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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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  • Diffraction of plane electromagnetic waves by a resistive half-screen for skew incidence 
    Umul, Yusuf Ziya (2020-01-01)
    The scattering process of electromagnetic plane waves by a resistive half-screen is investigated for oblique incidence. First of all, it is shown that the existing solution in the literature is not correct, because the ...
  • 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 plane waves by the interface between black and soft/hard semi-planes 
    Umul, Yusuf Ziya (Elsevier GMBH, 2012)
    A theory of scattering, based on the non-perturbation of the incident field, is developed for the black bodies. The method is applied to the diffraction problem of plane waves by an interface between the black and soft/hard ...
  • Diffraction of waves by a boundary between two half-planes with different resistivities 
    Umul, Yusuf Ziya (Optical Soc Amer, 2015-04-01)
    The solution of the diffraction problem of waves by a junction between two resistive half-screens is obtained by using the wedge diffraction field expression, introduced by Maliuzhinets [Ann. Phys. 461, 107 (1960)]. The ...
  • 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 ...
  • Diffraction of waves by a discontinuous edge contour 
    Umul, Yusuf Ziya (2020-03)
    An edge contour which is discontinuous is taken into account. The geometric optics and edge diffracted waves are obtained for the oblique incidence of a plane wave. The discontinuity in the geometry is expressed in terms ...
  • Diffraction of waves by a perfectly conducting half-plane between two dielectric media 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2014-01-01)
    The scattered fields by a perfectly conducting half-plane, located at the interface of two dielectric media, are investigated. The diffracted fields are defined with novel reflection and transmission coefficients that are ...
  • Diffraction of waves by a planar junction between perfectly absorbing and resistive sheets 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-04)
    The scattering of plane waves by a planar junction between perfectly absorbing and resistive half-planes is studied. The scattered geometrical optics fields are evaluated from the difference of the total geometrical optics ...
  • Diffraction of waves by a resistive half-plane 
    Umul, Yusuf Ziya (Elsevier Science Bv, 2014-07-15)
    The scattered waves by a resistive half-plane are investigated with defining reflection and transmission coefficients for the diffracted waves. The coefficients are determined according to suitable conditions that are ...
  • Diffraction of waves by a wedge residing between two different media 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-06)
    The scattering problem of plane waves by a perfectly electric conducting wedge, residing at the planar interface of two media with different electromagnetic properties, is investigated. The structure of the scattered ...
  • Diffraction of waves by a wedge with phase conjugate faces 
    Umul, Yusuf Ziya (Association for Scientific Research, 2011)
    The scattering process of waves by a wedge with phase conjugate faces is investigated with the aid of the modified diffraction theory of Kirchhoff. The scattering integral is evaluated asymptotically. The uniform diffracted ...
  • Edge diffraction in an anomalously reflecting half-plane 
    Umul, Yusuf Ziya (Springer, 2018-09)
    A half-plane, formed of anomalously reflecting metasurface, is taken into account. The layer is modeled by an impedance half-screen. In order to obtain the diffracted fields, the geometrical optics waves are evaluated as ...
  • 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. ...
  • Effect of the shadow geometry on diffraction 
    Umul, Yusuf Ziya (Optical Soc Amer, 2008-12)
    The effect of the scatterer surface on the shadow region is examined by using the surface integrals of the modified theory of physical optics. It is shown that the shadow geometry has a considerable effect on the structure ...
  • ELECTRIC CHARGES THAT BEHAVE AS MAGNETIC MONOPOLES 
    Umul, Yusuf Ziya (2010)
    The memristor theory of Chua [1] provides a connection with the charge and magnetic flux in an electric circuit. We define a similar relation for the electric and magnetic flux densities in electromagnetism. Such an attempt ...
  • Emission of matter waves by photons 
    Umul, Yusuf Ziya (Elsevier GMBH, 2012)
    A new hypothesis, based on the dualistic nature of matter and light, is proposed. The frequency shift of a photon creates an electron. The phenomenon is investigated according to the conservation laws of energy and momentum. ...
  • Equivalent functions for the Fresnel integral 
    Umul, Yusuf Ziya (Optical Soc Amer, 2005-10-17)
    Fresnel integral is modeled with three equivalent functions. The first function is derived by considering the sum of the first term of the Fresnel integral's asymptotic expansion {(F) over cap (x)} and an exponential ...
  • 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 ...
  • Excitation of electromagnetic waves by a discontinuous electric line source 
    Umul, Yusuf Ziya (Elsevier GMBH, 2018-09)
    The radiation process of electromagnetic waves is investigated when a discontinuity on an electric line source is created. Three cases are taken into account. In the first case, an abrupt discontinuity is formed on the ...