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Reliable Method for Material Characterisation using a Quasi-Optical Free-Space Measurement in the W-Band

This publication appears in: IET Science, Measurement & Technology

Authors: A. Elhawil, G. Koers, L. Zhang, J. Stiens and R. Vounckx

Volume: 3

Issue: 1

Pages: 39-50

Publication Date: Jan. 2009


Abstract:

This paper presents an extension to Nicolson, Ross and Weir (NRW) algorithm to retrieve the complex permittivity and permeability from both the reflection and transmission coefficients. This new numerical retrieval approach solves the phase ambiguity problem associated with the NRW algorithm. A free-space quasi-optical 2-port measurement setup is employed to obtain the scattering parameters of different samples in the W-band frequency range. The results of different samples with various thicknesses are presented. Advantages and limitations of the method are also discussed.

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rvounckx@etrovub.be

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