Browsing by Keywords "Integral equations"
Now showing items 120 of 110

Accurate simulation of reflector antennas by the complex sourcedual series approach
(Institute of Electrical and Electronics Engineers, 199508)The radiation from circular cylindrical reflector antennas is treated in an accurate manner for both polarizations. The problem is first formulated in terms of the dual series equations and then is regularized by the ... 
Algebraic acceleration and regularization of the source reconstruction method with the recompressed adaptive cross approximation
(IEEE, 2014)We present a compression algorithm to accelerate the solution of source reconstruction problems that are formulated with integral equations and defined on arbitrary threedimensional surfaces. This compression technique ... 
Analysis of a thin, penetrable, and nonuniformly loaded cylindrical reflector illuminated by a complex line source
(Institution of Engineering and Technology, 2017)A thin, penetrable, and cylindrical reflector is illuminated by the incident field of a complex source point. The scattered field inside the reflector is not considered and its effect is modelled through a thin layer ... 
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 circular reflectors by complex sourcedual series approach
(IEEE, 19930607)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 ... 
Analysis of cylindrically conformal antennas using closedform Green's function representations
(IEEE, 201504)Probefed microstrip patch antennas and slotted sectoral waveguide array antennas embedded in cylindrically stratified media are analyzed with a hybrid Method of Moments/Green's function technique, where closedform Green's ... 
Analysis of doublenegative materials with surface integral equations and the multilevel fast multipole algorithm
(IEEE, 2011)We present a fast and accurate analysis of doublenegative materials (DNMs) with surface integral equations and the multilevel fast multipole algorithm (MLFMA). DNMs are commonly used as simplified models of metamaterials ... 
Analysis of finite arrays of axially directed printed dipoles on electrically large circular cylinders
(IEEE, 2004)Various arrays consisting of finite number of printed dipoles on electrically large dielectric coated circular cylinders are investigated using a hybrid method of moments/Green's function technique in the spatial domain. ... 
Analysis of finite arrays of circumferentially oriented printed dipoles on electrically large cylinders
(Wiley, 2004)An efficient and accurate hybrid method of moments (MoM)/Green's function technique in the spatial domain is developed for the rigorous analysis of large, finite phased arrays of circumferentially oriented printed dipoles ... 
Analysis of Lossy Dielectric Objects with the Multilevel Fast Multipole Algorithm
(IEEE, 2011)Rigorous solutions of electromagnetics problems involving lossy dielectric objects are considered. Problems are formulated with two recently developed formulations, namely, the combinedtangential formulation (CTF) and the ... 
Anisotropy sensitivity of an acoustic lens with slit aperture
(IEEE, 1993)A conventional spherical acoustic lens is modified by restricting its aperture in the form of a slit to provide directional sensitivity. The spacing between the two parallel absorbing sheets forming the slit is adjustable ... 
Approaches for inequityaverse sorting
(Elsevier, 2016)In this paper we consider multicriteria sorting problems where the decision maker (DM) has equity concerns. In such problems each alternative represents an allocation of an outcome (e.g. income, service level, health ... 
Approximate MLFMA as an efficient preconditioner
(IEEE, 2007)In this work, we propose a preconditioner that approximates the dense system operator. For this purpose, we develop an approximate multilevel fast multipole algorithm (AMLFMA), which performs a much faster matrixvector ... 
Approximate Schur preconditioners for efficient solutions of dielectric problems formulated with surface integral equations
(IEEE, 200907)We propose direct and iterative versions of approximate Schur preconditioners to increase robustness and efficiency of iterative solutions of dielectric problems formulated with surface integral equations. The performance ... 
Closedform Green's functions for general sources and stratified media
(Institute of Electrical and Electronics Engineers, 199507)The closedform Green's functions of the vector and scalar potentials in the spatial domain are presented for the sources of horizontal electric, magnetic, and vertical electric, magnetic dipoles embedded in general, ... 
Combinedfield solution of composite geometries involving open and closed conducting surfaces
(IEEE, 200504)Combinedfield integral equation (CFIE) is modified and generalized to formulate the electromagnetic problems of composite geometries involving both open and closed conducting surfaces. These problems are customarily ... 
Compact optical temporal processors
(Optical Society of America, 1995)Optical signal processing can be done with timelens devices. A temporal processor based on chirpz transformers is suggested. This configuration is more compact than a conventional 4f temporal processor. On the basis of ... 
Comparison of surfacemodeling techniques
(IEEE, 199707)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
(IEEE, 200306)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
(IEEE, 200711)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 ...