Balance-unbalance conversion element

Details Balance-unbalance conversion element Balance-unbalance 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

07876171

ABSTRACT:
A balance-unbalance conversion element that easily adjusts the phase balance between two balance signals. The balance-unbalance conversion element includes a dielectric substrate and an electrode pattern on a surface of the dielectric substrate. The electrode pattern includes a first ¼-wavelength resonance line coupled to a first balance terminal; a second ¼-wavelength resonance line coupled to a second balance terminal; a ½-wavelength resonance line having a first open end coupled to an unbalance terminal and the first ¼-wavelength resonator and a second open end coupled to the second ¼-wavelength resonator; and a balance characteristic adjustment electrode having a tip end opposed to a side of the ½-wavelength resonance line and a base end electrically coupled to a ground electrode. A center line of the electrode pattern on the surface of the dielectric substrate and the center of the tip end of the balance characteristic adjustment electrode are separated from each other.

REFERENCES:
patent: 6150897 (2000-11-01), Nishikawa et al.
patent: 7567143 (2009-07-01), Mori et al.
patent: 2008/0224796 (2008-09-01), Mori et al.
patent: 10-290107 (1998-10-01), None
patent: WO 2008/041398 (2008-04-01), None
PCT/JP2008/059430 Written Opinion dated Jun. 5, 2008.

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