10-GHZ BANDPASS YBCO SUPERCONDUCTING MICROSTRIP FILTER

High-T-c superconductor three-pole narrow bandpass microstrip filters fabricated from in situ deposited YBCO epitaxial thin films on LaAlO3 substrates are presented. The CAD tool of the filter is EEsof Touchsto ne Workbench. All the parameters which were necessary in our filter de sign such as substrate dielectric constant, RF conductivity of YBCO th in films and substrate loss-tangent were extracted from an inverse sim ulation of a high-T-c straight line microstrip resonator. A 446 MHz pa ssband in 9.57 GHz with 0.4-2.2 dB insertion loss in band was reported and some coincidence with the design was shown.