HIGH-TEMPERATURE SUPERCONDUCTING DUAL-MODE RESONATOR ON (100) MGO SUBSTRATE

We report, for the first time to our knowledge, a clear resonant peak split in the range of 7.7-9.7 GHz in a perturbed dual-mode disk-type r esonator (DMDR) made of YBa2Cu3O7-x (YBCO) superconducting thin film o n MgO substrate. Epitaxial YBCO superconducting thin films were grown on (100) MgO substrates by pulsed laser deposition technique. The crit ical temperature of superconducting thin film on MgO substrate was 85 K. Superconducting dual-mode disk resonators were designed by microwav e design software, EEsof, and patterned by photolithography and a wet- etch process. The unloaded quality factor (Q(UL)) of the superconducti ng DMDR was found to be 1,312 at 77 K. We believe this type of DMDR ca n be utilized for dual-mode resonator-based filters for satellite comm unications.