Browsing by Keywords "Electromagnetic wave scattering"
Now showing items 120 of 45

Accurate planewave excitation in the FDTD method
(IEEE, Piscataway, NJ, United States, 1997)Different techniques are developed to implement planewave excitation on the finitedifference timedomain (FDTD) method, such as the initialcondition, the hardsource, and the connectingcondition techniques, for the ... 
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 circular reflectors by complex sourcedual series approach
(Institute of Electrical and Electronics Engineers, 1993)In the present paper, two dimensional circular reflector antennas are analyzed by a rigorous analyticalnumerical technique for both E and H polarization cases. The method is used in combination with the complex source ... 
Application of signalprocessing techniques to dipole excitations in the finitedifference timedomain method
(Taylor & Francis, 2002)The applications of discretetime signalprocessing techniques, such as windowing and filtering for the purpose of implementing accurate excitation schemes in the finitedifference timedomain (FDTD) method are demonstrated. ... 
Application of signalprocessing techniques to reduce the errors related to the FDTD excitations
(2001)A study on the reduction of the errors related to the finitedifference timedomain (FDTD) excitations was performed by employing signalprocessing techniques. Planewave scattering problems were simulated. The improvements ... 
Applications of hybrid discrete Fourier transform moment method to the fast analysis of large rectangular dipole arrays printed on a thin grounded dielectric substrate
(Wiley, 2002)Recently a discrete Fourier transformmethod of moments (DFTMoM) scheme was developed for fast analysis of electrically large rectangular planar dipole arrays, which has been shown to be very efficient in terms of number ... 
Comparison of surfacemodeling techniques
(IEEE, Piscataway, NJ, United States, 1997)Solution techniques based on surface integral equations are widely used in computational electromagnetics. The accurate surface models increase the accuracy solutions by using exact and flattriangulation models for a ... 
Comparisons of FMM implementations employing different formulations and iterative solvers
(2003)The implementation of multilevel fast multipole algorithm (MLFMA) requires the consideration of several parameters. The preferred combination of the parameters given is not trivially obvious and requires a careful ... 
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 ... 
Epolarized beam scattering by an open cylindrical PEC strip having an arbitrary "conicalsection" profile
(John Wiley & Sons, Inc., 2001)Twodimensional (2D) scattering of waves by a conducting strip with a canonical profile is simulated in the Epolarization case. This analysis is performed by reducing a singular integral equation (IE) to the dualseries ... 
Effective preconditioners for large integralequation problems
(2007)We consider effective preconditioning schemes for the iterative solution of integralequation methods. For parallel implementations, the sparse approximate inverse or the iterative solution of the nearfield system enables ... 
Efficient analysis of large phased arrays using iterative MoM with DFTbased acceleration algorithm
(John Wiley & Sons, Inc., 2003)A discrete Fourier transform (DFT)based iterative method of moments (IMoM) algorithm is developed to provide an O(Ntot) computational complexity and memory storages for the efficient analysis of electromagnetic ... 
Efficient parallelization of multilevel fast multipole algorithm
(2006)We report our efforts for the solution of large electromagnetics problems accurately and efficiently with the parallel multilevel fast multipole algorithm. We carefully investigate different stages of the parallelization ... 
Extension of forward backward method with DFT based acceleration algorithm for the efficient analysis of large periodic arrays with arbitrary boundaries
(Institute of Electrical and Electronics Engineers, 2003)An extension of ForwardBackward (FB) with Discrete Fourier Transform (DFT) based acceleration approach is presented. This is given to provide a relatively efficient analysis of EM radiation/scattering from an electrically ... 
Fast acceleration algorithm based on DFT expansion for the iterative MoM analysis of electromagnetic radiation/scattering from twodimensional large phased arrays
(IEEE, 200206)An acceleration algorithm based on Discrete Fourier Transform (DFT) is developed to reduce the computational complexity and memory storages of iterative methods of moment (IMoM) solution to O(Ntot), where Ntot is the total ... 
Fast algorithm for scattering from planar arrays of conducting patches
(Institute of Electrical and Electronics Engineers, 199804)A direct (noniterative) algorithm for the solution of the electromagnetic scattering from threedimensional planar arrays of conducting patches is developed. For an Nunknown problem, the computational complexity of this ... 
Fast and accurate solutions of scattering problems involving dielectric objects with moderate and low contrasts
(2007)We consider the solution of electromagnetic scattering problems involving relatively large dielectric objects with moderate and low contrasts. Threedimensional objects are discretized with RaoWiltonGlisson functions and ... 
Fast direct (noniterative) solvers for integralequation formulations of scattering problems
(IEEE, Piscataway, NJ, United States, 1998)A family of direct (noniterative) solvers with reduced computational complexity is proposed for solving problems involving resonant or nearresonant structures. Based on the recursive interaction matrix algorithm, the ... 
Fast direct solution algorithm for electromagnetic scattering from 3D planar and quasiplanar geometries
(IEEE, Piscataway, NJ, United States, 1997)A noniterative method and its application to planar geometries in homogeneous media is presented. The method is extendable to the cases of quasiplanar structures and/or layeredmedia problems. The fast direct algorithm ... 
Fast multipole method in layered media: 2D electromagnetic scattering problems
(IEEE (Institute of Electrical and Electronics Engineers), 1996)In this study, the Fast Multipole Method (FMM) is extended to layeredmedia problems. As an example, the solution of the scalar Helmholtz equation for the electromagnetic scattering from a twodimensional planar array of ...