High efficiency power amplifiers for 5G wireless communications

We present several design techniques to achieve high efficiency and linear power amplifiers in the millimeter-wave frequencies. We will first review the performance of power amplifiers in different semiconductor process technologies at millimeter-wave frequencies. We will discuss the design, implementation and performance of stacked-FET power amplifiers, Doherty power amplifiers and linearization techniques to achieve high efficiency and linearity in millimeter-wave frequencies. The presented power amplifiers have applications in the 5G wireless communications.