Browsing by Keywords "Electromagnetic scattering"
Now showing items 2140 of 43

A model with electric fields for the inclusion of mutual coupling effects in the MIMO channel
(IEEE, 2007)Multiple input multiple output (MIMO) wireless communication systems have been a focus of interest, due to their ability to increase the capacity in rich scattering environments by using multielement antenna arrays both ... 
Multilevel physical optics algorithm for fast solution of scattering problems involving nonuniform triangulations
(IEEE, 2007)This paper shows the computational efficiency of the multilevel physical optics (MLPO) algorithm can be further increased by employing nonuniform triangulations of the target surface so that the triangle size is not nearly ... 
Numerical diffraction synthesis of 2D quasioptical power splitter
(IEEE, 200706)A new diffraction synthesis method is proposed for computing quasioptical 2D reflector beam splitters in the Epolarization case. It is a combination of a numerical gradient (NG) optimization and an efficient analysis ... 
On the errors arising in surface integral equations due to the discretization of the identity operator
(IEEE, 2009)Surface integral equations (SIEs) are commonly used to formulate scattering and radiation problems involving threedimensional metallic and homogeneous dielectric objects with arbitrary shapes. For numerical solutions, ... 
ParallelMLFMA solution of CFIE discretized with tens of millions of unknowns
(Institution of Engineering and Technology, 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
(IEEE, 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
(Institution of Engineering and Technology, 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 ... 
Preconditioned MLFMA solution of multiple dielectricmetallic composite objects with the electric and magnetic current combinedfield integral equation (JMCFIE)
(IEEE, 200906)We consider fast and accurate solutions of scattering problems involving multiple dielectric and composite dielectricmetallic structures with threedimensional arbitrary shapes. Problems are formulated rigorously with the ... 
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, 201006)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 ... 
Scalable parallelization of the sparseapproximateinverse (SAl) preconditioner for the solution of largescale integralequation problems
(IEEE, 200906)In this paper, we consider efficient parallelization of the sparse approximate inverse (SAI) preconditioner in the context of the multilevel fast multipole algorithm (MLFMA). Then, we report the use of SAI in the solution ... 
Scattering analysis of silver nanoparticles for solar cell applications using integral equations
(IEEE, 2018)Plasmonic nanoparticles (NPs) can be used to improve the efficiency of solar cells. Analysis of electromagnetic scattering from NPs is often carried out under the assumptions that they reside in air and have 'ideal' shapes ... 
Scattering and absorption performance of a microsize graphenebased parabolic reflector in the THz range illuminated by a complex line source
(IEEE, 2017)The scattering and absorption characteristics of a two dimensional (2D) parabolic reflector made of graphene and placed in the free space is simulated using the Method of Analytical Regularization (MAR) technique. Reflector ... 
Scattering from an impedance object at the edge of a perfectly conducting wedge
(Institute of Electrical and Electronics Engineers, 201402)In this study, scattering from impedance bodies positioned at the edge of a perfectly electrically conducting wedge is investigated. In the treatment of the problem, eigenfunction expansion in terms of spherical vector ... 
Scattering from impedance objects at the edge of a perfectly conducting wedge
(Bilkent University, 2012)In this study, scattering from impedance bodies positioned at the edge of a perfectly conducting (PEC) wedge is investigated. In the treatment of the problem, eigenfunction expansion in terms of spherical vector wave ... 
Signalprocessing techniques to reduce the sinusoidal steadystate error in the FDTD method
(IEEE, 200004)Techniques to improve the accuracy of the finitedifference timedomain (FDTD) solutions employing sinusoidal excitations are developed. The FDTD computational domain is considered as a sampled system and analyzed with ... 
Solution of extremely large integralequation problems
(IEEE, 2007)We report the solution of extremely large integralequation problems involving electromagnetic scattering from conducting bodies. By orchestrating diverse activities, such as the multilevel fast multipole algorithm, iterative ... 
The solution of large EFIE problems via preconditioned multilevel fast multipole algorithm
(Institution of Engineering and Technology, 2007)We propose an effective preconditioning scheme for the iterative solution of the systems formulated by the electric field integral equation (EFIE). EFIE is notorious for producing difficulttosolve systems. Especially, ... 
Solutions of electromagnetics problems involving hundreds of millions of unknowns with parallel multilevel fast multipole algorithmt
(IEEE, 200906)We present the solution of extremely large electromagnetics problems formulated with surface integral equations (SIEs) and discretized with hundreds of millions of unknowns. Scattering and radiation problems involving ...