Switched-mode RF and microwave parallel-circuit class E power amplifiers
The parallel-circuit Class E tuned power amplifiers with load networks consisting of either one capacitance and one inductor or a parallel LC circuit and series filter are described and analyzed. The elements of the load networks are defined using the same analytical approach with a set of the exact design equations. The ideal collector voltage and current waveforms for both configurations demonstrate a possible 100% efficiency and do not overlap. RF and microwave applications are demonstrated based on the simulation and experimental results of low-voltage InGaP/GaAs HBT and high-voltage LDMOSFET power amplifiers. These switched-mode parallel-circuit Class E power amplifiers offer a new challenge for RF and microwave power amplification by providing high-efficiency operating conditions. (C) 2003 Wiley Periodicals, Inc.
parallel-circuit class e mode transmission-line load network switching time