Doherty power amplifier with cascaded peaking cells

Abstract

Abstract The Doherty power amplifier (DPA) with cascaded peaking cells is reported.The auxiliary peaking cell at the input of the main peaking cell is employed to enhance the efficiency and linearity of DPA. For the experimental validation, the main DPA and an auxiliary peaking cell are designed using Si LDMOSFETs and a GaN HEMT, respectively. From the measured results, the power‐added efficiency is increased at a 6‐dB back‐off power and the adjacent channel leakage ratio is enhanced over a whole output power range. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:208–211, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25682