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Konu "Physical Optics" için listeleme

Konu "Physical Optics" için listeleme

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  • A hybrid Maliuzhinets/PO method for diffraction problems by impedance wedges 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2011-09-01)
    The solution of Maliuzhinets of the diffraction problem of waves by an impedance wedge is transformed into a physical optics integral. The resultant expression is suitable for the investigation of various diffraction ...
  • Apertured paraxial Bessel beams 
    Umul, Yusuf Ziya (Optical Soc Amer, 2010-03)
    The paraxial Bessel beam is obtained by applying an approximation in the wavenumbers. The scattering of the beams by a circular aperture in an absorbing screen is investigated. The scattered fields are expressed in terms ...
  • Application of the physical optics method to impedance wedge diffraction problem 
    Küçükkara, Nebahat Yağmur (2021)
    Bu tezde, empedans yarı düzlemi ile saçılan elektrik alanı ve mükemmel bir elektrik iletken (PEC) kama, fiziksel optik (PO) yöntemi kullanılarak incelenecektir. Kama kırınım problemi için fiziksel optik yöntemi genişletilmiştir. ...
  • Boundary diffraction wave theory of resistive surfaces with edge discontinuities 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2011-10-15)
    The line integral of the boundary diffraction wave theory is derived by considering the exact diffracted fields of a resistive half-plane. The line integral is generalized for arbitrary resistive surface with edge ...
  • Diffraction of cylindrical waves by a perfectly conducting half-screen: a modified theory of physical optics solution 
    Umul, Yusuf Ziya (Wiley-Blackwell, 2016-08)
    The scattering problem of waves, radiated by a line source, is investigated by the method of modified theory of physical optics. The solution is obtained for both of the Dirichlet and Neumann boundary conditions. Two ...
  • Diffraction of electromagnetic waves by impedance slits and strips 
    Coşkun, Galip Çağlar (2008-06-11)
    In this thesis, diffraction process of electromagnetic waves by strips and slits will be examined by using the methods of the physical optics (PO) and modified theory of physical optics (MTPO) that have impedance boundary ...
  • Diffraction of evanescent plane waves by a resistive half-plane 
    Umul, Yusuf Ziya (Optical Soc Amer, 2007-10)
    Diffraction of evanescent plane waves by a resistive half-plane is examined. The scattering integrals are constructed with the modified theory of physical optics. These integrals are evaluated uniformly by using an unusual ...
  • Diffraction of homogeneous and inhomogeneous plane waves by a planar junction between perfectly conducting and impedance half-planes 
    Umul, Yusuf Ziya (Optical Soc Amer, 2007-01)
    The problem of diffraction of homogeneous and inhomogeneous plane waves at the discontinuity formed by perfectly conducting and impedance half-planes is examined by the method of modified theory of physical optics (MTPO). ...
  • Diffraction of plane waves by a black wedge 
    Umul, Yusuf Ziya (Elsevier Science, 2010-02)
    The scattering of plane waves by a black wedge is examined. Two methods are considered for the solution of the problem. A closed-form series solution is derived by performing the technique of the separation of variables ...
  • Diffraction of waves by a conductive half-plane 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    The scattering process of plane waves by a conductive half-plane is investigated. The scattered geometrical optics waves are obtained by subtracting the incident field from the total geometrical optics waves. The physical ...
  • Edge-dislocation waves in the diffraction process by an impedance half-plane 
    Umul, Yusuf Ziya (Optical Soc Amer, 2007-02)
    Edge-dislocation waves, created in the diffraction of plane waves by an impedance half-plane, are examined by the method of modified theory of physical optics. The integrals, obtained by a related technique, are decomposed ...
  • Effect of the shadow geometry in wedge diffraction 
    Umul, Yusuf Ziya (Optical Soc Amer, 2009-09-01)
    The surface integrals of the modified theory of physical optics are divided into two parts for diffraction by a wedge. Each integral represents the incident or reflected field scattered by one of the faces of the wedge. ...
  • Exact form of the physical optics integral 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    The exact structure of the physical optics integral is obtained. With this aim, the rigorous solution of the diffraction problem of waves by a perfectly conducting half-plane is considered. The Fresnel integrals of the ...
  • Fictitious diffracted waves in the diffraction theory of Kirchhoff 
    Umul, Yusuf Ziya (Optical Soc Amer, 2010-01)
    The diffraction theory of Kirchhoff is applied to the semi-infinite aperture of a black half-screen. The derivative of the spherical Green's function is taken into account without any approximation. The uniformly evaluated ...
  • Fringe waves in an impedance half-plane 
    Başdemir, Hüsnü Deniz (E M W Publishing, 2013)
    The uniform expressions of scalar fringe waves which are based on the physical theory of diffraction (PTD) were obtained for the impedance half plane in terms of the Fresnel integrals. Asymptotic and uniform forms of the ...
  • Fringe waves in wedge diffraction 
    Umul, Yusuf Ziya (Elsevier GMBH, 2012)
    Explicit expressions for the non-uniform currents of the physical theory of diffraction are derived in terms of Fresnel functions for wedge diffraction by taking into account the surface integrals of the modified theory ...
  • GTD diffraction coefficient for higher order edge diffracted fields 
    Küçükoğuz, Celal (2005-06)
    Diffraction is the change in the direction of a wave at the edges of the objects. Multiple diffraction occurs when there are two ör more edges in öne ör more objects in same geometry. If there are öne ör more interaction ...
  • Improved equivalent source theory 
    Umul, Yusuf Ziya (Optical Society of America, 2009-08)
    The equivalent source theorem, which is an important technique in the study of radiation and scattering by apertures, is improved by using the two axioms of the modified theory of physical optics. The method is applied to ...
  • Integral theory of diffraction for material junctions 
    Umul, Yusuf Ziya (Elsevier GMBH, 2017)
    A new approach to the scattering problem of waves by junctions is developed with the aid of the modified theory of physical optics (MTPO). The relation between the fundamental MTPO integral and the Fresnel function is given ...
  • Interaction of electromagnetic waves with a resistive half-plane 
    Umul, Yusuf Ziya (Springer France, 2016-06)
    The interaction process of electromagnetic waves by a resistive half-plane is investigated. The scattered geometrical optics fields are obtained by subtracting the incident field from the total geometrical optics waves. ...