Subgridding scheme for FDTD in cylindrical coordinates

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1 Scopus citations


A grid resolution compensation scheme based on subgridding is proposed and evaluated for improving the performance of the finite-difference time-domain method implemented in cylindrical coordinates. The scheme introduces subgrids into the domain with smaller azimuthal grid spacings. This work investigates interpolation methods used for estimating unknown but required field values at the interface between grids with different azimuthal grid spacings. It is found that cubic, cubic spline and trigonometric interpolation cause less than 1% error in estimating the frequencies of the propagating modes of a microstructured optical fiber. Multiple subgrids have the potential for significant domain size reduction and minimum time step enlargement.

Original languageEnglish
Title of host publicationPIERS 2011 Suzhou - Progress in Electromagnetics Research Symposium, Proceedings
Number of pages5
StatePublished - 2011
EventProgress in Electromagnetics Research Symposium, PIERS 2011 Suzhou - Suzhou, China
Duration: Sep 12 2011Sep 16 2011

Publication series

NameProgress in Electromagnetics Research Symposium
ISSN (Print)1559-9450


ConferenceProgress in Electromagnetics Research Symposium, PIERS 2011 Suzhou


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