NDLI: Performance of Arrays of SIS Junctions in Heterodyne Mixers

Content Provider	IEEE Xplore Digital Library
Author	Crete, D.-G. Mcgrath, W.R. Richards, P.L.
Copyright Year	1963
Description	We have made a systematic experimental study of the performance of millimeter-wave quasiparticle heterodyne mixers which use arrays of SIS tunnel junctions. Sets of arrays with N =1, 5, 10, 25, and 50 junctions in series were fabricated by photolithography. All of the arrays in a given set were made on a single silicon wafer so that their response time parameter omega/sub S/R/sub N/C would be the same. Junction areas were scaled so that the total impedance was the same for each array in a set. Sets of arrays from four wafers with values of omega/sub S/R/sub N/C ranging from 2.6 to 13 were evaluated in mixers at 33 and 36 GHz. These measurements showed that the signal power required to saturate the mixers varies as N/sup 2/ and that the conversion efficiency is nearly independent of N for all values of omega/sub S/R/sub N/C. The mixer noise temperature is independent of N for large values of omega/sub S/R/sub N/C. Therefore, the dynamic range of an SIS quasiparticle mixer can increase in proportion to N/sup 2/. For small values of as omega/sub S/R/sub N/C, however, the mixer noise increases systematically with N. This correlation suggests that the junction capacitance affects the coupling between junctions that can contribute to the noise.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	435
Ending Page	440
Page Count	6
File Size	1344345
File Format	PDF
ISSN	00189480
Volume Number	35
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1987-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Physics Microwave antenna arrays Radio frequency Capacitance Lithography Delay Impedance Power measurement Noise measurement Temperature
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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Wideband submillimeter receivers based on series distributed SIS junctions

A planar quasi-optical SIS receiver

Noise parameters of SIS mixers

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A Simple Integrated Matching Element for SIS Quasiparticle Mixers

Design and development of SIS mixers for ALMA band 8

Embedding impedance approximations in the analysis of SIS mixers

Performance of a two-junction array SIS-mixer operating around 345 GHz

Performance of Arrays of SIS Junctions in Heterodyne Mixers

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