Comparative study of recent advances in power amplification devices and circuits for wireless communication infrastructure

This paper presents recent advances in power amplification devices and circuits with application to wireless communication infrastructure. A comparative analysis of the two leading technologies (LDMOS and GaN) is first presented. It is shown that GaN technology enables the use of power amplifiers circuits that requires harmonic loading at frequencies higher than 2 GHz. Then, power amplifiers classes including class D, E, and F are presented along with a thorough overview of recent achievements in terms of efficiency.