CaltechAUTHORS
  A Caltech Library Service

A 100 GHz Josephson mixer using resistively-shunted Nb tunnel junctions

Schoelkopf, R. J. and Phillips, T. G. and Zmuidzinas, J. (1993) A 100 GHz Josephson mixer using resistively-shunted Nb tunnel junctions. IEEE Transactions on Applied Superconductivity, 3 (1). pp. 2250-2253. ISSN 1051-8223. http://resolver.caltech.edu/CaltechAUTHORS:SCHOieeetas93

[img]
Preview
PDF
See Usage Policy.

725Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:SCHOieeetas93

Abstract

The authors describe preliminary mixer results using resistively shunted Nb/AlOx/Nb tunnel junctions in a 100-GHz waveguide mixer mount. The mixer utilizes robust, lithographically defined devices which have nonhysteretic I-V curves. A receiver temperature of 390 K (DSB) has been obtained with a conversion loss of -6.5 dB. The receiver's behavior agrees qualitatively with the behavior predicted by the resistively shunted junction model. Substantial improvements in performance are expected with the use of better-optimized shunted junctions and numerical simulations suggest that, if devices with higher ICRN (critical-current normal-resistance) products can be obtained. Josephson effect mixers could be competitive with superconductor-insulator-superconductor (SIS) mixers at high frequencies.


Item Type:Article
Additional Information:© Copyright 1993 IEEE. Reprinted with permission. Research supported by NASA Grant NAGW-107, NASA Code R funding to JPL, and a NASA Graduate Student Researcher Fellowship (R. Schoelkopf). Manuscript received August 24, 1992 We would like to acknowledge the generous use of the facilities at the JPL Microdevices Laboratory, and particularly the assistance of H. G. LeDuc and B. Bumble with device fabrication. We also thank T. Buettgenbach, T. Groesbeck, J. Kooi, and J. Stern for many helpful discussions.
Record Number:CaltechAUTHORS:SCHOieeetas93
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHOieeetas93
Alternative URL:http://dx.doi.org/10.1109/77.233556
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:4931
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:13 Sep 2006
Last Modified:26 Dec 2012 09:02

Repository Staff Only: item control page