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Influence of Non-Ideal TRM calibration Items to S-Parameter Measurement

For the dual-port vector network analyzer's TRM calibration technique based on the 7-term error model, the uncertainty of the S-parameters is determined as functions of the deviations of the reflection coefficients of the one-port calibration standards and of an imperfect through connections. This paper discussed the expression of this uncertainty, as well as experimentally verified it. Therefore, the uncertainty analysis for S-parameter measurement and modelling process can be established.