Design Techniques for Doherty Power Amplifiers to Enable Deep Backoff Efficiency Enhancement and Wide Modulation Bandwidth

mm-Wave 5G NR OFDM signals can have up to 12dB PAPR and 2000MHz channel bandwidth, posing significant linearity, efficiency, and speed challenges for PA design. Doherty PA architecture has emerged as a promising solution to overcome these challenges. Beyond component-level demonstrations, Doherty PAs have also been recently integrated into mm-wave phased array front-ends. This talk will introduce recent advances in silicon-based Doherty PAs. The talk will start with an overview of key design considerations for Doherty PAs, followed by an in-depth discussion of design techniques to enable deep backoff efficiency enhancement and modulation bandwidth extension.