Title :
Microwave superconducting filters
Author :
Talisa, S.H. ; Janocko, M.A. ; Jones, C.K. ; McAvoy, B.R. ; Talvacchio, J. ; Wagner, G.R. ; Moskowitz, C. ; Buck, D.C. ; Billing, J. ; Brown, R.
Author_Institution :
Westinghouse Sci. & Technol. Center, Pittsburgh, PA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
Four-pole, parallel-coupled microstrip line filters were fabricated using epitaxial YBa2Cu3O7 (YBCO) films deposited by off-axis sputtering on LaAlO3 substrates. Filters were made with and without superconducting ground planes. Because it is not yet possible to grow in-situ epitaxial films on both sides of a substrate, two separate substrates were used, one for the filter and one for the ground-plane. The devices were packaged so that the microstrip-to-ground-plane distance was the thickness of one of the substrates (0.43 mm). Passband characteristics, input power, and temperature dependence were measured, as well as the thermal cycling stability
Keywords :
barium compounds; high-temperature superconductors; lanthanum compounds; microwave filters; solid-state microwave circuits; strip line components; superconducting junction devices; yttrium compounds; LaAlO3; YBa2Cu3O7-LaAlO3; high-temperature superconductors; input power; microstrip-to-ground-plane distance; parallel-coupled microstrip line filters; superconducting ground planes; temperature dependence; thermal cycling stability; Microstrip filters; Microwave filters; Packaging; Sputtering; Substrates; Superconducting epitaxial layers; Superconducting films; Superconducting filters; Superconducting microwave devices; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
