Laminated balun transformer

Details Laminated balun transformer Laminated balun transformer

2007-02-27

2007-02-27

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S025000, C336S200000

Reexamination Certificate

active

11065232

ABSTRACT:
A laminated balun transformer subminiaturized with a transmission line length reduced below λ/4 without any variation of characteristics. The laminated balun transformer includes a first strip line having one end inputted to a unbalanced signal; a second strip line having connected to the first strip line; a third strip line formed in parallel with the first strip line and connected to a ground and connected to the external electrode for a first balanced signal; a fourth strip line formed in parallel with the second strip line and connected to the external electrode for a ground and the external electrode for a second balanced signal; and a capacitance forming electrode formed in parallel with a portion of the opened end of the second strip line and connected to the external electrode for the unbalanced signal.

REFERENCES:
patent: 6483415 (2002-11-01), Tang
patent: 6768410 (2004-07-01), Yazaki et al.
patent: 6954116 (2005-10-01), Nosaka

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