Quantum noise in SIS mixers
Abstract
In the present, quantum-statistical analysis of SIS heterodyne mixer performance, the conventional three-port model of the mixer circuit and the microscopic theory of superconducting tunnel junctions are used to derive a general expression for a noise parameter previously used for the case of parametric amplifiers. This expression is numerically evaluated for various quasiparticle current step widths, dc bias voltages, local oscillator powers, signal frequencies, signal source admittances, and operation temperatures.
- Publication:
-
IEEE Transactions on Magnetics
- Pub Date:
- March 1985
- DOI:
- 10.1109/TMAG.1985.1063669
- Bibcode:
- 1985ITM....21..939Z
- Keywords:
-
- Insulators;
- Josephson Junctions;
- Mixing Circuits;
- Noise Temperature;
- Quantum Statistics;
- Sis (Superconductors);
- Superconductors;
- Computerized Simulation;
- Equivalent Circuits;
- Heterodyning;
- Noise Prediction;
- Thermal Noise;
- Electronics and Electrical Engineering