Application Note: VNA Dynamic Range And Linearity Accuracy

As Vector Network Analyzer (VNA) dynamic range requirements become more demanding, it becomes more important to better understand how receiver non-linear characteristics affect VNA calibrations and measurement accuracy. By identifying the problems and improving the understanding of receiver behavior while pushing the limits of dynamic range performance, one can better understand how to properly configure the system for maximum dynamic range while minimizing measurement uncertainty. At the heart of the discussion is the concept of receiver linearity and how it impacts calibration and measurement accuracy. While other papers describe in more detail the accuracy issues of non-linear calibration, this application note describes the practical aspects of configuring a VNA system for maximum dynamic range while limiting measurement uncertainty.