Design of a 30-GHz band 6-pole bandpass filter with a coaxial interface using high $\boldsymbol{T}_{c}$ superconductor coplanar H-slot resonators

Radio resources in a millimeter wave band will be depleted in the future similar to microwave bands. Therefore, a narrowband millimeter wave filter with an ultra-low loss and high selectivity, and good spurious characteristics will be an important component for next-generation wireless communications systems. We have been proposed a coplanar type H-slot resonator (CHSR) with a normal conductor with high Q and good spurious response. In this report, a 30 GHz band 6-pole bandpass filter with a coaxial interface using the CHSRs by a high
$\boldsymbol{T}_{c}$
superconductor is proposed. The simulated results validate the designed filter has an extremely excellent characteristic compared to a normal conductor one.