Finite-Difference Time-Domain Simulation of Arbitrary Impedance using One Port S-Parameter

Authors

  • Joshua M. Kast Department of Electrical Engineering Colorado School of Mines, Golden, CO 80401, USA
  • Atef Z. Elsherbeni Department of Electrical Engineering Colorado School of Mines, Golden, CO 80401, USA

Keywords:

Circuit analysis, computational electromagnetics, fast Fourier transform, finitedifference time-domain (FDTD), linear lumped circuit, scattering parameters, stripline circuit

Abstract

Many modern radio-frequency devices comprise both lumped-element components and complex geometries. Simulation of such a device requires modeling the electromagnetic interactions with both geometric features and lumped components. We present a method for including arbitrary lumped-element components into finite-difference time-domain (FDTD) simulations. The lumped-element components, which are described by their scattering parameters, are modeled in the Yee grid as dependent voltage sources. The mathematical formulation is described, along with its implementation into a FDTD simulator. For verification, simulation results of resistive, capacitive, and inductive loads are presented, and are compared to simulation results from previous lumped-element FDTD methods. This represents a first-step in modeling multiport networks described by their scattering parameters.

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Author Biographies

Joshua M. Kast, Department of Electrical Engineering Colorado School of Mines, Golden, CO 80401, USA

Joshua M. Kast is a Ph.D. candidate at Colorado School of Mines, Department of Electrical Engineering. He received his Bachelor of Science degree in Chemistry, and Master of Science degree in Electrical Engineering in 2011 and 2017 respectively, both from Colorado School of Mines. His current areas of research include computational electromagnetics with emphasis on the finite-difference time-domain method, and measurement of nonlinear microwave devices.

Atef Z. Elsherbeni , Department of Electrical Engineering Colorado School of Mines, Golden, CO 80401, USA

Atef Z. Elsherbeni received an honor B.Sc. degree in Electronics and Communications, an honor B.Sc. degree in Applied Physics, and a M.Eng. degree in Electrical Engineering, all from Cairo University, Cairo, Egypt, in 1976, 1979, and 1982, respectively, and a Ph.D. degree in Electrical Engineering from Manitoba University, Winnipeg, Manitoba, Canada, in 1987. He started his engineering career as a part time Software and System Design Engineer from March 1980 to December 1982 at the Automated Data System Center, Cairo, Egypt. From January to August 1987, he was a PostDoctoral Fellow at Manitoba University. Elsherbeni joined the faculty at the University of Mississippi in August 1987 as an Assistant Professor of Electrical Engineering. He advanced to the rank of Associate Professor in July 1991, and to the rank of Professor in July 1997. He was the Associate Dean of the college of Engineering for Research and Graduate Programs from July 2009 to July 2013 at the University of Mississippi. He then joined the Electrical Engineering and Computer Science (EECS) Department at Colorado School of Mines in August 2013 as the Dobelman Distinguished Chair Professor. He was appointed the Interim Department Head for (EECS) from 2015 to 2016 and from 2016 to 2018 he was the Electrical Engineering Department Head. In 2009 he was selected as Finland Distinguished Professor by the Academy of Finland and TEKES. Elsherbeni is a Fellow member of IEEE and ACES. He is the Editor-in-Chief for ACES Journal, and a past Associate Editor to the Radio Science Journal. He was the Chair of the Engineering and Physics Division of the Mississippi Academy of Science, the Chair of the Educational Activity Committee for IEEE Region 3 Section, the general Chair for the 2014 APS-URSI Symposium, the president of ACES Society from 2013 to 2015, and the IEEE Antennas and Propagation Society (APS) Distinguished Lecturer for 2020-2022.

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Published

2020-09-01

How to Cite

[1]
Joshua M. Kast and Atef Z. Elsherbeni, “Finite-Difference Time-Domain Simulation of Arbitrary Impedance using One Port S-Parameter”, ACES Journal, vol. 35, no. 9, pp. 985–991, Sep. 2020.

Issue

2020: Vol 35 Iss 9

Section

Articles