A CALCULATION METHOD OF LARGE-SIGNAL CHARACTERISTICS OF MULTISTAGE POWER-AMPLIFIER MODULES USING SOURCE-PULL AND LOAD-PULL DATA

This paper describes a calculation method of large-signal characterist ics of multi-stage power amplifier modules using source-pull and load- pull data. An output power, a power-added efficiency, and a phase devi ation of multi-stage power amplifier modules are calculated based on t he source-pull and load-pull data, which are comprised of input and ou tput reflection coefficients, an input power, an output power, a phase deviation and a drain voltage and current, taking into account the so urce and load impedance of each stage FET. Applying this method to a 9 00 MHz two-stage Si-MOSFET power amplifier module. the calculated and measured results are in good agreement.