This presentation will focus on the power amplifiers for next generation wireless communication transmitters. The PA/transmitter requirements for the next generation systems will be first introduced. Based on these requirements advanced solutions to the conflicting needs for both efficiency and linearity will be discussed. LINC (LInear amplification using Nonlinear Component), Sigma-delta based polar transmitters, EER (Envelop Elimination and Restoration) amplifiers, and Doherty amplifiers will be included in the techniques to be considered. This presentation is based on the work carried out at Postech.

Dr. Bumman Kim is the Chong Yul Lee Professor for the Department of Electrical Engineering and is Director of the Microwave Application Research Center at Pohang University of Science and Technology. He has a Ph.D. in Electrical Engineering from Carnegie-Mellon University, an M.S.in Electrical Engineering from the University of Texas and a B.S. in Electronics Engineering from Seoul National University. His work has concentrated on the field of microwave and millimeter-wave circuits and devices. He has developed linear power amplifiers (LPAs) and transmitters for mobile communication applications including LPAs based on feed-forwarding techniques, pre-distortion, base-band error correction architectures and most recently Doherty amplifiers. He had worked for the GTE Labs and the Central Research Labs of Texas Instruments. At TI, his research was devoted to the monolithic microwave integrated circuits (MMICs) and devices. He pioneered the development of power MESFETs at millimeter wave frequencies. He built the first MMIC at mm-wave frequency and the first semiconductor based oscillator operating at frequencies over 100 GHz.

Dr. Kim is a fellow of IET and IEEE. He is a member of Korean Academy of Science and Technology and also a member of the National Academy of Engineering of Korea. He was a distinguished microwave lecturer (2005 _ 2007) and AdCom member of the MTT society of the IEEE. He served as a dean of academic affairs at Postech.