Modelling metallic discontinuities with the non-orthogonal finite difference time domain method

R Nilavalan, IJ Craddock, CJ Railton

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

1 Citation (Scopus)

Abstract

Numerical electromagnetic models, such as the finite difference time domain (FDTD) method, have many applications. The authors focus on the non-orthogonal FDTD method, which offers an improved geometric flexibility compared to other standard techniques. Results from numerical electromagnetic analysis methods, such as the FDTD method, are often degraded by an error known as numerical dispersion. For metallic structures this dispersion error is often higher than expected from theoretical considerations. The source of this additional error is due to the reciprocal field interpolation scheme used in the non-orthogonal FDTD algorithm. The error is illustrated by means of a microstrip waveguide and a microstrip antenna. Techniques for reducing this error are evaluated; careful construction of the mesh at the metallic boundary being the most reliable solution
Translated title of the contributionModelling metallic discontinuities with the non-orthogonal finite difference time domain method
Original languageEnglish
Article numberIssue 5
Pages (from-to)425 - 429
Number of pages5
JournalIEE Proceedings - Microwaves, Antennas and Propagation
Volume151
Issue number5
DOIs
Publication statusPublished - Oct 2004

Bibliographical note

Publisher: Institution of Electrical Engineers (IEE)
Rose publication type: Journal article

Sponsorship: The authors would like to thank Professors McGeehan and Bull for provision of facilities at the University of Bristol, and EPSRC for supporting this work

Keywords

  • finite difference time-domain analysis
  • microstrip antenna

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