Microwave superconducting filters

Conference · Thu Feb 28 23:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6045920

Talisa, S H; Janocko, M A; Jones, C K; McAvoy, B R; Talvacchio, J; Wagner, G R ^[1]; Moskowitz, C; Buck, D C; Billing, J; Brown, R ^[2]

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1. Westinghouse Electric Corp., Pittsburgh, PA (United States). Science and Technology Center
2. Westinghouse Defense and Electronic Systems Center, Baltimore, MD (United States)

This paper reports on high-temperature superconducting (HTS) planar strip filters used in applications where small size and low loss are desirable, such as radar and communications. A major factor for these devices is packaging, since not only thermal considerations are important but also those having to do with HTS material integrity. Four-pole, parallel-coupled microstrip line filters were fabricated using epitaxial YBa{sub 2}Cu{sub 3}O{sub 7} (YBCO) films deposited by off-axis sputtering on LaAlO{sub 3} substrates. Filters were made with and without superconducting ground planes. Because it is not possible as yet 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 and input power and temperature dependence were measured, as well as thermal cycling stability.

• OSTI ID: 6045920
• Report Number(s): CONF-900944--
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 27:2; ISSN IEMGA; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COMMUNICATIONS
COPPER COMPOUNDS
COPPER OXIDES
ELECTROMAGNETIC RADIATION
ENERGY LOSSES
FABRICATION
FILMS
FILTERS
HIGH-TC SUPERCONDUCTORS
LOSSES
MEASURING INSTRUMENTS
MEASURING METHODS
MICROWAVE RADIATION
OXIDES
OXYGEN COMPOUNDS
RADAR
RADIATIONS
RANGE FINDERS
SPUTTERING
STABILITY
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMAL INSULATION
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES