Akademik Veri Yönetim Sistemi
Measurement: Journal of the International Measurement Confederation, cilt.257, 2026 (SCI-Expanded, Scopus)
This paper presents a triple-band microwave dielectric sensor operating in the 0–5 GHz frequency range. The sensor features a microstrip line on the front side and two interdigital capacitor resonators on the ground plane. Test samples with dielectric constants ranging from 1 to 8 are placed over the capacitors, and the transmission spectra are numerically calculated. Polynomial equations are established to relate the frequency shifts with dielectric constants. The fabricated bare sensor exhibits resonance frequencies at 1.53 GHz, 3.02 GHz, and 3.86 GHz, with corresponding notch depths of −26.73 dB, −28.62 dB, and −26.83 dB. Standard samples (FR-4, wood, polycarbonate, Teflon, PVC, plexiglass, glass, rubber, elastic rubber) are used to validate the sensor's performance. Experimental results show strong agreement with literature values, with an average deviation of 1.5 %. The sensor's measured normalized average sensitivities are 4.91 %, 4.61 %, and 4.86 % across the three bands. Compact, robust, and sensitive, the proposed sensor offers accurate dielectric sensing across multiple frequency bands, making it particularly suitable for applications in material analysis, quality control, and industrial dielectric characterization.