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

FDTD simulations of multiple GPR systems
(IEEE, 200306)A multipleGPR detection system was simulated. The main advantage of such a system was that it saves time by detecting both the transverse and the longitudinal positions of the target by a Bscan measurement, whereas the ... 
Hierarchical parallelization of the multilevel fast multipole algorithm for the efficient solution of largescale scattering problems
(IEEE, 200807)We present the details of a hierarchical parallelization strategy, which provides higher efficiency than the previous parallelization approaches for MLFMA. We demonstrate the effectiveness of our algorithm on sphere problems ... 
A highfrequency based asymptotic solution for surface fields on a sourceexcited sphere with an impedance boundary condition
(WileyBlackwell Publishing, 20101005)A highfrequency asymptotic solution based on the Uniform Geometrical Theory of Diffraction (UTD) is proposed for the surface fields excited by a magnetic source located on the surface of a sphere with an impedance boundary ... 
Hybrid CFIEEFIE solution of composite geometries with coexisting open and closed surfaces
(IEEE, 2005)The combinedfield integral equation (CFIE) is employed to formulate the electromagnetic scattering and radiation problems of composite geometries with coexisting open and closed conducting surfaces. Conventional formulations ... 
Hybridizing physical optics with MLFMA for efficient scattering computations of threedimensional complex targets
(IEEE, 200907)The multilevel fast multipole algorithm (MLFMA) provides accurate and efficient solutions of electromagnetic scattering problems involving large and complicated structures. On the other hand, whenever applicable, accelerations ... 
Improving the accuracy of the MFIE with the choice of basis functions
(IEEE, 200406)The accuracy of the magneticfield integral equation (MFIE) for the Method of Moments (MOM) and fastmultiplemethod (FMM) solutions of the electromagnetic scattering problems modeled by abitrary planar triangulations is ... 
Investigation of the inaccuracy of the MFIE discretized with the RWG basis functions
(IEEE, 200406)The inaccuracy of the magneticfield integral equation (MFIE) discretized with the RaoWiltonGlisson (RWG) basis functions is discussed. The electricfield integral equation (EFIE) gives accurate results with the usage ... 
Metamaterial based cloaking with sparse distribution of spiral resonators
(SPIE, 2010)We investigate the application of a metamaterial that is formed by the sparse distribution of spiral resonators as an optical transformation medium is in order to achieve electromagnetic cloaking. The wellknown ClausiusMossotti ... 
The method of analytical regularization in the electromagnetic wave scattering by thin disks
(Institution of Engineering and Technology, 2007)We consider the problem of diffraction of an arbitrary electromagnetic wave by a thin disk made from different materials and located in free space. Here we imply a zero thickness perfectly electrically conducting (PEC) ... 
MLFMA memory reduction techniques for solving largescale problems
(IEEE, 2014)We present two memory reduction methods for the parallel multilevel fast multipole algorithm. One of these methods uses data structures out of core, and the other parallelizes the data structures related to input geometry. ... 
On the accuracy of MFIE and CFIE in the solution of large electromagnetic scattering problems
(ESA Publications, 2006)We present the linearlinear (LL) basis functions to improve the accuracy of the magneticfield integral equation (MFIE) and the combinedfield integral equation (CFIE) for threedimensional electromagnetic scattering ... 
On the frequencyband selection for groundpenetrating radars operating over lossy and heterogeneous grounds
(IEEE, 200107)The frequencyband selection for ground penetrating radars operating over lossy and heterogenous grounds was discussed. The simulations were carried out using perfectly matched layer (PML) absorbing boundary conditions ... 
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 ... 
Radar crosssection study of cylindrical cavitybacked apertures with outer or inner material coating: the case of Epolarization
(IEEE, 1993)A dualseriesbased solution is obtained for the scattering of an Epolarized plane wave from a cavitybacked aperture which is formed by a slitted infinite circular cylinder coated with absorbing material. The material ... 
RCS study of cylindrical cavitybacked apertures with outer or inner material coating: the case of epolarization
(IEEE, 1993)Cavitybacked apertures (CBA) are encountered as parts of any airborne or spaceborne radar targets. Most familiar of them are, probably, air inlets and engine tubes, known to contribute a great deal to radar cross section ... 
Simulation of TRTconfigured groundpenetrating radars over heterogeneous grounds
(IEEE, 2001)The simulation of transmitterrecievertransmitter (TRT) configured groundpenetrating radars over heterogeneous grounds was discussed. The finitedifference timedomain (FDTD) methods along with the perfectlymatched layer ... 
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 large integralequation problems with preconditioned MLFMA
(IEEE, 2007)We report the solution of the largest integralequation problems in computational electromagnetics. We consider matrix equations obtained from the discretization of the integralequation formulations that are solved ... 
Subsurfacescattering calculations via the 3D FDTD method employing PML ABC for layered media
(IEEE, 1997)A threedimensional finitedifference timedomain method that employs pure scatteredfield formulation and perfectly matched layers (PML) as the absorbing boundary condition is developed for solving subsurfacescattering. ...