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An analytical and numerical analysis of several locally conformal FDTD schemes

Research output: Contribution to journalArticle

  • CJ Railton
  • JB Schneider
Original languageEnglish
Article number1
Pages (from-to)56 - 66
Number of pages11
JournalIEEE Transactions on Microwave Theory and Techniques
Journal issue1
StatePublished - Jan 1999


The virtues of the finite-difference time-domain (FDTD) method for the electromagnetic analysis of arbitrary complex metal and dielectric structures are well known. Almost equally well known are the difficulties encountered by the technique when the material boundaries do not coincide with the Cartesian mesh. Until recently, there were few alternatives to the simple, but inaccurate, staircase approximation for these cases. However, over the past few years, there have been several solutions proposed, which maintain the simplicity and efficiency of the FDTD method while providing an accurate treatment of curved, offset, or sloping metallic boundaries. In this paper, analytical and numerical comparisons are presented and a clear recommended method is shown to emerge

Additional information

Publisher: Institute of Electrical and Electronics Engineers, Inc. (IEEE0 Rose publication type: Journal article Terms of use: Copyright © 1999 IEEE. Reprinted from IEEE Transactions on Microwave Theory and Techniques. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • finite difference time domain methods (FDTD)

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