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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
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Journal ArticleDOI
TL;DR: A new modal decomposition equivalent circuit method has been proposed for an analysis of multi-frequency and multi-layer frequency selective structure (FSS) and potentially allows the synthesis of FSS by the optimisation of circuit parameters.
Abstract: A new modal decomposition equivalent circuit method has been proposed for an analysis of multi-frequency and multi-layer frequency selective structure (FSS). The present paper is an extension of the previously published work where it has been shown that the method is valid for ‘thin’ and ‘thick’ FSS both for angles of incidence up to 60° and for any lattices and potentially allows the synthesis of FSS by the optimisation of circuit parameters. Further investigation has shown the methods validity for the analysis of complex FSS geometries. The method has been successfully applied for the analysis of double-ring slot FSS, ‘A-sandwich’ structures and so on. A very good agreement in comparison with the computational electromagnetic software and rigorous methods such as a periodic method of moments has been obtained.

37 citations

Journal ArticleDOI
TL;DR: In this article, a scale changing approach is proposed for the electromagnetic modeling of phase-shifter elements used in reconfigurable microelectromechanical system (MEMS)-controlled reflectarrays.
Abstract: A scale changing approach is proposed for the electromagnetic modeling of phase-shifter elements used in reconfigurable microelectromechanical system (MEMS)-controlled reflectarrays. Based on the partition of the discontinuity plane in planar sub-domains with various scale levels, this technique allows the computation of the phase shift from the simple cascade of networks, each network describing the electromagnetic coupling between two scale levels. The high flexibility of the approach associated with the advantages of the integral equations formulations renders this original approach powerful and rapid. The scale-changing technique allows quasi-instantaneous computing of the 1024 phase shifts achieved by ten RF-MEMS switches distributed on the phase-shifter surface. Moreover, the proposed approach is much better than the finite-element-method-based software in time costing. Experimental data are given for validation purposes

36 citations

Journal ArticleDOI
TL;DR: An analysis of electromagnetic scattering by an arbitrarily shaped anisotropic, but homogeneous material structure utilizing combined field surface integral equation formulation is presented in this article, where the appropriate electromagnetic potentials along with their appropriate gauges are used to represent the fields in the medium.
Abstract: An analysis of electromagnetic scattering by an arbitrarily shaped anisotropic, but homogeneous material structure utilizing combined field surface integral equation formulation is presented Derivation of the appropriate electromagnetic potentials for the time harmonic Maxwell's equations is also undertaken The medium in this study is characterized by its permittivity and permeability tensors, and the mathematical formulation is specialized to the two-dimensional anisotropic scatterer of arbitrary shape excited by a plane wave at normal incidence The derived potentials along with their appropriate gauges are used to represent the fields in the medium Subsequently, these field representations are utilized in the derivation of a set of coupled integral equations with the help of the equivalence principle Rigorous analysis approach is developed for the two-dimensional objects, both for the TM and the TE polarizations

36 citations

Journal ArticleDOI
TL;DR: A discontinuous Galerkin finite element method (DG-FEM) with a highly accurate time integration scheme for solving Maxwell equations is presented, but it uses coefficients that are obtained using a numerical scheme with fully controllable accuracy.
Abstract: A discontinuous Galerkin finite element method (DG-FEM) with a highly accurate time integration scheme for solving Maxwell equations is presented. The new time integration scheme is in the form of traditional predictor-corrector algorithms, PE(CE)m, but it uses coefficients that are obtained using a numerical scheme with fully controllable accuracy. Numerical results demonstrate that the proposed DG-FEM uses larger time steps than DG-FEM with classical PE(CE)m schemes when high accuracy, which could be obtained using high-order spatial discretization, is required.

36 citations

Journal ArticleDOI
TL;DR: Using the surface equivalence theorem, four coupled integral equations for electromagnetic scattering by a thin material plate were developed in this article, and these equations can be written as open surface integral equations.
Abstract: Using the surface equivalence theorem, four coupled integral equations are developed for electromagnetic scattering by a thin material plate. Using symmetry properties, it is shown that these equations can be written as open surface integral equations. Surface impedance relationships are obtained and used to eliminate two of the four integral equations. The remaining two equations are solved using the method of moments (MM). Numerical results for penetrable and impenetrable material plates are in reasonable agreement with measurements.

36 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202325
2022101
2021153
202091
2019109
2018107