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Uncertainties of Multiport VNA S-Parameter Measurements Applying the GSOLT Calibration Method

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6 Author(s)
Wei Zhao ; Sch. of Electro-Mech. Eng., Xidian Univ., Xian, China ; Xiaodong Yang ; Jiankang Xiao ; Abbasi, Q.H.
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For the general short-open-load-thru (SOLT) calibration of the n-port vector network analyzer with n + 1 measurement channels, the sensitivity coefficients for the S-parameters of the n-port device under test are developed as functions of the deviations of the scattering parameters for the SOLT calibration standards. Using the concept of general node equation, a generalized formula for the S-parameter deviations with respect to the error terms has been deduced. In addition, expressions representing the deviations of error terms with respect to the non-ideal calibration standards are given by a series of matrix operations. Finally, after calculation of sensitivity coefficients, they can be used for establishing the type-B uncertainty budget for S-parameter measurements.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:61 ,  Issue: 12 )