Electromagnetic Diffraction Modeling and Simulation Presented By Prof. Dr. Levent Sevgi

EM diffraction is critical in many applications including antennas and propagation. Understanding and visualizing EM wave – object interaction is crucial in designing new antenna systems, in predicting path losses through complex propagation paths, etc. In order to do that wave pieces such as diffracted waves, Fringe waves, etc., should first be studied on canonical structures. Then, complex objects can be investigated by using HFA as well as numerical methods in hybrid form intelligently.

EM wave scattering from waves – objects interaction has long been investigated. Interesting wave phenomena, diffraction, occur when objects have sharp edges and tips. Methods known as High Frequency Asymptotics, such as Geometric optics (GO), Physical Optics, (PO), Geometrical Theory of Diffraction, (GTD), Uniform Theory of Diffraction (UTD), Physical Theory of Diffraction (PTD) and Theory of Edge Diffraction (TED) have been successfully applied to variety of EM problems. Recently, numerical methods, such as Finite Difference time Domain (FDTD), Method of Moments (MoM) and Finite Element Method (FEM) have also been used in modeling EM diffraction. These powerful methods, together with novel approaches, have shown to be successful not only in modeling EM diffraction but also in distinguishing wave pieces such as scattered waves, diffracted waves, Fringe waves, etc., which is very important in visualizing and understanding complex wave – object interaction.

This talk will review all these approaches, use recently developed EM virtual tools and present comparisons through canonical examples.

References
[1] L. Sevgi, Electromagnetic Modeling and Simulation, IEEE Press – John Wiley (EM Wave Series), NJ, Apr 2014.
[2] L. Sevgi, Complex Electromagnetic Problems and Numerical Simulation Approaches, IEEE Press – John Wiley & Sons, May 2003.
[3] G. Apaydın, L. Sevgi, Electromagnetic Diffraction modeling and simulation with MATLAB, ARTECH House, Norwood, MA, Feb 2021.
[4] C. Balanis, L. Sevgi, P. Ya Ufimtsev, “Fifty Years of High Frequency Asymptotics,” RFMiCAE, International Journal on RF and Microwave Computer-Aided Engineering, 23 (4), Jul 2013, pp.394–402.
[5] F. Hacıvelioğlu, L. Sevgi, P. Ya. Ufimtsev, “Electromagnetic Wave Scattering from a Wedge with Perfectly Reflecting Boundaries: Analysis of Asymptotic Techniques,” IEEE Antennas and Propagation Magazine, Vol. 53, No. 3, pp.232-253, Jun 2011.
[6] F. Hacıvelioğlu, M. A. Uslu, L. Sevgi, “A Matlab-based Virtual Tool for the Electromagnetic Wave Scattering from a Perfectly Reflecting Wedge”, IEEE Antennas and Propagation Magazine, 53 (6), Dec 2011, pp.234–243.
[7] G. Çakır, L. Sevgi, P. Ya. Ufimtsev, “FDTD Modeling of Electromagnetic Wave Scattering from a Wedge with Perfectly Reflecting Boundaries: Comparisons against Analytical Models and Calibration,” IEEE Trans. on Antennas and Propagat., 60 (7), Jul 2012, pp. 3336–3342.
[8] M. A. Uslu, L. Sevgi, “Matlab-based Virtual Wedge Scattering Tool for the Comparison of High Frequency Asymptotics and FDTD Method”, ACES Journal, 27 (9), 2012, pp.697–705.
[9] G. Apaydın, L. Sevgi, “Method of Moments (MoM) Modeling of Wave Propagation inside a Wedge Waveguide,” ACES Journal, 29 (8), 2014, pp.515–522.

Speaker(s): See Prof. Dr. Levent Sevgi’s website,

Agenda:
5:30pm: Networking and light refreshments;

6:00pm: Presentation;

7:00pm: Q&A and discussion;

Sheraton Syracuse University Hotel and Conference Center, 801 University Avenue, Syracuse, New York, United States, 13210