Presentation	2011-09-12 Theoretical Consideration of Unsymmetry for Balanced Circuits Yoshikazu FUJISHIRO, Kohji KOSHIJI,
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Abstract(in English)	Mixed-mode S-parameter is one of the evaluation parameter of unsymmetry for balanced circuits. We clearly indicate that the off-diagonal term S_ and LCL in ITU-T recommendation are in the relation of LCL=-20log|S_|. And as an example, we theoretically derive the mixed-mode S-parameters of a slightly-unsymmetrical coupled transmission line. The approximate expression shows that the off-diagonal term is larger as the symmetry is worse. And in case of electrically short and high characteristic impedance, we confirm that it is reduced to the expression of the lumped common mode filter.
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Keyword(in English)	Unsymmetry / Mixed-mode S-parameter / LCL / Coupled transmission line / Common mode filter
Paper #	EMCJ2011-78
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Committee	EMCJ
Conference Date	2011/9/5(1days)
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Paper Information
Registration To	Electromagnetic Compatibility (EMCJ)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	Theoretical Consideration of Unsymmetry for Balanced Circuits
Sub Title (in English)
Keyword(1)	Unsymmetry
Keyword(2)	Mixed-mode S-parameter
Keyword(3)	LCL
Keyword(4)	Coupled transmission line
Keyword(5)	Common mode filter
1st Author's Name	Yoshikazu FUJISHIRO
1st Author's Affiliation	Faculty of Science and Technology, Tokyo University of Science()
2nd Author's Name	Kohji KOSHIJI
2nd Author's Affiliation	Faculty of Science and Technology, Tokyo University of Science
Date	2011-09-12
Paper #	EMCJ2011-78
Volume (vol)	vol.111
Number (no)	205
Page	pp.pp.-
#Pages	6
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