Bin, Mei and Gaidis, M. C. and Zmuidzinas, J. and Phillips, T. G. and LeDuc, H. G. (1997) Quasi-optical SIS mixers with normal metal tuning structures. IEEE Transactions on Applied Superconductivity, 7 (2, pt ). pp. 3584-3588. ISSN 1051-8223 http://resolver.caltech.edu/CaltechAUTHORS:BINieeetas97
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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).
|Additional Information:||© Copyright 1997 IEEE. Reprinted with permission. This work was supported in part by grants from NASA (NAGW-107 and NAG2-744), NASA/JPL, and a NSF PYI grant to J.Z. The junction fabrication was performed at the Center for Space Microelectronics Technology, Jet Propulsion Laboratory, California Institute of Technology, and was sponsored by NASA, Office of Space Access Technology. We are very grateful to P. Zimmerman for the loan of his 1 THz multiplier chain, and thank G. Blake and P. Stockman for their help with the FIR laser measurements.|
|Subject Keywords:||Fourier transform spectroscopy, alumina, circuit tuning, frequency response, niobium, submillimetre wave mixers, submillimetre wave receivers, superconducting device noise, superconducting device testing, superconductor-insulator-superconductor mixers|
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|Deposited On:||23 May 2006|
|Last Modified:||26 Dec 2012 08:53|
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