Saturated PAs for High Efficiency: Operation of Saturated Amplifiers Having the Optimum Voltage Waveform to Achieve Maximum Efficiency

High efficiency is a crucial design consideration. This is true not only for power amplifiers (PAs), but also for transmitters such as the Doherty PA and the supply-modulated PA, due to thermal management, reliability, and size [1]-[3] issues. Several PA topologies, e.g., class E, class F, and class F-1, have been proposed to achieve high efficiency [3]-[17]. In the class-E PA, a transistor acts a...