NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.
Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
An Equivalent Transmission Line Model Containing Dispersion for High Speed Digital Lines
Published
Author(s)
Alberto Scarlatti, Christopher L. Holloway
Abstract
The increase in processor speeds in the last few years has created a growing need for the accurate characterization of waveform propagation on lossy printed circuit board (PCB) transmission lines. In 1980, Gumerova, Efimov and Kostenko introduced an equivalent circuit model for analyzing low-frequency propagation of atmospheric discharge on a transmission line over a lossy ground. The present paper will show how this equivalent transmission line model can be used to analyze dispersive transmission lines for high speed digital applications. The equivalent circuit elements of this transmission line model incorporate the frequency dependence of the impedance and admittance per unit length of the transmission line caused by the finite conductivity of the conductors as well as the dielectric losses. We will show that these equivalent circuit elements are such that they are well suited fro easy implementation into finite-difference time-domain (FDTD) transmission line models. Such an FDTD implementation will be presented. S-parameters and pulsed wave-forms for a circular wire, coplanar waveguides (CPW), and microstrip lines are shown.
Citation
IEEE Transactions on Electromagnetic Compatibility
Volume
43
Issue
4
Pub Type
Journals
Keywords
equivalent transmission line, high speed digital lines, dispersion
Scarlatti, A.
and Holloway, C.
(2001),
An Equivalent Transmission Line Model Containing Dispersion for High Speed Digital Lines, IEEE Transactions on Electromagnetic Compatibility
(Accessed October 8, 2025)