An algorithm for the treatment of curved metallic laminas in the finite difference time domain method

CJ Railton

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

8 Citations (Scopus)
377 Downloads (Pure)


The Finite Difference Time Domain (FDTD) method, implemented in Cartesian coordinates, is well proven as an efficient technique for the electromagnetic analysis of a wide variety of microwave structures. The standard FDTD method is, however, less efficient if the structure under investigation has boundaries which are not parallel to the coordinate axes. Techniques designed to overcome this problem such as locally or globally deformed grids, or the use of nonorthogonal coordinate systems have been reported but these impose a penalty in computational effort or in flexibility. In this contribution, an alternative technique is described whereby the standard Cartesian grid is maintained, and the existence of the material boundaries is accounted for by the use of special finite difference equations for the affected nodes. These equations take account not only of the position of the boundaries but also of the asymptotic field behavior in their vicinity. This technique results in a flexible, accurate, and efficient, implementation which is applicable to a wide range of MMIC and antenna structures
Translated title of the contributionAn algorithm for the treatment of curved metallic laminas in the FDTD method
Original languageEnglish
Pages (from-to)1429 - 1438
Number of pages9
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number8
Publication statusPublished - Aug 1993

Bibliographical note

Publisher: Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Rose publication type: Journal article

Sponsorship: The author wishes to thank Professor J.P. McGeehan, Director of the Centre for Communications Research, University
of Bristol for the provision of facilities.

Terms of use: Copyright © 1993 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

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