The treatment of geometrically small structures in FDTD by the modification of assigned material parameters

CJ Railton, DL Paul, IJ Craddock, GS Hilton

Research output: Contribution to journalArticle (Academic Journal)

28 Citations (Scopus)
333 Downloads (Pure)

Abstract

A number of different improvements to the analysis by finite-difference time-domain (FDTD) of small structures, such as wires, strips and slots have been proposed in the literature. One of these methods takes account of the fringing fields associated with metal edges and wires by empirically modifying the assigned material parameters in neighboring cells. In this contribution it is shown that, in many cases, it is possible to derive these modified assigned material parameters (MAMPs) analytically. In this form, the approach provides an alternative, and novel, way of incorporating Static Field Solutions into the FDTD method which has advantages of simplicity and robustness over existing techniques. Results are presented for a number of structures including wire transmission lines and a microstrip patch antenna.
Translated title of the contributionThe treatment of geometrically small structures in FDTD by the modification of assigned material parameters
Original languageEnglish
Article numberIssue 12
Pages (from-to)4129 - 4136
Number of pages8
JournalIEEE Transactions on Antennas and Propagation
Volume53
Issue number12
DOIs
Publication statusPublished - Dec 2005

Bibliographical note

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

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Keywords

  • finite difference time domain (FDTD) method
  • microstrip antennas
  • transmission line theory

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