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Optimization circuit model of a multiconductor transmission line

Published online by Cambridge University Press:  28 February 2014

Youssef Mejdoub*
Affiliation:
Department of Physics, Laboratory of Electrical Systems and Telecommunications, Faculty of Sciences and Technology, Cadi Ayyad University, P.O. Box 549/40000, Marrakech, Morocco. Phone: +212 6 66 61 34 55
Hicham Rouijaa
Affiliation:
Department of Physics, Laboratory of Electrical Systems and Telecommunications, Faculty of Sciences and Technology, Cadi Ayyad University, P.O. Box 549/40000, Marrakech, Morocco. Phone: +212 6 66 61 34 55 Department of Matter Sciences, Poly-disciplinary Faculty, Cadi Ayyad University, P.O. Box 4162/46000, Safi, Morocco
Abdelilah Ghammaz
Affiliation:
Department of Physics, Laboratory of Electrical Systems and Telecommunications, Faculty of Sciences and Technology, Cadi Ayyad University, P.O. Box 549/40000, Marrakech, Morocco. Phone: +212 6 66 61 34 55
*
Corresponding author: Y. Mejdoub Email: [email protected]

Abstract

This paper presents an optimization circuit model of multiconductor transmission lines in the time domain. Several methods allow calculation of the currents and the tensions distributed on the uniform transmission line. Most of these methods are limited to lines with constant losses, and only for linear loads. The macro-model we propose, using Pade approximant, employs more variables and allows it to reduce the necessary cells' number in modelization than the traditional cells cascade method. This macro-model, using the Modified Nodal Analysis method (MNA), is suitable for an inclusion in circuit simulator, such as Esacap, Spice, and Saber. The MNA method offers an efficient means to discretize transmission lines on real and complex cells compared to the conventional lumped discretization. In addition, the model can directly handle frequency-dependent line parameters in the time domain. An example, with experimental measures taken from literature, is presented to validate the model we propose, and show its importance. It is necessary for assuring the results validity obtained from Pade macro-model to study its stability and passivity.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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