A SSBSC Interferometer for the Dielectric Prperties Measurement of Laser Heated Materials

High-power laser radiation has been used for heating ceramic samples in order to make measurements of their dielectric properties at temperatures ranging from the ambient to the destruction temperature. Considerations about the required specifications are discussed. A Ka-band microwave bridge using a single-sideband suppressed carrier signal as reference is described. 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 signal is obtained. The high rejection of the carrier and the other sideband allows to obtain results with the required accuracy.