan Berek ,  Christoph Eggs

IPC分类号： H03H9/25

CPC分类号： H03H9/25 ,  H03H3/08 ,  H03H9/02535 ,  H03H9/02858 ,  H03H9/14532 ,  H03H9/1455 ,  H03H9/1457 ,  Y10T29/42

摘要： 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.