This paper presents a novel class-F power amplifiers for mobile applications in which the need for an extra filtering section is eliminated with a proper harmonic tuning structure. Two class-F power amplifiers are presented (900 MHz and 1800MHz bands). The 900 MHz amplifier is able to deliver 38.6 dBm with a PAE of 80.5 % and a total harmonic distortion of 1.2 %. The 1800 MHZ delivers 38.8 dBm and has a PAE of 75%
Gilasgar, M., Barlabe, A., Pradell, L. Highly efficient class-F RF power amplifiers with very low distortion. "Radio Science Bulletin", Desembre 2013, núm. 347, p. 21-31.