Dielectric Measurement Methods at Millimeter Wave Frequencies
Michael D. Janezic
We review several techniques for making accurate relative permittivity and loss tangent measurements of low-loss dielectric materials at frequencies between 30 and 100 GHz. Many conventional methods that operates at microwave frequencies are impracatical at millimeter-wave frequencies. In this paper, we survey four resonant measurement methods that operate above 30 GHz-- the split-cylinder resonator, split-post resonator, whispering gallery mode methods, and Fabry-Perot resonator.