Dielectric relaxation measurements for binary mixtures of Diethylene Glycol Monomethyl Ether or 2(2-methoxyethoxy ethanol) with nitrobenzene have been carried out over the entire range of concentration, using Time Domain Reflectometry (TDR) at 288K over the frequency range from 10MHz-20GHz. Bilinear calibration method is used to obtain complex permittivity e*(w) from complex reflection coefficient r*(e). The complex permittivity, excess permittivity(eE)excess inverse relaxation time,(1/t)E Bruggeman factor (fB ), Kirkwood correlation factor (geff,) are also calculated to study solute -solvent interactions.