Comparison of Techniques for Microwave Characterization of BST Thin Films

Various techniques involving coplanar waveguide transmission lines, coplanar resonators, and interdigital capacitors, have been employed to characterize the dielectric properties of Ba
_0.05
Sr
_0.95
TiO
₃
thin films at cryogenic conditions. The devices were patterned from a high-temperature superconductor deposited on top of a single Ba
_0.05
Sr
_0.95
TiO
₃
thin film. The measurements from these various techniques show a good agreement