Balanced-unbalanced conversion element

Details Balanced-unbalanced conversion element Balanced-unbalanced conversion element

2011-01-25

2011-01-25

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S204000

Reexamination Certificate

active

07876172

ABSTRACT:
A balanced-unbalanced conversion element for realizing easy adjustment of a phase balance of two balanced signals is provided. The balanced-unbalanced conversion element includes a first ¼-wavelength resonant line coupled to a first balanced terminal, a second ¼-wavelength resonant line coupled to a second balanced terminal, and a ½-wavelength resonant line. The ½-wavelength resonant line includes a first open-end-side line coupled to an unbalanced terminal and the first ¼-wavelength resonator and a second open-end-side line coupled to the second ¼-wavelength resonator. In addition, a width of the first open-end-side line differs from a width of the second open-end-side line.

REFERENCES:
patent: 6150897 (2000-11-01), Nishikawa et al.
patent: 7567143 (2009-07-01), Mori et al.
patent: 2010/0090776 (2010-04-01), Mori et al.
patent: 10-290107 (1998-10-01), None
patent: 2004-350143 (2004-12-01), None
patent: WO 2008/041398 (2008-04-01), None
PCT/JP2008/059432 Written Opinion dated Jun. 5, 2008.

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