Measurement of Uniaxially Anisotropic Dielectrics With a Fabry–Perot Open Resonator in the 20–50 GHz Range
Tomasz Karpisz, Bartłomiej Salski, Paweł Kopyt, Jerzy Krupka, Marcin Wojciechowski
Abstract
Measurement results of uniaxially anisotropic materials performed with the aid of a plano-concave Fabry–Perot open resonator in the 20–50 GHz frequency range are presented and discussed in this letter. It is shown that a linear polarization of Gaussian modes applied in the characterization allows extracting in-plane complex permittivity of such materials as crystals and foils in a single measurement cycle. It is also shown that dielectric losses exhibit anisotropy, which can be quite significant, like in the sapphire, or relatively small, like in polymer foils.
Topics & Concepts
Materials scienceAnisotropySapphireResonatorFabry–Pérot interferometerDielectricOpticsPermittivityPolarization (electrochemistry)OptoelectronicsPhysicsLaserWavelengthPhysical chemistryChemistryMicrowave and Dielectric Measurement TechniquesAcoustic Wave Resonator TechnologiesMicrowave Engineering and Waveguides