J. Phys. III France
Volume 3, Number 3, March 1993
Page(s) 581 - 591
DOI: 10.1051/jp3:1993105
J. Phys. III France 3 (1993) 581-591

Time-domain analysis of dispersive transmission lines

Wojciech Gwarek1 and Malgorzata Celuch-Marcysiak2

1  LEST CNRS 1429 ; Dept. ELP, Ecole Nationale Supérieure de Télécommunications de Bretagne, B.P. 832, 29-285 Brest, France
2  Instytut Radioelektroniki, Politechnika Warszawska, 00-665 Warszawa, Nowowiejska 15/19, Poland

(Received 17 March 1992, revised 3 November 1992, accepted 6 November 1992)

We present and compare three time domain algorithms for calculating the dispersion characteristics of transmission lines of arbitrary cross-section : the 2-DV FD-TD, the Complex SCN TLM and the 2-DV SCN TLM proposed in this work. All the algorithms prove efficient, as a result of reducing the numerical analysis to two space dimensions. Their accuracy is demonstrated by means of comparison with the results obtained by other methods, for a range of practical examples of microwave guiding structures. We also introduce a new type of excitation which further improves the efficiency and reliability of the time-domain approach.

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