Calculation Of Electric Field Intensity Research Articles

Применение сингулярных финитных функций для аппроксимации поверхностной плотности заряда в методе граничных интегральных уравнений

In this paper we consider application of singular functions for constructing finite element shapefunctions in problems of the electric field computation by the method of secondary sources. The main idea of this approach is based on the use of analytical solutions of the Laplace equation in the vicinity of special points of charged electrodes. Compared to traditional technologies of the charge density approximation on electrode surfaces, the considered approach allows to achieve high accuracy of calculation of electric field intensity in the vicinity of the charged object, including its angles and faces. The efficiency and high accuracy of the results obtained with such approximations is approved by comparison of the numerically derived field distributions with available analytical solutions.

PSO/GA Combined with Charge Simulation Method for the Electric Field Under Transmission Lines in 3D Calculation Model

The accurate calculation of electric field intensity under transmission lines is more and more important with the expansion of high voltage engineering, which largely determines the site selection and design of transmission projects. In order to get more accurate results, a methodology of a charge simulation method (CSM) combined with an intelligent optimization algorithm for a 3D calculation model is proposed in this paper. Three key points are emphasized for special mention in this optimized charge simulation method (OCSM). First, the number of sub-segments on the finite length conductor, the position and number of the simulating charge set on a sub-segment are taken as the optimization parameters for unified calculation. Secondly, the fitness function of optimization algorithm is constructed by two values, voltage relative error and electric field intensity relative error. Thirdly, a finite element method (FEM) was used to obtain the electric field intensities, which are compared with the results of the proposed algorithm. A simulation case is carried out on a 3D calculation model of 220 kV transmission lines, which verify the effectiveness of the optimization algorithm. The proposed OCSM solves the parameter optimization problem of CSM in the 3D computational model, which considers physical shape of wire span, and has the advantages of strong global search ability and higher calculation accuracy.

Design of Scalable Optical Decoder based on Hexagonal Plasmonic Modes induced on Topological Insulator Surface States

In the present work, optical decoder based on hexagonal plasmonic lens encrypted on topological insulator is designed. Using Finite Difference Time Domain (FDTD) simulation we have shown 2D optical lattice of scalar vortices in hexagonal plasmonic lens using surface states of topological insulator (Bi1.5Sb0.5Te1.8Se1.2). To ensure feasible and flexible physical dimensions, scaling of the optical device is proposed via increasing area density of vortices. This is numerically obtained by changing radius of hexagonal lens or decreasing incident wavelength. Using these scalable optical vortex lattices, a device scheme is proposed for storing or decoding information. Advantage of scaling in optical devices without any additional processing step shows the promise of this technology for future devices. Simulation results are further validated by detailed theoretical calculation of electric field intensity and phase distribution.

Accelerated floating random walk algorithm for the electrostatic computation with 3-D rectilinear-shaped conductors

With the advancement of fabrication technology, the electrostatic coupling has increasing impact on the performance of very large-scale integrated (VLSI) circuits and micro-electromechanical systems (MEMS). For the structures in VLSI circuits which are mostly rectilinear geometries, the floating random walk (FRW) method using cubic transition domains has been successfully applied to calculate the electric capacitances among interconnect wires. In this work, the techniques of importance sampling and stratified sampling are presented to accelerate the FRW algorithm by improving the convergence rate of the Monte Carlo procedure. An efficient approach is then presented to parallelize the FRW algorithm with the graphic processing units (GPUs). GPU-friendly algorithmic flow and data structure are designed to reduce the divergence among random walks and the time of accessing the device memory. The presented techniques are also applicable to the calculation of electric field intensity, which is also an important problem for nowadays nanometer-technology circuits. Numerical results are presented with several simple structures and larger ones from real VLSI circuits or MEMS. The results validate the accuracy of the presented techniques and demonstrate up to 100× speedup due to the variance reduction and GPU-based parallel computing.

Matrix formalism for calculation of electric field intensity of light in stratified multilayered films

A new algorithm has been proposed for the calculation of the electric field intensity in stratified multilayered films when light is incident on the system. The algorithm utilizes matrix formulas based on Abeles's formulas for the calculation of reflectance and transmittance. Equations for calculating patial absorptance due to a certain depth in the films are also derived. Some examples of the application of the electric field description are given for the analysis of three kinds of reflection spectroscopic methods which use metal surfaces: reflection-absorption, surface electromagnetic wave, and metal overlayer ATR methods. The algorithm given here offers a useful tool in understanding the mechanism of light absorption in various spectroscopic methods, and is convenient to use where intensity of the IR spectrum is of interest.

Theory of the Circular Diffraction Antenna

The object of this investigation is a study of the electromagnetic field produced by a diffraction antenna in the form of a circular gap made in a conducting plane. An e.m.f. is applied across the gap. The method of investigation is based on the classical diffraction theory by Fresnel and Kirchhoff. The expressions for E and H are obtained and applied to the calculation of electric field intensity at a great distance, and the directive patterns are plotted. The current distribution in the screen is then studied and the expression for the gap admittance is obtained. The surface current density appears as a sum of an infinite number of partials or wave modes. The radiation conductance rises step-wise with increasing radius like the radiation conductance of an oscillating sphere excited at the equator.