Time-varying volterra-series analysis of spectral regrowth and noise powerratio in FET mixers

This paper presents a direct and robust analysis technique for evaluating n onlinear distortion phenomena in FET mixers excited by multitone signals. T ime-varying Volterra-series analysis has previously been proven to be appro priate for small-signal intermodulation-distortion calculations in mixers e xcited by simple RF signals. Spectral convolutions of the suitably mapped c ontrol voltages are introduced in this paper in order to solve the nonlinea r current source calculations for narrow-band modulated or broad-band multi carrier RF signals. Simulations and measurements of a properly characterize d resistive mixer validate the accuracy of this direct and noniterative ana lysis tool for spectral regrowth and noise-power-ratio prediction in such a pplications.