Power Amplifier Circuit Techniques for 4/5G Mobile Phone Terminals

Since the launch of the fifth-generation mobile standard, there is an ever-increasing number of frequency bands, wider signal bandwidths (>100MHz), and higher required output power levels (PC2/HPUE mode) to support higher data rates and throughput. With these new standards, the configuration of the RF front end becomes increasingly more complex. To address these requirements, the PA must simultaneously meet wideband characteristics and high output power, with minimal power consumption. In this presentation, high-efficiency integrated PA design techniques and architectures, such as envelope tracking amplifiers and Doherty topologies, targeting mobile applications are described in terms of their theoretical limits, recent advancements, and state-of-the art performance. Furthermore, this talk details the design challenges with integrated multi-band and multi-mode PA modules that support multiple communication standards.