Complex permittivity measurement for a low loss dielectric rod using a novel 50 GHz band TM010 mode cavity

Complex permittivity of a low loss dielectric rod are often evaluated by a perturbation method using a TM010 mode cavity in microwave region, since the method is an extremely simple and easy treatment for not only experts but also non-experts. However, there are few reported to apply the perturbation method using millimeter wave band because a cavity dimension of the scale model is too small and is not realistic for material evaluation. In this paper, a simple and easy measurement technique for a dielectric rod is proposed using novel 50-GHz band TM010 cavities based on an improved perturbation method. The measured results validate the accuracy and the usefulness for the proposed method and cavity.