Envelope Tracking Simulation with ADS
Application Notes
Modern modulated signals often have high peak-to-average power ratios (PAPR). Use of such high PAPR signals results in power amplifiers (PAs) having to operate at a large back-off when stringent linearity requirements must be satisfied. Operating a PA at relatively high output power back-off ensures the signal is not greatly distorted when its envelope excursion is near its peak. However, the greater the amount of back-off, the lower the PA’s efficiency.