Browsing by Keywords "Electromagnetic scattering"
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Accurate solutions of scattering problems involving lowcontrast dielectric objects with surface integral equations
(2007)We present the stabilization of the surface integral equations for accurate solutions of scattering problems involving lowcontrast dielectric objects. Unlike volume formulations, conventional surface formulations fail to ... 
Analysis of an arbitraryprofile, cylindrical, impedance reflector surface illuminated by an Epolarized complex line source beam
(VSP BV, 2014)Electromagnetic scattering from a cylindrical reflector surface having an arbitrary conic section profile is studied. We assumed an electrically thin layer antenna illuminated by a complex line source in Epolarization ... 
Analysis of the ellipticprofile cylindrical reflector with a nonuniform resistivity using the complex source and dualseries approach: Hpolarization case
(Springer, 2013)An ellipticprofile reflector with varying resistivity is analyzed under the illumination by an Hpolarized beam generated by a complexsourcepoint (CSP) feed. The emphasis is done on the focusing ability that is potentially ... 
Characteristic basis function method for solving electromagnetic scattering problems over rough terrain profiles
(IEEE, 201031)A computationally efficient algorithm, which combines the characteristic basis function method (CBFM), the physical optics (PO) approach (when applicable) with the forward backward method (FBM), is applied for the investigation ... 
Computational analysis of complicated metamaterial structures using MLFMA and nested preconditioners
(2007)We consider accurate solution of scattering problems involving complicated metamaterial (MM) structures consisting of thin wires and splitring resonators. The scattering problems are formulated by the electricfield ... 
Computational study of scattering from healthy and diseased red blood cells
(Society of Photo Optical Instrumentation Engineers, 20100805)We present a comparative study of scattering from healthy red blood cells (RBCs) and diseased RBCs with deformed shapes. Scattering problems involving threedimensional RBCs are formulated accurately with the electric and ... 
An efficient and accurate technique for the incidentwave excitations in the FDTD method
(Institute of Electrical and Electronics Engineers, 199806)An efficient technique to improve the accuracy of the finitedifference timedomain (FDTD) solutions employing incidentwave excitations is developed. In the separatefield formulation of the FDTD method, any incident wave ... 
Efficient parallelization of the multilevel fast multipole algorithm for the solution of largescale scattering problems
(Institute of Electrical and Electronics Engineers, 200808)We present fast and accurate solutions of largescale scattering problems involving threedimensional closed conductors with arbitrary shapes using the multilevel fast multipole algorithm (MLFMA). With an efficient ... 
Electromagnetic scattering of THz waves from a microsize graphenesandwiched thin dielectric strip
(IEEE Computer Society, 2018)Twodimensional (2D) scattering of the Hpolarized plane wave by a composite flat material strip is investigated. It is made as graphenedielectricgraphene sandwichlike structure which is placed in the free space. Our ... 
Electromagnetic scattering solution of conducting strips in layered media using the fast multipole method
(Institute of Electrical and Electronics Engineers, 199608)The fast multipole method (FMM) is applied to the solution of the electromagnetic scattering problems in layered media for the first time. This is achieved by using closedform expressions for the spatialdomain Green's ... 
Focusing Ability of a Microsize GrapheneBased Cylindrical Reflector in the THz Range Illuminated by Electromagnetic Plane Wave
(IEEE Computer Society, 2016)The scattering of the Hpolarized plane wave by a twodimensional (2D) parabolic reflector made of graphene placed in the free space is simulated by using the Method of Analytical Regularization (MAR) technique. The total ... 
Incomplete LU preconditioning with the multilevel fast multipole algorithm for electromagnetic scattering
(Society for Industrial and Applied Mathematics, 2007)Iterative solution of largescale scattering problems in computational electromagnetics with the multilevel fast multipole algorithm (MLFMA) requires strong preconditioners, especially for the electricfield integral ... 
Largescale solutions of electromagnetics problems using the multilevel fast multipole algorithm and physical optics
(Bilkent University, 201504)Integral equations provide fullwave (accurate) solutions of Helmholtztype electromagnetics problems. The multilevel fast multipole algorithm (MLFMA) discretizes the equations and solves them numerically with O(NLogN) ... 
The method of regularization and its application to some EM problems
(Springer, 2000)The regularization of the integral equations for the solution of electromagnetic problems is discussed. The technique includes a semianalytic inversion of the integral operator resulting in equation of the Fredholm second ... 
ParallelMLFMA solution of CFIE discretized with tens of millions of unknowns
(2007)We consider the solution of large scattering problems in electromagnetics involving threedimensional arbitrary geometries with closed surfaces. The problems are formulated accurately with the combinedfield integral ... 
Plasmon and grid resonances in the electromagnetic scattering by finite grids of silver nanowires
(2010)The problem of the Hpolarized wave scattering by finite chains of circular nanowires is considered. A twodimensional diffraction problem with rigorous boundary conditions is solved by partial separations of variables ... 
POMLFMA hybrid technique for the solution of electromagnetic scattering problems involving complex targets
(2007)The multilevel fast multipole algorithm (MLFMA) is a powerful tool for efficient and accurate solutions of electromagnetic scattering problems involving large and complicated structures. On the other hand, it is still ... 
Radar crosssection study of cylindrical cavitybacked apertures with outer or inner material coating: the case of Hpolarization
(Institute of Electrical and Electronics Engineers, 199505)A dualseriesbased solution is obtained for the scattering of an Hpolarized plane wave from a slitted infinite circular cylinder coated with absorbing material from inside or outside. For both cases, numerical results ... 
Resonances in the electromagnetic scattering by very large finiteperiodic grids of circular dielectric wires
(IEEE Computer Society, 2010)Diffraction of plane waves by infinite gratings is a classical research topic in the scattering theory. Using the Floquet theorem, one can reduce the infinite grating problem to the oneperiod problem. A characteristic ... 
Rigorous solutions of electromagnetic problems involving hundreds of millions of unknowns
(IEEE, 2011)Accurate simulations of reallife electromagnetic problems with integral equations require the solution of dense matrix equations involving millions of unknowns. Solutions of these extremely large problems cannot be easily ...