NDLI: Quasi-optical SIS mixers with normal metal tuning structures

Content Provider	IEEE Xplore Digital Library
Author	Mei Bin Gaidis, M.C. Zmuidzinas, J. Phillips, T.G. LeDuc, H.G.
Copyright Year	2002
Abstract	We recently reported (1996) a quasi-optical SIS mixer which used Nb/Al-oxide/Nb tunnel junctions and a normal-metal (Al) tuning circuit to achieve an uncorrected receiver noise temperature of 840 K (DSB) at 1042 GHz. Here we present results on several different device designs, which together cover the 300-1200 GHz frequency range. The mixers utilize an antireflection-coated silicon hyper-hemispherical lens, a twin-slot antenna, and a two-junction tuning circuit. The broad-band frequency response was measured using Fourier transform spectrometry (FTS), and is in good agreement with model calculations. Heterodyne tests were carried out from 400 GHz up to 1040 GHz, and these measurements agree well with the FTS results and with calculations based on Tucker's theory (1985).
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3584
Ending Page	3588
Page Count	5
File Size	698537
File Format	PDF
ISSN	10518223
Volume Number	7
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuit optimization Niobium Antenna measurements Circuit noise Temperature Silicon Lenses Frequency response Frequency measurement Fourier transforms
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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