Millimeter-wave Characterization for Dielectric Substrates and Conductors in 110-220 GHz

This paper presents the millimeter-wave characterization techniques for dielectric substrates and conductors by using a quasi-optical Fabry-Perot open resonator (FPOR). Compared with the conventional waveguide-coupled FPORs, the proposed resonator can simultaneously operates in the D-band and G-band. The position and the size of the feeding apertures on the spherical mirrors are carefully considered and a fairly high Q-factor of the resonator is achieved. The complex permittivity of polymer and the reflection loss of metal samples are accurately measured non-destructively in the range of 110-220 GHz.