Power Amplifiers for Energy Efficient and Wideband Mobile Communication Applications

The need to improve capacity and energy consumption in existing and future mobile communication systems is driving intense research on how to improve the bandwidth and efficiency of mobile and base station transmitters. This presentation will give an overview of the recent research performed at Chalmers University in this area, ranging from new power amplifier circuits to advanced signal processing and system level analysis techniques. A variety of innovative circuit design techniques will thereby be presented, including wideband and efficient Doherty-, outphasing-, and varactor based dynamic load modulation power amplifier architectures. Different signal processing techniques tailored for digital pre-distortion linearization of these architectures will also be outlined, including new measurement techniques for real-time adaptation of such methods. Finally, a comprehensive method for system level analysis of antenna array transmitters will be presented and its potential for use in development of 5G and phased array radar systems will be summarized.