Experimental Determination of the Dielectric Permittivity of Materials: Resonant Rings and Far-Field Antennas

This study focuses on the precise measurement of dielectric permittivity, a crucial parameter in material characterization with extensive applications in materials science and electronic engineering. Addressing the inherent limitations of traditional methods such as transmission/reflection line techniques and resonant cavities, we introduce a novel approach that integrates ring resonator techniques with far-field measurements utilizing horn antennas. Our methodology, applied to 2 mm glass samples across a frequency range of 2–8 GHz, reveals a marked improvement in the accuracy and consistency of dielectric permittivity measurements. This approach effectively mitigates previous challenges, including inaccuracies and inconsistencies in specific frequency ranges and variations due to material properties. The advancement not only deepens the scientific understanding within material science but also holds substantial practical implications for electronic engineering and allied fields. The study underscores the necessity of continued innovation in developing precise, adaptable measurement techniques to meet the demands of both industrial and research applications.