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Class-F and inverse class-F load circuits that can be treated up to arbitrary harmonics have been presented. The class-F and inverse class-F load circuits are designed so that influence of parasitic elements at a transistor is compensated. By using distributed circuit elements, the class-F and inverse class-F amplifier can operate at C-band. The design method mainly for the inverse class-F load circuit is described. Using ideal transmission line model, a designed inverse class-F considering up to the fifth order harmonics exhibits power added efficiency of about 80% in simulation.
Date of Conference: 12-13 May 2011