NDLI: An Improved Thin Wire Representation for FDTD Computations

Content Provider	IEEE Xplore Digital Library
Author	Taniguchi, Y. Baba, Y. Nagaoka, N. Ametani, A.
Copyright Year	1963
Abstract	We have shown that finite-difference time-domain (FDTD) electromagnetic computations for a conductor system having a radius smaller than 0.15Deltar or larger than 0.65 Deltar (Deltar is the lateral side length of cells employed), modeled using arbitrary-radius-wire representations proposed so far with a time increment determined from the upper limit of Courant's stability condition, result in numerical instability. A primary factor causing this numerical instability is that the speed of waves propagating in the radial direction from the wire in the immediate vicinity of the wire exceeds the speed of light, and therefore, Courant's condition is not satisfied there. It is further shown that for these cases, the arbitrary-radius-wire representation can be improved by modifying the material parameters for the axial field components closest to the wire as well as those for the radial electric and circulating magnetic field components. The improved wire representation is effective in representing a wire whose radius ranges from 0.0001Deltar to 0.9Deltar.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	3248
Ending Page	3252
Page Count	5
File Size	424426
File Format	PDF
ISSN	0018926X
Volume Number	56
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wire Finite difference methods Time domain analysis Conductors Magnetic fields Transient analysis Stability Magnetic materials Telecommunication computing Electromagnetic modeling wire Electromagnetic fields finite-difference time-domain (FDTD) methods transient analysis
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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