Title :
Beating the quantum limit in SIS mixers
Author :
Wengler, Michael J. ; Bocko, Mark F.
Author_Institution :
Dept. of Electr. Eng., Rochester Univ., NY, USA
fDate :
3/1/1989 12:00:00 AM
Abstract :
The 2LO (double local oscillator) mixer is analyzed in the low-LO-power limit for a perfect SIS (superconductor-insulator-superconductor) diode. It is shown that a 2LO SIS mixer can beat the noise performance of a one-LO mixer by a factor of two. It is suggested that even lower noise is possible with an SIS when operated in some other way
Keywords :
electron device noise; mixers (circuits); solid-state microwave circuits; superconducting junction devices; EHF; SIS mixers; double local oscillator; heterodyne detection; low-LO-power limit; microwave operation; noise performance; quantum limit; superconductor-insulator-superconductor; voltage gain; Diodes; Frequency; Noise measurement; Optical amplifiers; Optical noise; Phase noise; Quantum mechanics; Superconducting device noise; Superconducting transmission lines; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
