10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 2 2013 (April - June) Dielectric relaxation measurements on Methanol – Dimethylaminoethanol solvent mixtures have been carried out across the entire concentration range using Time Domain Reflectometry technique at 15, 25, 35 and 45 lessThan sup greaterThan 0 lessThan /sup greaterThan C over the frequency range from 10 MHz to 20 GHz. The mixtures exhibit a principle dispersion of the Davidson-Cole relaxation type at microwave frequencies. The Bilinear calibration method is used to obtain complex permittivity e lessThan sup greaterThan * lessThan /sup greaterThan (w) from complex reflection coefficient r lessThan sup greaterThan * lessThan /sup greaterThan (w) over the frequency range 10 MHz to 10 GHz. The excess permittivity (e lessThan sup greaterThan E lessThan /sup greaterThan ), excess inverse relaxation time (1/t) lessThan sup greaterThan E lessThan /sup greaterThan , Kirkwood correlation factor (g lessThan sup greaterThan eff lessThan /sup greaterThan ) and thermodynamic parameters are also calculated to study the Solute-Solvent interaction. V. L. JADHAVPATIL, P. B. UNDRE AND S. N. HELAMBE Dielectric Constant, Relaxation time, Excess parameter, Kirkwood correlation factor, Time Domain Reflectometry 761-769