SMALL RF FILTERS MADE WITH THIN-FILM HIGH TEMPERATURE SUPERCONDUCTORS

摘要

We describe modeling and experimental results related to different variants of lumped element filters suitable for 0.5-3 GHz frequency range based on spiral inductors in combination with planar capacitors and segments of transmission lines. The inductive elements with conductor width of several tens of microns can have Qfactor exceeding 2000-3000 or even better depending on the film quality and thickness. These elements together with different designs of lumped capacitors can form a basis of high performance RF filters.