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Yazar "42699" için Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu listeleme

Yazar "42699" için Elektronik ve Haberleşme Mühendisliği Bölümü Yayın Koleksiyonu listeleme

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  • Extension of the maliuzhinets solution for the resistive half-plane 
    Umul, Yusuf Ziya (Wiley-Blackwell, 2012-03)
    The solution, put forward by Maliuzhinets for the impedance half-plane, is extended for the diffraction problem of plane waves by a resistive half-plane. With this aim, the Wiener-Hopf solution of the same problem is taken ...
  • 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 ...
  • Field correlations of laser arrays in atmospheric turbulence 
    Baykal, Yahya (Optical Soc Amer, 2014-03-01)
    Correlations of the fields at the receiver plane are evaluated after a symmetrical radial laser array beam incident field propagates in a turbulent atmosphere. The laser array configuration is composed of a number 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 ...
  • Fringe waves radiated by a half-plane for the boundary conditions of Neumann 
    Umul, Yusuf Ziya (Springer, 2008-12)
    The fringe waves of the physical theory of diffraction are obtained in terms of Fresnel integrals for a half-plane satisfying the Neumann boundary condition. The approximate expressions of the radiated waves are also ...
  • General expression of the diffracted waves by a half-screen with generalized impedance boundary conditions 
    Umul, Yusuf Ziya (Elsevier GMBH, Urban & Fischer Verlag, 2019)
    The diffraction process of plane waves by a half-screen with generalized impedance boundary conditions is studied. Firstly, the scattered geometrical optics waves are obtained by subtracting the incident field from the ...
  • General formulation of the edge-diffracted paraxial waves 
    Umul, Yusuf Ziya (Elsevier Science, 2009-09)
    A general formula for edge-diffracted paraxial waves is derived in terms of the Fourier integral transform. It is observed that the scattered paraxial wave can be divided into components of the geometrical optics and ...
  • General formulation of the scattered matter waves by a quantum shutter 
    Umul, Yusuf Z. (2009-01)
    The scattering process of matter waves by a quantum shutter is investigated by using the spectrum integral representation. The scattered fields are expressed in terms of the Fresnel function. It is shown that the obtained ...
  • 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 representation of the edge diffracted waves along the ray path of the transition region 
    Umul, Yusuf Ziya (Optical Soc Amer, 2008-09)
    The expression of the edge diffracted fields, in terms of the Fresnel integral, is transformed into a path integral. The obtained integral considers the integration of the incident field along the ray path of the transition ...
  • 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 plane waves with an impedance half-plane in an anisotropic medium 
    Umul, Yusuf Ziya (2020-03-10)
    The diffraction process of electromagnetic plane waves by an impedance half-plane in anisotropic medium is investigated. In this case, the permittivity of the space is expressed in terms of a tensor. The incident wave is ...
  • Interaction of electromagnetic waves by a cylindrical parabolic mesh reflector 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    A cylindrical parabolic reflector, composed of mesh grid, is modeled by a resistive surface. The analysis of the scattered waves is performed by the physical optics integral, which was developed for resistive surfaces. The ...
  • 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. ...
  • Interaction of plane waves by a half-screen between two different media 
    Umul, Yusuf Ziya (Springer, 2018-02)
    The diffraction process of plane waves by a perfectly electric conducting half-screen, residing at a planar junction between two different media, is investigated. The scattered geometrical optics waves are evaluated by ...
  • Kinetic energy based relativistic first order wave equations 
    Umul, Yusuf Ziya (Elsevier GMBH, 2019)
    A relativistic wave equation is derived for spin-1/2 particles. The energy relation is taken into account with respect to the kinetic energy term. Two first order differential equations are obtained from the kinetic energy ...
  • Kinetic energy based relativistic wave equation 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-11)
    The Schrödinger equation is based on a Hamiltonian, which is the sum of kinetic and potential energies. The energy term, in the relativistic energy-momentum relation, is divided into its kinetic and rest energy components ...
  • Mass gain and loss of non-relativistic electrons in photon-electron interactions 
    Umul, Yusuf Ziya (Springer, 2011-06)
    It is shown that the electrons gain mass as their non-relativistic velocities increase. This process is realized by the absorption of photons in the colliding process. In an inverse manner, they loss their mass when they ...
  • Modified diffraction theory of Kirchhoff 
    Umul, Yusuf Ziya (Optical Soc Amer, 2008-08)
    The diffraction theory of Kirchhoff is reinterpreted and a new form of a surface diffraction integral is developed by using the axioms of the modified theory of physical optics, which leads to the exact scattered fields ...
  • Modified theory of physical optics 
    Umul, Yusuf Ziya (Optical Soc Amer, 2004-10-04)
    A new procedure for calculating the scattered fields from a perfectly conducting body is introduced. The method is defined by considering three assumptions. The reflection angle is taken as a function of integral variables, ...