Article “Comparative Analysis of Machine Learning ‎Techniques for Temperature Compensation in ‎Microwave Sensors” was accepted for publication in IEEE Transactions on Microwave Theory and Techniques

Articles
Nazli's article "Comparative Analysis of Machine Learning ‎Techniques for Temperature Compensation in ‎Microwave Sensors" was accepted for publication in IEEE Transactions on Microwave Theory and Techniques. Congratulations! Abstract: The planar nature of microwave sensors leaves them vulnerable to ambient temperature changes with potential impact on the perception of the material under test. A temperature compensation technique is required to consider its direct effect on the dielectric property of materials. In this article, machine learning algorithms are employed in two configurations of classifier and regressor on frequency response of a split-ring resonator operating at 1.19 GHz. A wide range of dielectric constant is covered with concentrations of [0:20%:100%]-methanol/acetone in water with a temperature cycle of 25 °C-50 °C. This broad variety of cases captures the complicacy of entangled trends that are…
Read More

Article “A High-Resolution Reflective Microwave Planar Sensor for Sensing of Vanadium Electrolyte” has been accepted to MDPI Sensors

Articles
Article "A High-Resolution Reflective Microwave Planar Sensor for Sensing of Vanadium Electrolyte" has been accepted to MDPI Sensors. Congratulations, Nazli and Kalvin! Abstract: Microwave planar sensors employ conventional passive complementary split-ring resonators (CSRR) as their sensitive region. In this work, a novel planar reflective sensor is introduced that deploys CSRRs as the front-end sensing element at fres=6 GHz with an extra loss-compensating negative resistance that restores the dissipated power in the sensor that is used in dielectric material characterization. It is shown that the S11 notch of −15 dB can be improved down to −40 dB without loss of sensitivity. An application of this design is shown in discriminating different states of vanadium redox solutions with highly lossy conditions of fully charged V5+ and fully discharged V4+ electrolytes.
Read More