Power amplifiers are one of the fundamental blocks of the transceiver chain and are usually the last element before the antenna, therefore they have strong impact on the overall performance of the communication system. Nowadays, wireless communication systems often employ complex modulation schemes. This kind of modulation often involves high PAPR signals, meaning that the working power levels of the power amplifiers are not constant and are often far from saturation, where the amplifier has the best efficiency. Therefore it is essential to explore amplifier topologies that maintain high efficiency and linearity even in back-off. Doherty power amplifiers address this challenge by combining two devices (main and auxiliary) through a load modulation network.