A review of recent development on digital transmitters with integrated GaN switch-mode amplifiers

GaN integrated switch-mode power amplifier with high output power, fast and efficient switching characteristic has been considered as a very suitable technology for implementing advanced digital radio transmitter. It is featured of energy-efficient and re-configurable operation. This paper reviews the recently reported works in this promising research topic. Key technical challenges on the device technology, modeling, and circuit designs are summarized. Future development trend is discussed.