Publikationsdatum:
2019-08-28
Beschreibung:
The 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.
Schlagwort(e):
ELECTRONICS AND ELECTRICAL ENGINEERING
Materialart:
IEEE Transactions on Microwave Theory and Techniques (ISSN 0018-9480); 40; 5 Ma
Format:
text
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