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Local Approximation Based Material Averaging Approach in the Finite Integration Technique

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3 Author(s)
Classen, C. ; FG Theor. Elektrotech., Tech. Univ. Berlin, Berlin, Germany ; Bandlow, B. ; Schuhmann, R.

The a priori known field behavior in the vicinity of simple, not grid conformal geometrical shapes is used to derive new approaches for the material averaging in the two-dimensional Finite Integration Technique. The problem of wave scattering at dielectric cylinders is investigated and the resulting absolute errors are well below the common facet-weighted averaging procedures. A mixed approach using normal and tangential field components separately is investigated. The reduced errors are presented and discussed for different permittivity contrasts.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 2 )