Thin film balun

Details Thin film balun Thin film balun

2011-05-24

2011-05-24

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S246000

Reexamination Certificate

active

07948331

ABSTRACT:
There is provided a thin film balun which, while incorporating a capacitor used to supply a DC bias, allows improvement of various required characteristics. A thin film balun according to the present embodiment includes: an unbalanced transmission line which includes two first coils; a balanced transmission line which includes two second coils and which magnetically couples with the unbalanced transmission line; a capacitor having one end connected to the balanced transmission line; and a ground terminal connected to the other end of the capacitor. The capacitor is disposed to have a region which does not overlap a part of coil openings defined by the first coils and the second coils.

REFERENCES:
patent: 6396362 (2002-05-01), Mourant et al.
patent: 6768410 (2004-07-01), Yazaki et al.
patent: 7629860 (2009-12-01), Liu et al.
patent: 2010/0045396 (2010-02-01), Endo
patent: 2010/0045401 (2010-02-01), Endo
patent: 2010/0164643 (2010-07-01), Endo
patent: 2010/0164644 (2010-07-01), Endo
patent: 2011/0012690 (2011-01-01), Endo
patent: 3780414 (2006-05-01), None

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