Vector gain based EVM estimation at mm-wave frequencies
5G and future 6G applications rely on high-frequency communications that need to be enabled by the development of suitable active devices operating at millimeter and sub-millimeter waves. There is, therefore, an increasing need for affordable solutions to verify device linearity at these very high frequencies. In this talk, we present a method for estimating linearity performances of devices operating in the (sub-)millimeter-wave region, under modulated signals and over different loading conditions. The proposed method uses the power-dependent vector gain extracted during continuous-wave active load-pull measurements, correlates to measurements under complex modulated stimulus and predicts the best loading condition for linearity.