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Analysis of structures containing sharp oblique metal edges in FDTD using MAMPs

Research output: Contribution to journalArticle

  • CJ Railton
  • DL Paul
Original languageEnglish
Pages (from-to)2954 - 2960
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Journal issue9
StatePublished - Sep 2010


Previous enhancements to the finite difference time domain method have facilitated the analysis of structures such as those containing sharp metal edges which are aligned with the mesh or of smoothly curved metal objects. So far, however, there has been little work on the often encountered situation of thin metal edges which are inclined at an angle to the mesh other than for the special case of diagonal orientation. In this paper, the general case is examined and it is shown that the concept of modified assigned material parameters (MAMPs) can be extended to provide an effective and accurate means of treating this problem. Results are presented for curved microstrip patches, arbitrarily inclined rectangular microstrip patches and for the more complex case of a coplanar fed bow tie slot antenna.

Additional information

Publisher: IEEE Rose publication type: Journal article Terms of use: Copyright © 2010 IEEE. Reprinted from IEEE Transactions on Antennas and Propagation. 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

  • edges, finite difference time domain (FDTD), modified assigned material parameters (MAMPs), singularities

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