The Determination of the Dielectric Constants of Aqueous Salt Solutions at Ultra High Frequencies

The determination of the dielectric constants of aqueous salt solutions is accomplished by an adaptation of the method used by Paul Drude in 1897. A stable ultra high frequency vacuum tube oscillator is used to produce standing waves in an inductively coupled Lecher wire system. The wave length used is 123 cm. The resonant point on the parallel wires, crossed by a condenser containing the salt solution, is used to measure the dielectric constant. The results obtained with KCl and K2SO4 solutions indicate that interesting and reliable results may be expected even for good conductors