The first part of my talk will concentrate on the development of tunable RF circuits based on thin film ferroelectric materials. Central to this effort is the use of barium strontium titanate (BST) thin films. BST is a low loss, high dielectric constant non-linear dielectric material. The electric field dependence of BST permittivity allows fabrication of varactors for the design of tunable RF and microwave circuits. Several applications of high Q varactors on the design of tunable filters, novel phased arrays and predistortion linearizer circuits will be presented.

The recent work will also be introduced on the design of a wideband mm-wave dual polarized/dual scan electronically steered arrays and broadband power amplifiers based on the Extended Resonance circuit topology.

In 1990, he joined the University of Central Florida, Orlando, FL, as an Assistant Professor where he was promoted to Associate Professor in 1995. In August of 1998, he joined the North Carolina State University as an Associate Professor of Electrical Engineering. In Fall 2001, he joined the University of Michigan, Ann Arbor as an Associate Professor. Mortazawi is co-chair of IEEE MTT-16 committee Phased Arrays and chair of the IEEE-MTTSTechnical Program Committee on Active and Quasi-Optical Arrays. He was an Associate Editor for the IEEE Transactions on Antennas and Propagation from 1998-2001. Mortazawi's research interests include millimeter-wave power combining oscillators and amplifiers, quasi-optical techniques, frequency agile materials and nonlinear analysis of microwave circuits.