The widely used finite difference time domain (FDTD) algorithm in its standard form is conditionally stable, the condition being the well-known Courant criterion. Much research has focussed on modifying the standard algorithm to improve its characterisation of geometrical detail and curved surfaces; these modified algorithms, however, may easily be conditionally stable - there is no value of time step that stabilizes the algorithm. The authors present a passive electrical circuit that, by virtue of its formal equivalence with FDTD, provides a criterion by which unconditionally unstable algorithms may be avoided. As an example the passive circuit criterion is used to remove the instability from a contour-path FDTD algorithm.
|Translated title of the contribution||Derivation and application of a passive equivalent circuit for the Finite Difference Time Domain algorithm|
|Pages (from-to)||40 - 42|
|Journal||IEEE MICROWAVE AND GUIDED WAVE LETTERS|
|Publication status||Published - Jan 1996|
Bibliographical noteRose publication type: Journal article
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- finite difference time-domain analysis
- FDTD algorithm