A universal model for lossy and dispersive transmission lines for time domain CAD of circuits

Author

Alonso, José I. ; Borja, José ; Pérez, Félix

Author_Institution

Dpto. de Senales, Sistemas y Radiocommunicaciones, Univ. Politecnica, Madrid, Spain

Volume

40

Issue

5

fYear

1992

fDate

5/1/1992 12:00:00 AM

Firstpage

938

Lastpage

947

Abstract

Branin´s method of characteristics has been extended to obtain a universal equivalent model for lossy and dispersive transmission lines. Existing CAD software packages, such as SPICE, can be used for this implementation. The starting point for obtaining the model is the analog filters that approximate the characteristic impedance Z₀(s) and the propagation function F(s)=exp(-γl) of the transmission line. The circuits are synthesized using conventional network synthesis techniques. An examination of the validity of the model is carried out by analyzing an example of RLCG lines driven by bipolar logic gates and the distortion of a DC Gaussian pulse as it propagates along a microstrip line

Keywords

circuit CAD; distributed parameter networks; linear network synthesis; time-domain analysis; transmission line theory; DC Gaussian pulse; RLCG lines; SPICE; bipolar logic gates; characteristic impedance; computer aided design; dispersive transmission lines; lossy lines; microstrip line; network synthesis techniques; propagation function; time domain CAD; universal equivalent model; Circuit synthesis; Dispersion; Distributed parameter circuits; Filters; Impedance; Network synthesis; Propagation losses; SPICE; Software packages; Transmission lines;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.137401

Filename

137401