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 04:00:00 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]

---

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

Related Subjects

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