Material Parameter Extraction in THz Domain, Simplifications and Sensitivity Analysis

Classic equations for material parameter extraction are reconsidered and slightly modified to achieve stable results at all frequencies. Meanwhile, closed-form solutions are developed to simplify the material parameter extraction process and uncertainty evaluation. The presented equations are independent of the material-slab thickness and therefore, can reduce the relevant systematic errors and uncertainties. Some representative results are reported in the frequency range 140-220 GHz together with the uncertainty analysis and sensitivity coefficients.