Fiziksel kırınım teorisi ile büyük plakalarla modellenmiş iletken ve empedans cisimlerin radar kesit alanı hesaplanması

Calculation of Radar Cross Section (RCS) of arbitrary bodies using PhysicalOptics (PO) Theory and Physical Theory of Diffraction (PTD)is considered. Forbodies with impedance surface boundary condition, only PO is used. Analyticalapproach to PO integral is used to achieve faster computations. A computerprogram has been developed in Fortran in order to calculate the Radar CrossSection (RCS). Arbitrary shape is modeled as triangular facets of any area bythe help of graphical tools. Given the triangular meshed model of an arbitrarybody, Physical Optics(PO) surface integral is numerically evaluated over thewhole surface. There is no limitation on the size of the triangles, as soon as thetotal surface does not retire from the original one.Shadowing algorithm has been used in order to have more accurate solutions.Additionally, flash points of PO are visualized over the surface of targets, hencelocal nature of high-frequency phenomena is proved.Induced surface currents, edge currents and RCS have been calculated forsome basic shapes and the fuel tank model of F-16 airplanes. Induced surfaceiiicurrents have been visualized over the surface of the particular targets usingMatlab.Keywords: Physical Optics (PO), RCS, Radar Cross Section, Impedance Sur-face, Flat Plate Modeling, Triangular Flat Plates, Physical Theory of Diffraction(PTD).iv