公开(公告)号：US09614494B2

公开(公告)日：2017-04-04

申请号：US14763494

申请日：2013-03-15

申请人： EPCOS AG

发明人： Ralph Durner ,  Ravi Kiran Challa ,  Wolfgang Till ,  Aleh Loseu

IPC分类号： H03H7/38 ,  H03H9/205 ,  H03H9/02 ,  H03H9/54 ,  H03H9/60 ,  H03H9/64 ,  H01F38/14 ,  H03H9/70 ,  H03H9/72

CPC分类号： H03H9/205 ,  H01F38/14 ,  H01F2038/146 ,  H03H9/02015 ,  H03H9/02543 ,  H03H9/542 ,  H03H9/605 ,  H03H9/6483 ,  H03H9/706 ,  H03H9/725

摘要： A reactance filter includes a series branch that includes a number of series impedance elements that are coupled in series and a number of parallel branches each having a parallel impedance element coupled to a respective node of the series branch. Each impedance element includes a resonator that works with acoustic waves. The resonators in the series branch include a first piezoelectric material and the resonators in the parallel branches include a second piezoelectric material that is different than the first piezoelectric material.