A Novel Cavity Resonator with TM010 Mode and 8.5-GHz Frequency for Complex Permittivity Measurement

Perturbation method is one of main methods to measure the complex permittivity of materials since the method is easy and simple to implement. In this paper, we propose a novel design of cavity resonator with a TM
010
mode at the 8.5-GHz frequency based on the perturbation method. Using the cavity, we perform a series of measurement simulations for typical low-loss materials based on the well-known HFSS. The relative errors of measured values for the real part and loss tangent of permittivity are within 0.8% and 8.0%, respectively. The measured results by simulations validate the effectiveness and accuracy of the cavity method.