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IEEE Transactions on Antennas and Propagation
Volume 48 Number 8, August 2000

Table of Contents for this issue

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The Problem and Treatment of DC Offsets in FDTD Simulations

Cynthia M. Furse, Senior Member, IEEE Daniel H. Roper, Dale N. Buechler, Member, IEEE Douglas A. Christensen and Carl H. Durney Fellow, IEEE

Page 1198.

Abstract:

This paper discusses the causes of and some solutions to the commonly observed problem of dc field offsets in finite-difference time-domain (FDTD) simulations. DC electric and magnetic field offsets are shown to be valid calculated responses of the modeled systems, resulting from interaction between the turn-on characteristics of the source and the properties of the models. The dc offsets may be avoided in the time domain by tailoring the source waveforms or in the frequency domain by post-processing the FDTD output.

References

  1. A. Taflove, Computational Electrodynamics: The Finite-Difference Time-Domain Method, Boston, MA: Artech House, 1995.
  2. C. M. Furse, S. P. Mathur and O. P. Gandhi, "Improvements to the finite-difference time-domain method for calculating the radar cross section of a perfectly conducting target", IEEE Trans. Microwave Theory Tech., vol. 38, pp.  919-927, 1990.