Gaidis, Michael C. and LeDuc, Henry G. and Bin, Mei and Miller, David and Stern, Jeffrey A. and Zmuidzinas, Jonas (1996) Characterization of low-noise quasi-optical SIS mixers for the submillimeter band. IEEE Transactions on Microwave Theory and Techniques, 44 (7, pt.). pp. 1130-1139. ISSN 0018-9480 http://resolver.caltech.edu/CaltechAUTHORS:GAIieeetmtt96
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We report on the development of low-noise quasi-optical SIS mixers for the frequency range 400-850 GHz. The mixers utilize twin-slot antennas, two-junction tuning circuits, and Nb-trilayer junctions. Fourier-transform spectrometry has been used to verify that the frequency response of the devices is well predicted by computer simulations. The 400-850 GHz frequency band can be covered with four separate fixed-tuned mixers. We measure uncorrected double-sideband receiver noise temperatures around 5hν/kB to 700 GHz, and better than 540 K at 808 GHz. These results are among the best reported to date for broadband heterodyne receivers.
|Additional Information:||© Copyright 1996 IEEE. Reprinted with permission. Manuscript received December 6, 1995; revised March 20, 1996. This work was supported in part by Grants from NASA (NAGW-107 and NAG2-744), NASA/JPL, and a NSF PYI Grant to J. Zmuidzinas. 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. The authors would like to thank N. Erickson for the use of his 800-GHz multiplier chain, and G. Blake and P. Stockman for help with the FIR laser. We also wish to acknowledge advice and laboratory contributions from T. Biittgenbach, A. Clapp, J. Kooi, T. Phillips, P. Schaeffer, R. Schoelkopf, N. G. Ugras, and J. Ward.|
|Subject Keywords:||Fourier transform spectroscopy; frequency response; niobium; slot antennas; submillimetre wave antennas; submillimetre wave mixers; superconducting device testing; superconducting microwave devices; superconductor-insulator-superconductor mixers; type II superconductors|
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|Deposited On:||12 Sep 2006|
|Last Modified:||26 Dec 2012 09:02|
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