Extended Resonance Circuits for the Design of Efficient RF Power Amplifiers, Low Phase Noise Oscillators and Low Cost Phased Arrays

Professor Amir Mortazawi,
EECS Department,
University of Michigan

ABSTRACT:
The power produced from solid-state devices drops drastically as their frequency of operation increases. Furthermore, most communications and radar systems require much more power than is available or expected from a single transistor. Power combining techniques are often used to increase the power level of microwave devices.

Extended Resonance circuit provides an efficient method of power combing solid state devices. It yields compact circuits suitable for the design of on chip power amplifiers. The theory and the design of narrow and broadband power amplifiers based on this technique will be discussed. Other applications of the extended resonance circuits for the design of low phase noise oscillators in RF transceivers and low cost phased arrays for direct satellite communications will be explored.

BIO:
Amir Mortazawi obtained PhD degrees in electrical engineering from the University of Texas at Austin, in 1990. Amir is the co-chair of IEEE MTT-16 committee on Phased Arrays and was the chair of the IEEE-MTTS Technical Program Committee on Active and Quasi-Optical Arrays. He was an Associate Editor for the IEEE Transactions on Antennas and Propagation from 1998-2001 and an Associate Editor for the IEEE Transactions on Microwave Theory and Techniques. Amir is the incoming Editor for the IEEE Transactions on Microwave Theory and Techniques. He was a secretary to the Administrative Committee of IEEE MTTS, and he is now an elected member of the IEEE MTTS AdCom. His research interests include millimeter-wave phased arrays, power amplifiers, PA linearization and frequency agile microwave circuits. Amir is a Fellow of IEEE.