Electromagnetic scattered field analysis of 2D wedge geometries with HFA techniques and FDTD method

In this thesis, electromagnetic scattered field analysis of two dimensional non-penetrable wedge geometry have been investigated with both high frequency asymptotic techniques (HFA) and finite difference time domain (FDTD) method.Among HFA techniques, Physical optics (PO), Physical theory of diffraction (PTD), Unified theory of diffraction (UTD), Parabolic equation (PE), Exact series and Exact integral methods are applied to inspect electromagnetic scattering behavior of two dimensional non-penetrable wedge geometry analytically.As a numerical technique, finite difference time domain (FDTD) method and the important aspects in its implementation are explained briefly. Also, absorbing boundary conditions and modeling issues are investigated. Meshing algorithm is developed to reduce staircase modeling errors which is formed by the application of standard Yee algorithm. In order to show the qualification of FDTD method, some examples are presented with HFA results.A novel Matlab based softwares WEDGE GUI and WEDGE FDTD GUI are also presented with thesis. The former was developed to analyze two dimensional perfect electric conductor (PEC) wedge geometries with various HFA methods. The latter was developed to analyze same geometry with finite difference time domain (FDTD) method. Source codes of these programs can be found in the CD given with this thesis.