A 40GHz large-signal double-reflectometer waveform measurement system designed for load-pull applications

A new large-signal measurement system combining waveform and load-pull characterization is presented. The setup comprises a double-reflectometer testset and a microwave transition analyzer (HP 71500A) as fundamental and harmonic receiver. The system calibration can be of TRL or modified SOLT type. For the first time, this setup permits a complete description of the harmonic amplitude and phase spectra under arbitrary loading conditions of the DUT. As an application example, an AlGaAs HEMT was. characterized for different reflective fundamental frequency output loads.

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