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Nb/Al-Al2O3/Nb junctions with inductive tuning elements for a very low noise 205-250 GHz heterodyne receiverThe superconductor-insulator-superconductor (SIS) junction is the most sensitive nonlinear element for millimeter-wave heterodyne detection. An Nb/Al-Al203/Nb junction fabrication process has been developed which allows the use of planar tuning circuits integrated with the junctions. These tuning elements permit the use of junctions with relatively large areas and small current densities with excellent results. Recent measurements have yielded a double sideband receiver noise temperature less than 50 K from 205 to 240 GHz and 44 K at 230 GHz. This Nb/Al-Al203/Nb trilayer technology is also being extended to the fabrication of sub-square-micron area planar junctions for submillimeter-wavelengths.
Document ID
19920063446
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1109/22.137384
Authors
Lichtenberger, Arthur W. (NASA Headquarters Washington, DC United States)
Lea, Dallas M. (NASA Headquarters Washington, DC United States)
Mattauch, Robert J. (NASA Headquarters Washington, DC United States)
Lloyd, Frances L. (Virginia, University Charlottesville, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1992
Publication Information
Publication: IEEE Transactions on Microwave Theory and Techniques
Volume: 40
Issue: 5 Ma
ISSN: 0018-9480
Subject Category
Electronics And Electrical Engineering
Accession Number
92A46070
Funding Number(s)
CONTRACT_GRANT: NAGW-2377
CONTRACT_GRANT: NSF AST-89-22155
Distribution Limits
Public
Copyright
Other

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