Rapid Characterization of Powder Mixtures through High Q Dielectric Resonator

In this research work a high quality factor cylindrical dielectric resonator is used to determine the dielectric properties of powder mixtures. The setup is based on resonant perturbation theory and it has a potential to quickly and accurately characterize samples in quantities as small as a tens of milligrams. The loaded quality factor of the proposed dielectric resonator is 19,217, which is operated in TM01δ mode at 10.57 GHz. The measured results are compared with the calculated values obtained from different mixing models. The worst case measured dielectric constant error of 9.4% and 9.95% has been observed for mixtures of boric acid – titanium dioxide and baking soda – titanium dioxide respectively with variable concentrations of weight. The proposed technique is suitable to be deployed in industries in order to rapidly assess the mixture concentration before subjected to the detail investigation.