The dielectric relaxation study of tert-Butyl alcohol[TB] with ethylene glycol[EG] were determined in the frequency range of 10 MHz to 20 GHz using time domain reflectometry (TDR) in the temperature range 25oC and 35oC for 11 different concentrations of the system. The dielectric parameters viz. static dielectric constant(e0), dielectric constant at infinite frequency(e∞) and relaxation time (t) have been obtained by the least squares fit method. The Kirkwood correlation factor of the mixtures have also been determined. For temperature range, considered here, the permittivity increases and relaxation time decreases with the percentage of ethylene glycol [EG]. The static dielectric constants for the mixtures have been fitted with the modified Bruggeman model.
