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Computing electromagnetic field distribution due to an arbitrary shape exciter near multilayer slab conductors

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4 Author(s)
Fatehi, H. ; Tech. Inspection Dept., Nat. Iranian Copper Ind. Co., Kerman, Iran ; Sadeghi, S.H.H. ; Fatehi, M. ; Moini, R.

We present a semianalytical method for calculating the electromagnetic field distribution in a multilayer slab conductor. This is a very advanced and comprehensive method because there is no limitation for the shape of the exciter and the number of layers (i.e., an exciter of any arbitrary shape and at any distance near the surface of a multilayer conductor with a large number of layers can be modeled). We solve the Helmholtz equation in three dimensions by separation of variables. We develop a two-dimensional fast Fourier transform (FFT) integral model and use exponential functions in the third dimension. We solve this integral model analytically and numerically by using the custom matrix form AX = B and a system of algebraic equations, respectively. To verify this method, we solve a simple example problem both by the new method and a finite-element method (FEM) program. The results are in good agreement with each other.

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Magnetics, IEEE Transactions on  (Volume:41 ,  Issue: 3 )