A single sideband suppressed carrier (SSBSC) interferometer for the measurement of dielectric properties of laser heated materials

A method to measure the dielectric properties of ceramic materials at high temperatures is described. The device is a Ka band microwave bridge which uses a single sideband suppressed carrier signal as reference. A carrier modulated by ferrite modulator around its maximum insertion loss gives a double sideband suppressed carrier signal. By addition of two such signals the SSBSC is obtained. The high rejection of the carrier and the other sideband gives results with the required accuracy. By this method the temperature range of dielectric measurements is extended to 2500 K.