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Broad-band, multi-harmonic frequency domain behavioral models from automated large-signal vectorial network measurements

This paper presents an extended nonlinear black-box behavioral model in the frequency domain, automated experimental identification of the model from large-signal vector network measurements, and extensive experimental validation of its application to real microwave ICs. The model is a broad-band extension of the multi-harmonic "linearized scattering function" theory. The characterization is based on large-signal vector network measurements where harmonic perturbations are applied, in phase and in quadrature, to a component excited at the input by a large amplitude tone. The experiment design and model generation are simple and highly automated. The derived model is shown to be valid for both small and large amplitude drive signals, correctly predict even and odd harmonics, and simulate, accurately, load-pull behavior far from 50 ohms. The model is implemented in Agilent ADS.