Fabrication and characterization of high T sub c superconducting x-band resonators and bandpass filters
- Hughes Research Labs., Malibu, CA (United States)
This paper reports on microstrip passband filters with 3, 6, and 11 poles, as well as microstrip resonators, fabricated using post-annealed Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub x} (YBCO) films deposited on LaAlO{sub 3} substrates using 3-target simultaneous co-sputtering. The insertion loss in the passband for the filters with center frequencies between 9.5 and 13.4 GHz was {le}0.3 dB at 50K and {le}0.6 dB at 77K for the 3 and 6 pole filters, respectively. The out of band rejection was greater than 50 dB. The excellent filter performance was attributed to the use of highly c-axis oriented post-annealed YBCO films. The quality of these films depended strongly on substrate preparation, film thickness, density of YBCO grain boundaries, and crystallographic orientation of the grains. Microstrip ring resonators fabricated with optimized YBCO films had Qs as large as 3800 at 9.5 GHz. The surface resistance and penetration depth for the YBCO films were determined from the temperature dependence of the measured Qs and resonant frequencies of the resonators.
- OSTI ID:
- 6089666
- Report Number(s):
- CONF-900944-; CODEN: IEMGA
- Journal Information:
- IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
HIGH-TC SUPERCONDUCTORS
GRAIN BOUNDARIES
SUPERCONDUCTING CAVITY RESONATORS
FABRICATION
SUPERCONDUCTING FILMS
BARIUM OXIDES
CALCULATION METHODS
CHEMICAL PREPARATION
COPPER OXIDES
CRYSTALLOGRAPHY
FILTERS
PENETRATION DEPTH
PERFORMANCE
SPUTTERING
SUBSTRATES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
YTTRIUM OXIDES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CAVITY RESONATORS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FILMS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
665412* - Superconducting Devices- (1992-)
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies
665411 - Basic Superconductivity Studies- (1992-)