Christine C. Dantas, Mirabel. C. Rezende,and Simone S. Pinto
We describe a method of extrapolation based on a “truncated” Kramers-Kronig relation for the complex permittivity (\epsilon) and permeability (μ) parameters of a material, based on finite frequency data. Considering a few assumptions, such as the behavior of the loss tangent and the overall nature of corrections, the method is robust to within a few % of relative error, if the assumed hypotheses hold at the extrapolated frequency range.
Permeability, Kromers-Kronig relations, loss tangent.
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