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The analysis of general two-dimensional PEC structures using a modified CPFDTD algorithm

Research output: Contribution to journalArticle

  • CJ Railton
  • JB Schneider
Original languageEnglish
Article number10
Pages (from-to)1728 - 1733
JournalIEEE Transactions on Microwave Theory and Techniques
Journal issue10, part 1
StatePublished - Oct 1996


The use of the contour path finite difference time domain (CPFDTD) method with locally distorted contours has been shown to give accurate results for curved metal structures. However, the numerical stability of this scheme is not guaranteed and significant skill is required in order to generate an appropriate grid. In this contribution, we present a modification to the CPFDTD scheme which ensures stability and give a step-by-step procedure for simple generation of the distorted grid. Examples are presented to demonstrate that the modified scheme yields results superior to those obtained using the standard staircased finite difference time domain (FDTD) approach. Example geometries are cylindrical cavities having complex cross-sections with smooth surfaces and right-angle bends. The accuracy of the method is demonstrated by comparison to analytical results where available

Additional information

Rose publication type: Journal article Sponsorship: The authors at the University of Bristol wish to thank Prof. J. McGeehan for the provision of facilities at the Centre for Communications Research. Terms of use: Copyright © 1998 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.

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