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. 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. Interesting wave phenomena, diffraction, occur when objects have sharp edges and tips. Then, complex objects can be investigated by using HFA as well as numerical methods in hybrid form intelligently.ĮM wave scattering from waves – objects interaction has long been investigated. In order to do that wave pieces such as diffracted waves, Fringe waves, etc., should first be studied on canonical structures. Understanding and visualizing EM wave – object interaction is crucial in designing new antenna systems, in predicting path losses through complex propagation paths, etc. Electromagnetic Diffraction Modeling and SimulationĮM diffraction is critical in many applications including antennas and propagation.
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