Invention Grant
US08648667B2 Thin film balun 有权
薄膜平衡不平衡转换器

  • Patent Title: Thin film balun
  • Patent Title (中): 薄膜平衡不平衡转换器
  • Application No.: US12823450
    Application Date: 2010-06-25
  • Publication No.: US08648667B2
    Publication Date: 2014-02-11
  • Inventor: Makoto Endo
  • Applicant: Makoto Endo
  • Applicant Address: JP Tokyo
  • Assignee: TDK Corporation
  • Current Assignee: TDK Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Oliff & Berridge, PLC
  • Priority: JP2009-156239 20090630; JP2009-156241 20090630; JP2009-157726 20090702; JP2009-192593 20090821; JP2009-192594 20090821
  • Main IPC: H03H5/00
  • IPC: H03H5/00 H03H7/42
Thin film balun
Abstract:
A thin film balun that can be made smaller and thinner while maintaining required balun characteristics is provided. A thin film balun 1 includes: an unbalanced transmission line UL including a first coil portion C1 and a second coil portion C2; a balanced transmission line BL including a third coil portion C3 and a fourth coil portion C4 that are positioned facing and magnetically coupled to the first coil portion C1 and the second coil portion C2 respectively; an unbalanced terminal UT connected to the first coil portion C1; a ground terminal G connected to the second coil portion C2 via a C component D; and an electrode D2 connected to the ground terminal G and facing a part of the second coil portion C2. The C component D is formed by the electrode D2 and the part D1 of the second coil portion C2.
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