Millimeter wave mixing from deliberate grain-boundary weak links in epitaxial Tl sub 2 CaBa sub 2 Cu sub 2 O sub 8 films

Journal Article · Mon Aug 19 00:00:00 EDT 1991 · Applied Physics Letters; (United States)

DOI:https://doi.org/10.1063/1.106324· OSTI ID:5362021

Hong, J P; Kim, T W; Fetterman, H R ^[1]; Cardona, A H; Bourne, L C ^[2]

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1. Department of Electrical Engineering, University of California, Los Angeles, Los Angeles, California 90024 (US)
2. Superconductor Technologies, 460 Ward Drive, Santa Barbara, California 93111 (US)

Millimeter mixers have been fabricated from epitaxial films of Tl{sub 2}CaBa{sub 2}Cu{sub 2}O{sub 8}, using a bowtie antenna structure integrated with grain-boundary weak links that were deliberately formed during film growth. The bowtie antenna was utilized for broadband millimeter wave coupling of the radiation into the weak links. Heterodyne mixing of signals at both {ital V} band (55 GHz) and {ital W} band (94 GHz) frequencies, and subharmonic mixing at {ital V} has been observed at liquid nitrogen temperature for zero and finite bias voltage conditions. The dependence of the IF output on temperature, bias voltage, and millimeter wave signal power has been studied. Efficient mixing with bias voltage exhibited strong signals right up to {ital T}{sub {ital c}} (101 K).

• OSTI ID: 5362021
• Journal Information: Applied Physics Letters; (United States), Vol. 59:8; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
MICROWAVE RADIATION
CALCIUM OXIDES
COPPER OXIDES
SUPERCONDUCTING DEVICES
FABRICATION
THALLIUM OXIDES
ANTENNAS
GRAIN BOUNDARIES
HIGH-TC SUPERCONDUCTORS
MIXTURES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
DISPERSIONS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
EQUIPMENT
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SUPERCONDUCTORS
THALLIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
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426001 - Engineering- Superconducting Devices & Circuits- (1990-)