Title :
Superconducting kinetic-inductance microwave filters
Author :
Carroll, K.R. ; Pond, J.M. ; Cukauskas, E.J.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
Several kinetic-inductance microstrip filters have been designed and tested. The microstrip consists of a superconducting niobium carbon nitride (NbCN) strip separated from a NbCN ground plane by an amorphous hydrogenated-silicon dielectric. The circuits investigated include an interferometer, a stepped-impedance, a low-frequency stub, and a high-frequency stub filter. Generally for frequencies below 20 GHz, good transmission characteristics were measured for these structures. A simple physical model is used to determine the major features of the transmission characteristics over a wide temperature and frequency range. Other important issues such as the superconductor and dielectric losses, impedance matching, and film uniformity are addressed for these structures.<>
Keywords :
dielectric losses; impedance matching; microstrip components; microwave filters; niobium compounds; superconducting junction devices; superconducting microwave devices; 0 to 25 GHz; NbCN-Si:H-NbCN; dielectric losses; film uniformity; high-frequency stub filter; impedance matching; interferometer; low-frequency stub; microstrip; physical model; stepped-impedance; superconducting kinetic inductance microwave filters; transmission characteristics; Circuit testing; Dielectric losses; Frequency; Microstrip filters; Microwave filters; Niobium; Strips; Superconducting films; Superconducting filters; Superconducting microwave devices;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
