Browsing Publications  Electrical & Computer Engineering by Issue Date
Now showing items 120 of 102

C++ a better language for engineering applications
(Institute of Electrical and Electronics Engineers, 200008) 
Two Dimensional Simulator for Propagation in Urban Environments
(Institute of Electrical and Electronics Engineers, 200107)A new twodimensional (2D) raytracing simulator for electromagnetic (EM) propagation prediction in an urban environment is described. The new features are that no practical restrictions are imposed on the profile of the ... 
Experimental Validation of SecondOrder Diffraction Coefficients for Computation of PathLoss Past Buildings
(Institute of Electrical and Electronics Engineers, 200202)Electromagnetic fields diffracted past buildings are not correctly predicted by raytracing methods using firstorder diffraction coefficients. Correct results are obtained by using secondorder diffraction coefficients ... 
Propagation Path Loss—A Comparison Between RayTracing Approach and Empirical Models
(Institute of Electrical and Electronics Engineers, 200205)The results obtained with a twodimensional (2–D) propagation model for wireless communications in an urban environment are compared against the results of other propagation models, such as COST231 WalfischIkegami, ... 
TimeDomain Analysis of Measurements on Scaled Urban Models With Comparisons to RayTracing Propagation Simulation
(Institute of Electrical and Electronics Engineers, 200205)This work deals with propagation prediction for wireless communications in urban environments. Its purpose is to clearly distinguish the different field contributions collected by the receiving antenna through a series of ... 
Measurements on scaled models of urban environments and comparisons with raytracing propagation simulation
(Institute of Electrical and Electronics Engineers, 200205)Scaled models of simple twodimensional (2D) urban environments are considered in order to investigate propagation along a vertical plane. Specifically, path loss measurements are taken for different positions of the ... 
Magnetization Reversal and Configurational Anisotropy of Dense Permalloy Dot Arrays
(American Institute of Physics, 20020624)Electron beam patterned permalloy circular dots of 700 nm diameter with small separations were studied by magnetic force microscopy (MFM) in the presence of an in situ magnetic field. Images in the demagnetized state show ... 
Acceleration of the Convergence of Series Containing Mathieu Functions Using Shanks Transformation
(Institute of Electrical and Electronics Engineers, 200304)A modification of the standard application of Shanks transformation is shown to improve the convergence rate in certain cases where the straightforward application of Shanks transformation fails. Here, the straightforward ... 
Exact Radiation and Scattering for an Elliptic Metal Cylinder at the Interface Between Isorefractive HalfSpaces
(Institute of Electrical and Electronics Engineers, 200409)An elliptic metal cylinder located at the interface between two isorefractive halfspaces, with its crosssectional major axis either parallel or perpendicular to the interface is considered. The problems of scattering ... 
Exact Dipole Radiation for an Oblate Spheroidal Cavity Filled With Isorefractive Material and ApertureCoupled to a Half Space
(Institute of Electrical and Electronics Engineers, 200409)An oblate semispheroidal cavity flushmounted under a metal plane and coupled to the halfspace above it via its circular interfocal aperture is considered. The cavity is filled with a material isorefractive to the medium ... 
Numerical analysis of penetration, radiation, and scattering for a 2D slotted semielliptical channel filled with isorefractive material
(Progress in Electromagnetic Research, 2005)Electromagnetic penetration through an aperture into a cavity is considered. The structure of interest comprises a slotted infinite conducting plane backed by a semielliptical channel. Three independent integral equations ... 
Currents on Conducting Surfaces of a SemiellipticalChannelBacked Slotted Screen in an Isorefractive Environment
(Institute of Electrical and Electronics Engineers, 200507)Electromagnetic penetration through an aperture into a cavity is considered. The structure of interest is a semielliptical channel flush mounted under a metal plane and slotted along the interfocal distance of its ... 
Penetration, Radiation, and Scattering for a CavityBacked Gap in a Corner
(Institute of Electrical and Electronics Engineers, 200508)A partially covered cavity, or trench, located along the edge of two intersecting metallic walls perpendicular to each other is considered. The crosssection of the cavity is a quarter ellipse and is slotted along the ... 
Fresnel–Kirchhoff Integral for 2D and 3D Path Loss in Outdoor Urban Environments
(Institute of Electrical and Electronics Engineers, 200511)A deterministic model for propagation in outdoor urban environments based on the Fresnel–Kirchhoff integral is presented. Both twodimensional (2D) and threedimensional (3D) formulations considering reflection and ... 
Exact Radiation for Dipoles on Metallic Spheroids at the Interface Between Isorefractive HalfSpaces
(Institute of Electrical and Electronics Engineers, 200512)Oblate and prolate metallic spheroids located at the interface between isorefractive halfspaces are considered. The electromagnetic fields produced by electric and magnetic dipoles located on the symmetry axis of the ... 
Scattering by a blade on a metallic plane
(Taylor & Francis, 200601)The scattering from a metal plane with a ridge is considered for the cases of plane wave and line source illumination and both polarizations. Exact analytical results are expressed using series that contain products of ... 
Algorithm 861: Fortran 90 Subroutines for Computing the Expansion Coefficients of Mathieu Functions Using Blanch’s Algorithm
(ACM, 200612)A translation to Fortran 90 of Gertrude Blanch’s algorithm for computing the expansion coefficients of the series that represent Mathieu functions is presented. Its advantages are portability, higher precision, practicality ... 
Exact radiation of a dipole in the presence of a circular aperture in a ground plane backed by a spheroidal cavity and covered with an isorefractive diaphragm
(American Geophysical Union, 200710)An oblate semispheroidal cavity with metallic walls flushmounted under a metallic ground plane is coupled to the halfspace above the ground plane through an aperture that corresponds to the interfocal disk of the ... 
Exact 2D scattering from a slot in a ground plane backed by a semielliptical cavity and covered with an isorefractive diaphragm
(American Geophysical Union, 200711)A semielliptical channel flushmounted under a metal plane and slotted along the interfocal distance of its crosssection is separated from the half space above by a diaphragm. The cavity, the diaphragm, and the half ... 
Enhanced pinning of superconducting vortices by magnetic vortices
(American Physical Society, 200802)Periodic arrays of magnetic structures are well known to give rise to commensurate pinning of superconducting vortices in adjacent superconducting films. In this work we compare the pinning effects due to magnetic dots ...