Distributed balun with a non-unity impedance ratio

Details Distributed balun with a non-unity impedance ratio Distributed balun with a non-unity impedance ratio

2007-04-03

2007-04-03

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

C333S026000, C336S200000

Reexamination Certificate

active

10981881

ABSTRACT:
A mode-switching transformer having a first conductive line formed of two primary windings electrically in series, and the length of which is a function of a central operating frequency of the transformer; and a second conductive line formed of two secondary windings electrically in series, coupled two-by-two with the primary windings, the length of which is a function of said central frequency. The conductive lines exhibit different widths selected according to the desired impedance ratio of the transformer.

REFERENCES:
patent: 5451914 (1995-09-01), Stengel
patent: 5477204 (1995-12-01), Li
patent: 5497137 (1996-03-01), Fujiki
patent: 6097273 (2000-08-01), Frye et al.
patent: 6927662 (2005-08-01), Kahlmann et al.
French Search Report from corresponding French Application No. 03/50813, filed Nov. 7, 2003.
Patent Abstracts o Japan, vol. 2002, No. 06, Jun. 4, 2002 & JP 2002 050910 A (Taiyo Yuden Co. Ltd.), Feb. 15, 2002.

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