Modified ELC-IDE Microwave Planar Sensor for Characterization of Solid and Liquid Materials

Microwave sensors are playing an important role in various industries because of their strong applications in material characterization. The compact size, high sensitivity, and lower error are key in designing a sensor. In this work a planar microwave sensor is proposed. ELC-IDE structure and DGS are used to increase the strength of the electric field density. The permittivity of the solid and liquid material can be calculated from the resonance frequency. The experimental results show a high Q factor and high sensitivity 6%, and average error 4 %. The size of the proposed sensor is 30×42×2.5mm and operating frequency 4.4313GHz. This work will be applicable for industrial applications to characterize liquid and solid dielectric material.