Title :
Noise of superconductor/normal metal/superconductor mixer based on low voltage negative differential resistance effect
Author :
Gorelov, Y. ; Nicolsky, R.
Author_Institution :
Inst. de Fisica, Univ. Fed. do Rio de Janeiro, Brazil
fDate :
6/1/1999 12:00:00 AM
Abstract :
The conversion efficiency was calculated for some type of high-T/sub c/ superconducting junctions, which have negative derivative on current-voltage characteristics. This distinguishing feature can be explained by Andreev reflections in superconductor/normal metal boundaries. In this work it is analyzed a combination of the theoretical predictions of noise, based on noise correlation matrix of the mixer model, and theory of Likharev-Semenov for the thermal noise. The conversion gain is possible in SNS mixers in spite of noise in negative derivative region.
Keywords :
high-temperature superconductors; negative resistance devices; superconducting device noise; superconducting mixers; superconductor-normal-superconductor devices; thermal noise; Andreev reflection; Likharev-Semenov model; conversion efficiency; current-voltage characteristics; gain; high-T/sub c/ superconducting junction; low voltage negative differential resistance; noise correlation matrix; superconductor/normal metal/superconductor mixer; thermal noise; Current-voltage characteristics; Frequency; Josephson junctions; Low voltage; Reflection; Semiconductor device noise; Superconducting device noise; Superconducting devices; Superconducting microwave devices; Tunneling;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
