Abstract
A method of measurement of the real and imaginary parts of the dielectric constant of low-loss liquids is described. The real part of the dielectric constant is derived from the impedance change at an air–dielectric interface in a wave guide; the imaginary part is derived from attenuation measurements made on a liquid-filled guide. The results of initial measurements on carbon tetrachloride and heptane in the frequency range 8.2 to 12.4 Gc/s are given.