Abstract

AbstractThis chapter presents design and analysis of high efficiency high power Class-F microwave solid-state amplifiers. Class-F power amplifier needs large number of resonators for harmonic impedance matching to produce non-overlapping device voltage and current waveforms for providing high DC to RF efficiency. Mathematical expressions for maximum output power and power added efficiency of Class-F amplifier for a given device are derived. Broadband performance of Class-F power amplifiers is limited due to requirement of short and open circuit impedances for large number of harmonic frequencies. Various types of Class-F amplifiers such as continuous Class-F and extended continuous Class-F amplifiers are discussed for achieving broadband performance with predicted compromise of output RF power and efficiency.

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