Akademik Veri Yönetim Sistemi
32nd IEEE Conference on Signal Processing and Communications Applications, SIU 2024, Mersin, Türkiye, 15 - 18 Mayıs 2024
A reusable, non-contact, compact microstrip-based sensor that includes a complementary split-ring resonator is proposed to determine the dielectric properties of liquids. The sensor is designed using a three-dimensional electromagnetic simulation program to show a notch depth of −25.1 dB in the 2.45 GHz WLAN band in the transmission spectrum. The sensor is fabricated on a cost-effective 1.0 mm thick FR-4 substrate. The measured transmission spectrum shows good agreement with the simulation results. A glass capillary tube with an outer radius of 2.0 mm and inner radius of 1.0 mm is placed perpendicular to the sensor surface. Eight separate alcohol-based liquid test samples (ethanol, ethylene glycol, 2-propanol, DMSO, ethanol-water mixtures, pure water) are placed in a 6.5 mm3 capillary glass tube and their transmission spectra are measured. Dielectric constants of liquids are calculated from the relevant literature at the resonance frequency. A mathematical relationship is established between the dielectric constant and the resonance frequency. Information about the dielectric constant values of unknown liquid samples can be provided by practically using the proposed sensor.