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Transient analysis of the EM field coupling to multi-conductor transmission lines using the NILT method

Published online by Cambridge University Press:  15 March 2012

Adnen Rajhi ,
Said Ghnimi  and
Ali Gharssallah
Adnen Rajhi*
Affiliation:
Ecole Supérieure de Technologie et de l'Informatique, Université de Carthage, Tunisie. Phone: +216 98 915 906
Said Ghnimi
Affiliation:
Unité de recherche Circuits et Systèmes Electroniques hautes fréquences, Faculté des Sciences de Tunis, Université Elmanar, Tunisie.
Ali Gharssallah
Affiliation:
Unité de recherche Circuits et Systèmes Electroniques hautes fréquences, Faculté des Sciences de Tunis, Université Elmanar, Tunisie.
*
Corresponding author: A. Rajhi Email: adnen.rajhi@esti.rnu.tn
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Abstract

A simple and efficient numerical inversion Laplace transform (NILT) algorithm is implemented in MATLAB environment based on the quotient difference method to solve the problem of electromagnetic (EM) field coupling to lossy or lossless multi-conductor transmission lines (MTL) illuminated by an EM incident field. Two major points are treated in this work for the lossy MTL system excited by an incident EM field; the first one is the optimum equivalent circuit taking into consideration the different physical concepts based on the transmission line theory and the second point deals with the choice and implementation of the numerical method for less computing time and for efficient results. In this paper, the effect of the EM coupling is treated and it is based on the superposition effect of each distributed voltage current sources using the NILT numerical method. Results of the near end and far end voltages and currents for an MTL system are presented and displayed for two types of microwave (MW) structures in the time domain for the case of a plane wave excitation. It has been shown that a non-homogeneous MW structure or multilayered system with a specific choice of the dielectric constant has an advantage for less transient EM coupling due to the external EM field.

Keywords

Numerical inversion Laplace transformMulti-conductor transmission linesEM couplingHomogeneous and non-homogeneous structures
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 4 , Issue 4 , August 2012 , pp. 463 - 472
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2012

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