Measurement of Dielectric Constant of Germanium at Microwave Frequencies

Dielectric constants and electrical conductivity of germanium were measured at microwave frequencies in the temperature range from 1.6° to 300°K by the resonant cavity method. The observed values of dielectric constants showed the size effect, and were corrected by taking depolarizing field into account. The imaginary or reactive part of the conductivity was shown apparently as the reduction of the effective dielectric constant. The temperature dependence of the relaxation time of charge carriers was estimated by using the simple classical relaxation formula