Asymptotic Methods, Inverse-Design, and Optimization Techniques for Electromagnetics

Abstract

This talk focuses on high-frequency ray techniques for efficiently predicting electromagnetic scattering from electrically large metallic objects. It introduces heuristic diffraction coefficients proposed for modeling anisotropic media. The talk also describes inverse-design strategies for shaped reflector antennas with surface-curvature constraints for space-based applications. Furthermore, a new Hessian-based optimization framework for accelerating the antenna design process is presented. This second-order derivative-based technique has been shown to exhibit superior convergence and requires fewer function evaluations compared to existing optimization algorithms. The accuracy and validity of the proposed methods are verified through various application example.

Bio

He received the B.E. degree in electronics and communication from Madras University, India, in 2004, and the M.S. in microwave engineering from Technische Universität Hamburg, Germany in 2009 and Ph.D. in degrees in computational electromagnetics from the University of Siena, Italy, in 2015. He was a Researcher at Fraunhofer Institute for High Frequency Physics and Radar Techniques FHR, Germany, from 2009 to 2015. He was then a Graduate Research Associate in the Department of Information Engineering and Mathematics, University of Siena. He was a solver developer with Altair Engineering Inc, working on the high frequency solvers in FEKO electromagnetic simulation software, in 2015. In 2017, he joined the Computational Electromagnetics and Antennas Research Laboratory, Department of Electrical Engineering, The Pennsylvania State University, as a Postdoctoral Scholar under the advisement of Prof. Douglas H. Werner. He is currently an Assistant Research Professor in the Department of Electrical Engineering, Penn State University. Dr. Balasubramanian has served as a session chair for several IEEE APS-URSI and ACES Symposiums. He is also a reviewer for several journals including IEEE TAP, IEEE AWPL, IEEE AP Magazine, IEEE OJAP, etc. is currently serving as the Guest Editors of a Special Section for IEEE OJAP.