From 1976 to 1983, he was a Research and Development Engineer with Bharat Electronics Ltd., Ghaziabad, India, where he developed microwave communications equipment. In 1988, he joined the Electrical Engineering Department, University of NebraskaLincoln, where he served as the Blackman and Lederer Professor. Since 2003, he has been a Professor of electrical engineering with The Pennsylvania State University. He has coauthored 140 journal papers and over 300 conference publications. His current research interests include radar detection of mines and IEDs, harmonic and nonlinear radar, noise radar, cognitive radar, medical radar, quantum radar, radar networks, and compressive sensing.,Dr. Narayanan currently serves as a member of the IEEE Committee on Ultrawideband Radar Standards Development. He is the recipient of the 2017 IEEE Warren White Award for Excellence in Radar Engineering. He is also Fellow of the SPIE and the IETE.