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A Load–Pull Characterization Technique Accounting for Harmonic Tuning

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6 Author(s)
Vadala, V. ; Dept. of Eng., Univ. of Ferrara, Ferrara, Italy ; Raffo, A. ; Di Falco, S. ; Bosi, G.
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A novel methodology for the characterization of the nonlinear dynamic behavior of electron devices (EDs) is presented. It is based on a complete and accurate ED characterization that is provided by large-signal low-frequency I/V measurements, performed by means of a low-cost setup, in conjunction with any model-based description of the nonlinear reactive effects related to ED capacitances. The unique feature of the proposed technique is that a fully harmonic control of waveforms at the current generator plane is achieved, and as a consequence, high-efficiency operation can be simply investigated. Different experimental data are presented on GaAs and GaN transistors, and to definitely verify the capability of the new approach, the design of a class-F GaN power amplifier is deeply investigated as a case study.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:61 ,  Issue: 7 )