Invention Grant
- Patent Title: Thin film balun
- Patent Title (中): 薄膜平衡不平衡转换器
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Application No.: US12823450Application Date: 2010-06-25
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Publication No.: US08648667B2Publication 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

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.
Public/Granted literature
- US20110012690A1 THIN FILM BALUN Public/Granted day:2011-01-20
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