Performance of a high T sub c superconducting ultralow-loss microwave stripline filter

Journal Article · Sun Mar 03 23:00:00 EST 1991 · Applied Physics Letters; (USA)

DOI:https://doi.org/10.1063/1.104461· OSTI ID:5633979

Zahopoulos, C; Sridhar, S ^[1]; Bautista, J J; Ortiz, G ^[2]; Lanagan, M ^[3]

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1. Department of Physics, Northeastern University, Boston, Massachusetts 02115 (US)
2. Jet Propulsion Laboratory, 4100 Oak Grove Drive, Pasadena, California 91109 (USA)
3. Argonne National Laboratory, Argonne, Illinois 60439 (USA)

We report the successful fabrication of a five-pole interdigital stripline filter made of the 93 K superconductor Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub {ital y}} coated on a silver substrate, with a center frequency of 8.5 GHz and an extremely high rejection ratio of 80 dB. The lowest insertion loss measured was 0.1 dB at 12 K, with a return loss better than 16 dB, representing significant improvements over a similar Cu filter, and comparable to low {ital T}{sub {ital c}} filters. The insertion loss appears to be limited by extrinsic factors such as tuning mismatch and joint losses, and not by the superconducting material losses.

• OSTI ID: 5633979
• Journal Information: Applied Physics Letters; (USA), Journal Name: Applied Physics Letters; (USA) Vol. 58:9; ISSN APPLA; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRONIC EQUIPMENT
EQUIPMENT
FILMS
HIGH-TC SUPERCONDUCTORS
MICROWAVE EQUIPMENT
PERFORMANCE
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
USES
WAVEGUIDES