A Permittivity Measurement Equipment Based on Oblique Aperture Ridge Waveguide

In this paper, a non-contact permittivity measurement device based on oblique aperture ridge waveguide using transmission/reflection method is presented, which is designed to accurately measure the complex permittivity of corrosive liquids and expand the industrial applications of microwave energy. Scattering parameters of the proposed measurement device were simulated at 2.45 GHz and room temperature. The permittivities of the materials to be measured were obtained by artificial neural network algorithm, in which taking the scattering parameters as input. The simulation results are consistent with the setting values, which verifies the accuracy of the measurement. The test tube is used as the container for the object to be tested, which avoids the corrosion of the liquid to the measuring device. The system can also measure the dielectric properties of solids and solid powders at room or high temperature, and has good prospects in the industrial applications of microwave energy.