Superconducting Lumped-Element Filter with Spiral Inductors

This paper presents theoretical and experimental results for a novel three-pole HTS lumped-element narrowband filter with central frequency 1.7775 GHz and 0.84% fractional bandwidth. A high degree of miniaturization is reached by the nse of planar coils as inductance elements. Good performance on YBCO devices has been achieved. (C) 2001 John Wiley & Sons, Inc