On the wideband EMI response of a rotationally symmetric permeable and conducting target

Lawrence Carin, Haitao Yu, Yacine Dalichaouch, Alexander R. Perry, Peter V. Czipott, Carl E. Baum

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A simple and accurate model is presented for computation of the electromagnetic induction (EMI) resonant frequencies of canonical conducting and ferrous targets, in particular, finite-length cylinders and rings. The imaginary resonant frequencies correspond to the well known exponential decay constants of interest for time-domain EMI interaction with conducting and ferrous targets. The results of the simple model are compared to data computed numerically, via method-of-moments (MoM) and finite-element models. Moreover, the simple model is used to fit measured wideband EMI data from ferrous cylindrical targets (in terms of a small number of parameters). It is also demonstrated that the general model for the magnetic-dipole magnetization, in terms of a frequency-dependent diagonal dyadic, is applicable to general rotationally symmetric targets (not just cylinders and rings).
Original languageEnglish (US)
Pages (from-to)1206-1213
Number of pages8
JournalIEEE Transactions on Geoscience and Remote Sensing
Issue number6
StatePublished - Jun 1 2001
Externally publishedYes

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