CONSIDERATION ON THE MEASUREMENT SYSTEM OF THE COMPLEX DIELECTRIC CONSTANT.

The complex impedance of the dielectric material is obtained from the measurement of the standing wave on the transmission line. However, the complex dielectric constant ( epsilon ) can not be easily obtained from the measured values of the impedance (Z), since, epsilon is a many valued function of Z. In order to attack this problem, (1) a chart method, (2) a selecting method of the true epsilon among many computed values, (3) a computing time saving method, are discussed in this paper. In the SHF region, epsilon is obtained from the measurement of the reflecting wave from the large test piece in the space, and two-measurement ways are proposed; one is the quasi-Brewster angle method, and the other is the optimum reflecting coeficient curve method.