Permittivity measurements of lossy liquids in the range 26 110 GHz

Abstract

We describe a free air transmission method for the determination of the permittivity of lossy liquids in the frequency range 26–110 GHz and the temperature range -5 to 70 °C. For pure water the method gives permittivity values with a dispersion of less than 3% about the true value. We give new permittivity data for an aqueous NaCl solution and for synthetic sea water in the temperature range -2 to 30 °C.