Invention Grant
US07728698B2 Surface acoustic wave resonator filter with longitudinally coupled transducers 有权
具有纵向耦合传感器的表面声波谐振器滤波器

  • Patent Title: Surface acoustic wave resonator filter with longitudinally coupled transducers
  • Patent Title (中): 具有纵向耦合传感器的表面声波谐振器滤波器
  • Application No.: US11587014
    Application Date: 2005-04-06
  • Publication No.: US07728698B2
    Publication Date: 2010-06-01
  • Inventor: Thomas Bauer
  • Applicant: Thomas Bauer
  • Applicant Address: DE Munich
  • Assignee: EPCOS AG
  • Current Assignee: EPCOS AG
  • Current Assignee Address: DE Munich
  • Agency: Fish & Richardson P.C.
  • Priority: DE102004020183 20040422
  • International Application: PCT/EP2005/003624 WO 20050406
  • International Announcement: WO2005/107065 WO 20051110
  • Main IPC: H03H9/64
  • IPC: H03H9/64
Surface acoustic wave resonator filter with longitudinally coupled transducers
Abstract:
A surface acoustic wave filter includes an acoustic track bounded by reflectors, at least a first input transducer and at least a second input transducer acoustically coupled to the acoustic track that are connected in parallel and connected to an asymmetric input port, at least two first output transducers acoustically coupled to the acoustic track that are connected in parallel and connected, to a first terminal of a symmetric output port and at least two second output transducers acoustically coupled to the acoustic track that are connected in parallel and connected to a second terminal of a symmetric output port. Each first output transducer in the acoustic track and corresponding second output transducers are side-by-side and are electrically connected in series via a first bus bar.
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