An accurate packaged model for HVHBT 120W power amplifiers and its application to 250W Doherty amplifiers

Summary form only given, as follows. An accurate packaged model is reported for GaAs HVHBT 120W amplifiers at 2140MHz. The model can precisely simulate small signal S-parameters as well as large signal harmonic load-pull power sweep. Very good agreement between simulation and measurement has been achieved. The model is then applied to simulate a 250W symmetric Doherty amplifier. The results of simulation agrees well with measurement. The difference in efficiency between simulation and measurement is only 1.6%.