High Performance RF Doherty Power Amplifier for Future Wireless Communication Applications—Review, Challenges, and Solutions

In this paper, systematic review of Doherty power amplifier for future wireless communication applications is presented. The Doherty power amplifier works on the principle basic operation and design of Doherty power amplifier is presented. The Doherty power amplifier is mainly facing limited bandwidth operation while maintaining the desired efficiency and linearity. The design challenges highlighting the bandwidth limiting factors are discussed in detail. The latest research trends focused on improving the performance of Doherty amplifier using various architectures and their main challenges as well as solutions are addressed. The latest techniques are reviewed to enhance the performance of Doherty power amplifier in terms of peak, back-off efficiency, and bandwidth along with maintaining the linearity to make it most suitable and preferable candidate for future wireless communication applications.