Complex permittivity of D2O at 35 GHz over the temperature range 4–62.5°C

Abstract

A microwave bridge operating at a frequency of 34.85 GHz was used to measure the complex permittivity of D₂O over a temperature range 4–62.5°C. A precision of 0.12 was achieved in both ε′ and ε″. The results have been analysed to provide values of the relaxation time τ₀ and the real component of the permittivity at high frequencies ε_∞. The predicted value of this latter parameter is consistent with recent permittivity and absorption measurements carried out in the far infra-red.