Home > Articles > Published articles > Signal balancing in unbalanced transmission lines |
Date: | 2019 |
Abstract: | Balanced lines operating as transmission line interconnects are subjected to differential-mode to common-mode conversion (and vice versa) in situations where symmetry imbalances (e. g. , caused by line bends) are unavoidable. In this paper, a technique to compensate for such symmetry imbalances, providing pure differential-mode signals at the differential output port of the line, is presented. Such technique uses a rat-race balun (to generate the differential-mode signal) with the isolated port conveniently loaded, and it is based on the modification of the characteristic impedance of one of the unbalanced lines. A detailed analysis that justifies this compensation technique (valid for any arbitrary four-port network) and provides the design equations is presented. The approach is validated through simulation and experiment, by demonstrating that common-mode signals are not transmitted to the differential output port of a bended (i. e. , unbalanced) line pair. |
Grants: | Ministerio de Ciencia e Innovación IJCI-2017-31339 Ministerio de Economía y Competitividad TEC2016-75650-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2018/FI_B_00111 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1159 |
Rights: | Tots els drets reservats. |
Language: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Subject: | Balanced lines ; Common mode ; Differential mode ; Microstrip ; Rat-race coupler |
Published in: | IEEE transactions on microwave theory and techniques, Vol. 67, issue 8 (Aug. 2019) , p. 3339-3349, ISSN 0018-9480 |
Postprint 12 p, 1.4 MB |