ISSTT Proceedings

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Improved Superconductive Mixer Coupling: Sub-millimeter Performance without Sub-micron Lithography

Authors:
J.A. Carpenter, E.R. Arambula, E.B. Guillory, A.D. Smith
Abstract:
Superconductor-Insulator-Superconductor (SIS) mixers stand as the most sensitive heterodyne detectors of millimeter and sub-millimeter wave radiation. Nevertheless, scientists attempting to apply SIS mixers to sub-milirneter wavelengths have been forced to cope with limited dynamic range, critical tuning of junction capacitance, and difficult lithographic requirements. This paper describes a novel U-coupling scheme, in which an on-chip impedance transformer matches large, low impedance junctions to the high impedance of waveguide and free space. By operating low impedance junctions, the system dynamic range improves by 15 dB, while junction tuning become significantly easier.
Categories:
Circuits, Miscellaneous
Year:
1991
Session:
9
Full-text:
Download a PDF of this paper.
Page Number(s):
558-572