ABSTRACT
Phase control of amplifier pairs enhances their controllability and adds flexibility to their power control characteristics. This chapter provides the circuit topology of the phase-controlled Class E power amplifier (PA) pair, where two single-ended Class E PAs are combined through a transformer-combiner circuit to provide the total radio frequency (RF) output power. The harmonic components of the circuit voltages and currents obtained at the end of the iteration process can be used to compute critical circuit variables such as the rms current and voltage stresses on the switching devices and other critical filter components. The chapter discusses the pulsing of Class E amplifiers and illustrates the formulation, simulation, and measurement results. Ideal switches and components are used to demonstrate the operational principle of the amplifier and derive the equations. In the phase-controlled pulsing amplifier circuit, IXFH12N100 metal oxide field effect transistors (MOSFETs) are connected in parallel for the master and slave sides.
