A resonance system for measuring complex permittivity of materials

Preliminarily it has been shown [1] that an open resonator (OR) attached to a certain-length superdimensional circular waveguide only maintains axially-symmetric TE_01q oscillations (see Fig. 1, b and c). In addition, the resonant system of the kind features a single-frequency response over a wide frequency range and, hence, can be adopted for the determination of electro-physical parameters of materials. An approximate mathematical model of the resonator of the kind has been suggested, and its basic electrodynamical properties were theoretically studied and experimentally checked [2-4].