Determination of Complex Permittivity and Permeability by a Gradient Matrix Method

구배행렬법에 의한 복소 유전율 및 투자율의 결정

A gradient matrix method in conjunction with the transmission-reflection method to determine the complex permittivity and permeability of a microwave material is presented. This method does not incur the phase ambiguity due to an improper sample length, and is applicable to the measurement of low-loss materials of a half wavelength. A gradient matrix for a coaxial cable sample is derived, and the results are illustrated.