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An improved calibration technique for on-wafer large-signal transistor characterization

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2 Author(s)
Ferrero, A. ; Dipartmento di Elettronica, Politecnico di Torino, Italy ; Pisani, U.

The on-wafer measurement of complex quantities and absolute power levels of active devices is truly significant for nonlinear device characterization and modeling. An original procedure, which allows one to perform both the vector and the power calibrations at the RF wafer probe tips used for on-wafer measurement of two-port devices, is presented. The measurement system is based on an automatic vector network analyzer with coaxial directional couplers and RF coplanar wafer probes. A new error model of the dual directional coupler, which samples the power waves traveling at device output, allows one to take advantage of the coaxial section at the output of the measuring system for calibrating the power level up to the on-wafer probe tips

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Instrumentation and Measurement, IEEE Transactions on  (Volume:42 ,  Issue: 2 )