Millimeter-wave dielectric properties of materials

The relationship between measured and calculated quantities in the study of the millimeter-wave dielectric properties of materials is examined. Some modern dielectric measurement techniques (dispersive Fourier transform spectroscopy, Mach-Zehnder-IMPATT spectrometer measurements, and the open-resonator method) are described and compared. A compendium of data is presented, where illustrations show a comparison of some common materials (e.g., fused-silica glass, alumina, silicon, GaAs, ZnS, ZnSe, and fluorocarbon electronic cooling fluids) in terms of their spectra of absorption coefficient, refractive index, real and imaginary parts of the permittivity, and loss tangent.