Microstrip resonators and filters using high-T sub c superconducting thin films on LaAlO sub 3
- TRW, Space and Technology Group, Redondo Beach, CA (US)
This paper reports on very low microwave losses in YBa {sub 2}Cu{sub 3}O{sub 7} linear resonators, ring resonators, and bandpass filters. We deposited the 1-2-3 on LaAlO{sub 3} substrates, patterned microwave circuits, and overcoated with a passivating LaAlO{sub 3} layer. HTS linear microstrip resonators demonstrated Q's greater than 1200 at 10 GHz, corresponding to surface resistances less than 300 {mu}{omega}. Identical silver resonators showed Q's of 60 and surface resistance of 15 m{omega}. The high frequency transition temperature for these HTS films was greater than 83 K. The authors measured Q's of 240 in ring resonators at 15 GHz. Finally, the authors designed, fabricated, and tested a 2-pole, Chebyshev narrow-bandwidth bandpass filter. The HTS filter was designed to be a 1 percent bandwidth with 0.1 dB ripple. Insertion loss was 2 dB at 4 K, rising to 3 dB at 77 K. The authors observed temperature dependence in the filter center frequency, which we attribute to kinetic inductance effects. The authors' HTS filters outperform similar cryogenic silver filters, indicating that practical levels of HTS performance have been achieved.
- OSTI ID:
- 6088823
- 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
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Related Subjects
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CAVITY RESONATORS
CHALCOGENIDES
CRYOGENIC STORAGE DEVICES
DESIGN
ELECTROMAGNETIC RADIATION
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
ENERGY LOSSES
EQUIPMENT
FILMS
FILTERS
HIGH-TC SUPERCONDUCTORS
INTEGRATED CIRCUITS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOSSES
MEMORY DEVICES
MICROELECTRONIC CIRCUITS
MICROWAVE RADIATION
OXIDES
OXYGEN COMPOUNDS
PASSIVATION
PERFORMANCE TESTING
PHYSICAL PROPERTIES
RADIATIONS
RARE EARTH COMPOUNDS
RESONATORS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING FILMS
SUPERCONDUCTORS
TESTING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE