Stabilised CPFDTD algorithm for the analysis of arbitrary 3D PEC structures

CJ Railton, IJ Craddock

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)


The use of the contour path finite difference time domain (CPFDTD) method with locally distorted contours is well known to give accurate results for curved metal structures. The numerical stability of this scheme is, however, not guaranteed and this can pose problems, especially in the analysis of closed resonant structures. In addition, the generation of the distorted mesh is itself not a trivial task. we present a modification to the three-dimensional scheme which, without sacrificing accuracy renders it numerically stable, robust and easy to generate. A step-by-step procedure is given whereby the distorted mesh can be automatically generated for any desired metal structure. The accuracy of the modified scheme is demonstrated for the analysis of a circular cylindrical resonant cavity which is tilted with respect to the Cartesian FDTD mesh
Original languageEnglish
Pages (from-to)367 - 372
JournalIEE Proceedings - Microwaves, Antennas and Propagation
Issue number5
Publication statusPublished - Oct 1996

Bibliographical note

Sponsorship: The authors wish to thank Professor Joe McGeehan for the provision of facilities at the Centre for Communications Research

Publisher: Institution of Electrical Engineers (IEE)


  • metal structures
  • contour path finite difference time domain method


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