Prof. Levent Sevgi

This IEEE AP-S DL talk discusses guided wave theory (GWT). This theory is important in teaching EM. In most of these problems such as transmission lines, 2D parallel plate waveguides, and 3D rectangular and/or circular cross-section waveguides analytical exact solutions are known. This is specifically important in (I) understanding the problem and gaining physical insight, (ii) generating reference data for measurements and numerical simulations. An undergrad-level GWT can be taught by first decomposing Maxwell equations into transverse and longitudinal components and discussing the Sturm-Liouville equation in 1D; establishing characteristic relations between source-free (homogeneous) and source-driven (inhomogeneous) representations. Then, orthogonality and completeness can be summarized. As a canonical structure, mathematical details of a 2D parallel plate waveguide with non-penetrable boundaries can be given. The formation of the longitudinal correlation function and the steps of the eigenvalue extraction procedure can be explained. A few other guiding problems may also be included. At the grad level, the Ray-mode representations inside the 2D parallel plate waveguide may be taught. Details of alternative integral representations and derivations by contour deformations, residue series, etc., on various complex planes can be discussed. MATLAB-based virtual tool RAYMODE can be used to visualize effects of rays, and modes individually and in a hybrid form on various user-specified scenarios.

Biography:

Prof. Dr. Levent Sevgi is a Fellow of the IEEE (since 2009) and the recipient of the IEEE APS Chen-To Tai Distinguished Educator Award (2021). He received his B. Eng., M. Eng., and PhD degrees in Electronic Engineering from Istanbul Technical University (ITU) in 1982, 1984 and 1990, respectively. In 1987, while working on his PhD, he was awarded a fellowship that allowed him to work with Prof. L. B. Felsen at Weber Research Institute / New York Polytechnic University York for two years. His work at the Polytechnic concerned the propagation phenomena in non-homogeneous open and closed waveguides. He was with Istanbul Technical University, TUBITAK-MRC, Information Technologies Research Institute, Weber Research Institute / NY Polytechnic University, Scientific Research Group - Raytheon Systems Canada, Center for Defense Studies, ITUV-SAM and the University of Massachusetts, Lowell (UML) MA/USA full-time faculty DOGUS University with Istanbul OKAN University, and Istanbul ATLAS University. IEEE AP-S Distinguished Lecturer. Chair of IEEE AP-S DL Committee. IEEE AP-S AdCom and IEEE AP-S Field Award Committee. Writer/editor for IEEE AP Magazine, member of IEEE AP-S Education Committee, Several editorial boards (EB) of other journals/magazines, IEEE AP Magazine, Wiley’s International Journal of RFMiCAE. Founding chair EMC TURKIYE International Conferences (www.emcturkiye.org). He has been involved with complex electromagnetic problems & complex communication and radar systems for nearly three decades. His research study has focused on propagation in complex environments; electromagnetic scattering and diffraction; RCS prediction and reduction; EMC/EMI modeling, simulation, tests, and measurements; multi-sensor integrated wide area surveillance systems; surface wave HF radars; analytical and numerical methods in electromagnetics; FDTD, TLM, FEM, SSPE, and MoM techniques and their applications; bio-electromagnetics. He is also interested in novel approaches in engineering education, teaching electromagnetics via virtual tools. He teaches popular science lectures such as Science, Technology & Society.
He has given dozens of seminars, invited/keynote talks, and organized/presented several tutorials, training sessions, and short courses from half-day to three days in universities/institutes all around the World. He has published more than a dozen special issues/sections in many journals as a guest editor and/or a co-guest editor. He has published many books/book chapters in English and Turkish, over 180 journal/magazine papers/tutorials, and attended more than 100 international conferences/symposiums. His three books Complex Electromagnetic Problems and Numerical Simulation Approaches, Electromagnetic Modeling and Simulation, and Radiowave Propagation and Parabolic Equation Modeling were published by the IEEE Press - WILEY in 2003, 2014, and 2017, respectively. His fourth and fifth books, A Practical Guide to EMC Engineering (Sep 2017) and Diffraction Modeling & Simulation with MATLAB (Feb 2021) published by ARTECH HOUSE.

Email:

Address:United States