Behavioral modeling of high power amplifiers based on measured two-tone transfer characteristics

Multi-stage high power amplifiers generally have a large memory effect and high nonlinearity. The usual AM-AM and AM-PM measurement data cannot descri be the large distortion characteristics in the presence of the system's lar ge memory. A more accurate amplifier is presented and the measurement setup for these characteristics is presented and the measurement setup for these characteristics is describe. The measure data are modeled using the conven tional AM-AM and AM-PM model to fit the measured amplitudes and phases of t he fundamental, third-order intermodulation (IM3) and fifth-order intermodu lation (IM5) components. This is a quasi-memoryless model. However, it prov ides a better description of memory effects and an accurate presentation of highly nonlinear characteristics than the same quasi-memoryless model base d on the single-tone transfer characteristics.