A novel method of finding the dielectric constant of ceramic materials in microwave range with dielectric resonator antenna setup using the HEM11δ mode

Abstract

A novel method to measure the dielectric constant (εr) of a ceramic material at GHz range has been introduced in this work. The dielectric measurement technique using the Micro-Strip Line (MSL) coupled Dielectric Resonator Antenna (DRA) setup with simulation assisted results has been detailed. The resonance frequency corresponding to the HEM11δ mode is extracted from the reflection coefficient (S11 parameter) and utilized to measure εr for DRA made from the material under investigation. Initially, ZrO2 sample, with known εr, is used to verify the proposed method. An εr value of ∼17.5 has been experimentally obtained using the proposed method. Then, the measurement is done for a system with completely unknown εr i.e., a composite of (1-x)BaTiO3-(x)NiO, x = 0, 0.05, 0.1, and 0.15. A detailed structural characterization study has been utilized for the BaTiO3-NiO samples to understand the material properties at the fundamental level. The experimental value of the εr in the GHz range was obtained as 24.2, 32.3, and 29.5 for x = 0.05, 0.1, and 0.15, using the proposed technique. © 2024 Elsevier Ltd and Techna Group S.r.l.