Analysis of Frequency-Dependent Transmission Lines Using Rational Approximation and Recursive Convolution

  • Wendemagegnehu T. Beyene
  • José E. Schutt-Ainé


In this study, we present an accurate and efficient analysis technique of frequency-dependent transmission line system using scattering parameters. First, low-order rational approximations of the scattering parameters are derived over a wide frequency range using robust interpolation technique. An appropriate reference system is also chosen to make the scattering waveforms smooth and simple. Then, the low-order rational approximations of the scattering parameters are directly implemented in conventional time-domain simulator using recursive convolution. To validate the accuracy and the efficiency of the method, the transient analyses of a coaxial cable with skin-effect parameters and an interconnect network with a component characterized by measured scattering parameters are presented.


Transmission Line Rational Approximation Scatter Parameter Reference Impedance Lossless Transmission Line 
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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Wendemagegnehu T. Beyene
    • 1
  • José E. Schutt-Ainé
    • 2
  1. 1.Hewlett-Packard CompanyWestlakeUSA
  2. 2.University of IllinoisUrbanaUSA

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