Title :
Microwave properties of voltage-tunable YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta///SrTiO/sub 3/ coplanar waveguide transmission lines
Author :
DeGroot, D.C. ; Beall, J.A. ; Marks, R.B. ; Rudman, D.A.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
To explore the electrical characteristics of monolithic microwave circuits with integrated high-temperature superconductor and ferroelectric materials, we fabricated a series of coplanar waveguide transmission lines in laser-deposited YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// and SrTiO/sub 3/ thin films. We characterized the voltage-tunable two-port microwave response of the transmission lines at cryogenic temperatures using a calibrated network analyzer system. Total phase shifts and phase tuning in these devices increased for increasing ferroelectric film thickness with only moderate increases in transmission loss.<>
Keywords :
MMIC; barium compounds; coplanar waveguides; electron device manufacture; ferroelectric thin films; high-temperature superconductors; strontium compounds; superconducting microwave devices; superconducting thin films; tuning; yttrium compounds; CPW transmission lines; HTSC thin film; SrTiO/sub 3/; YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta//; YBa/sub 2/Cu/sub 3/O/sub 7/-SrTiO/sub 3/; coplanar waveguide; cryogenic temperatures; electrical characteristics; ferroelectric film thickness; ferroelectric materials; high-temperature superconductor; laser-deposited YBCO; microwave properties; monolithic microwave circuits; phase shifts; phase tuning; transmission loss; two-port microwave response; voltage-tunable line; Coplanar transmission lines; Coplanar waveguides; Distributed parameter circuits; Electric variables; Ferroelectric materials; High temperature superconductors; Masers; Superconducting transmission lines; Voltage; Waveguide lasers;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
