700 MHz Split post dielectric resonator for measurements of the complex permittivity of fluoropolymer materials

The split post dielectric resonator (SPDR) operating at frequency 700 MHz has been used to measure dielectric constant and loss tangent of fluoro-polymer materials. It has been proven that this technique allows one to measure real permittivity with uncertainty less than 0.5% and dielectric loss tangent with resolution on the order of 3/spl times/10/sup -5/ for low permittivity polymers.