研究目的
To assist the SIS mixer optimization tasks by programming and upgrading SISMA (SIS Mixer Analyzer), providing comparable functions as by SuperMix but more efficient in doing optimization with a graphic interface and capable of simulating distributed series junction arrays.
研究成果
SISMA is a high efficient and versatile simulation software programmed for SIS mixer design and analysis. It is particularly useful in the optimization of SIS mixer in broad parametric spaces and in the simulation of SIS mixers with distributed series-connect junction arrays.
研究不足
The software is limited to simulations of SIS mixers with single junction or junction arrays, and the nonlinearity is approximated up to the 2nd harmonic.
1：Experimental Design and Method Selection:
The software is based on quantum mixing theory and a proximation of the nonlinearity up to 2nd harmonic. A new fixed-point iteration algorithm is designed to solve the large-signal nonlinear equation.
2：Sample Selection and Data Sources:
The software is used for the design of SIS mixers with single junction or junction arrays.
3：List of Experimental Equipment and Materials:
The software itself is the main tool, with no specific equipment or materials listed.
4：Experimental Procedures and Operational Workflow:
The design starts with a frame of configuration, followed by optimizations of junctions, tuning circuit parameters, and the embedding impedance.
5：Data Analysis Methods:
The software provides various parametric sweeping functions, and the numerical results can be immediately plotted in the graphic interface.
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