Effect of Different Shapes on the Measurement of Dielectric Constants of Low-Loss Materials With Rectangular Waveguides at X-Band

G Yang, S Zhou, W Liang, X Li… - IEEE Microwave and …, 2022 - ieeexplore.ieee.org
To quantify the effect of air gap on the dielectric constant measurement of low-loss materials,
this letter presents the first quantitative study of the effect of five different shapes on the …

Contrast source inversion technique for the reconstruction of 3D inhomogeneous materials loaded in a rectangular waveguide

E Kılıç, F Akleman, A Yapar - Inverse problems, 2011 - iopscience.iop.org
An inverse scattering approach based on the contrast source inversion (CSI) algorithm is
presented for the determination of the three-dimensional (3D) complex permittivity variation …

Material characterization in partially filled waveguides using inverse scattering and multiple sample orientations

D Sjöberg, C Larsson - Radio Science, 2015 - ieeexplore.ieee.org
We present a method aimed at reducing uncertainties and instabilities when characterizing
materials in waveguide setups. The method is based on measuring the S parameters for …