High-Tc Superconducting Dual-mode Disk Resonators with Attenuation Poles using Ground-slot

In order to meet stringent requirements on transmit filters, high-Tc superconducting dual-mode disk resonators with attenuation poles have been designed, fabricated, and measured. Using a ground-slot perturbation along the asymmetric plane from the feeder lines, the resonator fabricated with YBCO superconducting double-sided films showed high performance with attenuation poles at the both sides of the passband resulting in higher selectivity. From the experimental results, a design concept focusing on phase responses was found to be applicable to the appearance method of the attenuation poles.