Dielectric relaxation in time domain reflectometry (TDR)

Abstract

A polar dielectric effect is characterized by a spectrum of relaxation which follows Debye's model when the relaxation time is slightly distributed generally the polar aspect appears through the frequency measurement of the dielectric permittivity of which the real part interprets dispersion and the imaginary part interprets the absorption. We propose a process which allows the instantaneous description of polar dielectric material without conductivity or with a poor conductivity. Sample under test excited by a level of tension answers by another level of tension which is a temporal response.