This book presents the application of the overlapping grids approach to solve chiral material problems using the FDFD method. Due to the two grids being used in the technique, we will name this method as Double-Grid Finite Difference Frequency-Domain (DG-FDFD) method. As a result of this new approach the electric and magnetic field components are defined at every node in the computation space. Thus, there is no need to perform averaging during the calculations as in the aforementioned FDFD technique [16]. We formulate general 3D frequency-domain numerical methods based on double-grid (DG-FDFD) approach for general bianisotropic materials. The validity of the derived formulations for different scattering problems has been shown by comparing the obtained results to exact and other solutions obtained using different numerical methods. Table of Contents: Introduction / Chiral Media / Basics of the Finite-Difference Frequency-Domain (FDFD) Method / The Double-Grid Finite-Difference Frequency-Domain (DG-FDFD) Method for Bianisotropic Medium / Scattering FromThree Dimensional Chiral Structures / ImprovingTime and Memory Efficiencies of FDFD Methods / Conclusions / Appendix A: Notations / Appendix B: Near to Far FieldTransformation

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Erdogan Alkan was born in Nigde, Turkey, in 1978. He received the B.S.E.E. degree from the Istanbul Technical University, Istanbul, Turkey, in 2000. He studied at Syracuse University, Syra[1]cuse, NY, where he received MSEE and Ph.D. degrees, in 2003 and 2009, respectively. During his graduate study he had worked as a research assistant in Herley Inc. Lancaster, PA, and PPC Inc., Syracuse, NY. His research focused on the development of the FDFD algorithm to obtain a radar cross-section of arbitrary shapes of homogeneous and inhomogeneous chiral materials. He has several publications in this area. Dr. Alkan is a highly skilled R&D Engineer and Adjunct Faculty with over 10 years of experience and theoretical background in RF and Microwave product development and electromagnetic simulations. He specializes in innovative solutions to electrical and electronic engineering, especially as they relate to simulation and fabrication of RF/Microwave electronics. His expertise further ex[1]tends into developing and designing a variety of products for broadband communication networks as well as wireless networks. Some of the designs include RF passives such as RF filters, equalizers, frequency selective attenuators, absorptive filters, power dividers, splitter transformers, surge protectors, and RF actives such as C-band high power pulsed amplifiers, pulsed-bias power supplies, self-terminating RF output ports, broadband CATV amplifiers, noise mitigation circuits and many more. He holds eight approved US, two Chinese patents and several pending applications. Department of Electrical Engineering in Northern Illinois University in 2007, where he is an assistant professor. His research interests include numerical analysis techniques (FDTD, FDFD, MoM), and microwaves and RF circuits analysis and design. Dr. Demir is a member of the Institute of Electrical and Electronics Engineers (IEEE) and the Applied Electromagnetics Society (ACES). He has authored and co-authored over 20 technical journal and conference papers. He has been serving as a reviewer for the Applied Computational Electromagnetics Society (ACES) Journal, and Transactions on Microwave Theory and Techniques.