Topic
Computational electromagnetics
About: Computational electromagnetics is a research topic. Over the lifetime, 6412 publications have been published within this topic receiving 113727 citations. The topic is also known as: Electromagnetic field analysis.
Papers published on a yearly basis
Papers
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12 Apr 2010TL;DR: In this paper, a method for modeling electromagnetic emissions from printed circuits with equivalent dipole sources is presented, and an optimization procedure based on the genetic algorithm is used to determine the number of equivalent dipoles and their parameters by fitting to the measured near fields.
Abstract: A method for modeling electromagnetic emissions from printed circuits with equivalent dipole sources is presented. An optimization procedure based on the genetic algorithm is used to determine the number of equivalent dipoles and their parameters by fitting to the measured near fields. Prediction of emissions from the PCB can then be obtained by computing from the equivalent model without reference to the details of the PCB.
23 citations
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TL;DR: This paper outlines an electromagnetic optimization technique dedicated to the design of microwave bandpass filters that combines an electromagnetic analysis and a parameter extraction to determine the optimal dimensions of the electromagnetic model.
Abstract: This paper outlines an electromagnetic optimization technique dedicated to the design of microwave bandpass filters. The purpose is to determine the optimal dimensions of the electromagnetic model. Applying this technique, the geometrical dimensions of the distributed structure are accurately determined, and no experimental readjustment is necessary. The optimization procedure combines an electromagnetic analysis and a parameter extraction. The analysis method is a finite-element modeling coupled with a frequency parameterization technique for improving the computation time. The parameter extraction method is based on the approximation of the simulated scattering matrix and on the synthesis of the equivalent electrical network. The comparison between extracted and ideal networks enables to converge the optimal dimensions. The procedure is applied to design a dual-mode waveguide filter. In this case, within the electromagnetic model, the screws are taken into account using lumped elements which may be adjusted independently.
23 citations
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TL;DR: An overview of the applications of multiple-precision arithmetic in CEM was presented and some open problems in electromagnetics were pointed out for further investigations.
Abstract: An overview of the applications of multiple-precision arithmetic in CEM was presented in this paper for the first time. Although double-precision floating-point arithmetic is sufficient for most scientific computations, there is an expanding body of electromagnetic problems requiring multiple-precision arithmetic. Software libraries facilitating these computations were described, and investigations requiring multiple-precision arithmetic were presented. In particular, numerical-precision issues were demonstrated based on the example of the discrete Green's function. Finally, some open problems in electromagnetics were pointed out for further investigations.
23 citations
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TL;DR: In this paper, a semi-analytic approach is described which combines closed form solution for the exterior region with a finite element T-Omega discretization of the interior region for axisymmetric geometries.
Abstract: Field computation of electromagnetic devices involves the modeling of the exterior open boundary region. Discretization of the exterior region by finite differences or finite elements is cumbersome, uneconomical and computationally inefficient. A semi-analytic approach is described in this paper which combines closed form solution for the exterior region with a finite element T-Omega discretization of the interior region for axisymmetric geometries.
23 citations
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TL;DR: In this paper, an entire-domain Galerkin expansion along one dimension of the body and a piecewise continuous one along the other are used to represent the unknown current variations.
Abstract: Electromagnetic scattering from finite, conducting bodies of translation (BOT) is examined using a formulation based on the electric field integral equation (EFIE) and solved by the method of moments (MM). The present approach provides a systematic, unified treatment for a wide class of finite, thin scatterers at all angles of illumination and polarization. Both concave and convex surfaces are considered. An entire-domain Galerkin expansion along one dimension of the body and a piecewise continuous one along the other are used to represent the unknown current variations. The scattering cross sections, obtained with this formulation, are compared with published results using more specialized methods and further confirmed by experimental measurements.
22 citations