Dielectric Properties of Conductively Loaded Polyimides in the Far Infrared

Abstract

The dielectric properties of selected conductively-loaded polyimide samples are characterized in microwave through far infrared wavebands. These materials, belonging to the Vespel\textsuperscript{\textregistered} family, are more readily formed by direct machining than their ceramic loaded epoxy counterparts and present an interesting solution for realizing absorptive optical control structures. Measurements spanning a spectral range from 1 to 600\,$\mathrm{c}{\mathrm{m}}^{-1}$ (0.03 to 18\,THz) were preformed and used in parametrization of the media's dielectric function at frequencies below $\approx 3$THz.

4 pages, 4 figures, 2 tables