X-band Cylindrical Dielectric Resonator Based on Lithium-Niobium-Titanium-Oxide Microwave Ceramics

• Published in: 2023 IEEE 33rd International Conference on Microelectronics (MIEL) pp. 1 - 4
• Main Authors: Sekulic, D. L., Raonic, R. R., Ivetic, T. B.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 16.10.2023
• Subjects: II-VI semiconductor materials; Microwave communication; Microwave theory and techniques; Resonant frequency; Wireless communication; X-ray diffraction; Zinc oxide
• ISSN: 2159-1679
• DOI: 10.1109/MIEL58498.2023.10315867

In this study, we report on the performance of the cylindrical dielectric resonator fabricated by lithium-niobium-titanium-oxide (LNTO) ceramics modified with 0 and 5 wt% of ZnO as functional additive. These microwave ceramic materials were prepared by using a combustion-assisted solid-state reaction method and final cylindrical pellets with diameter of 9.5 mm and height of 1.3 mm were sintered at 900°C for 4 h. Using scanning electron microscopy and X-ray diffraction techniques, structural analysis confirmed the densely packed structure of the synthesized M-phase type LNTO ceramics with an average crystallite size in the nano range. The LNTO sample with 5 wt% of ZnO showed a higher temperature stability of dielectric constant and resonant frequency compared to the LNTO sample without ZnO. Further, the fabricated LNTO ceramic-based dielectric resonator possesses the minimum of the return loss at resonant frequency of 9.85 GHz with relative bandwidth of 4.9%.