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.
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TL;DR: In this paper, the authors introduced the application of wavelet in Electromagnetic Scattering and made improvement in the moment method development by using wavelet expansion, wavelets as basis and testing functions, a sparse matrix is generated from the previous moment method dense matrix, which may save computational cost.
Abstract: —The aim of this work is to introduce the application of wavelet in Electromagnetic Scattering and making improvement in the moment method development. The conventional moment method basis and testing functions are used to digitalize the integral equations of the electric or magnetic field, resulting in dense matrix impedance. By using the wavelet expansion, wavelets as basis and testing functions, a sparse matrix is generated from the previous moment method dense matrix, which may save computational cost. Here application has been made upon two types of two dimensional antennas, which are circular cylindrical antennas and parabolic reflector antennas. Results are compared to the previous work done and published, excellent results are obtained.
22 citations
TL;DR: In this paper, a fast 1D electromagnetic modeling method has been developed and tested, which allows simulating triaxial responses of induction and propagation resistivity logging tools for both logging-while-drilling and wireline applications.
Abstract: A fast 1D electromagnetic modeling method has been developed and tested. It allows simulating triaxial responses of induction and propagation resistivity logging tools for both logging-while-drilling and wireline applications. An important new feature of the method is its ability to model resistivity tool responses in 1D biaxial anisotropic medium, whose anisotropy tensor has up to three different principal values. This feature is particularly useful to evaluate fractured formations. A few possible implementations of the method have been suggested. The modeling code has been extensively tested versus three other independent modeling methods. The new method demonstrates a high sensitivity of transverse and cross couplings of triaxial tensor measurement to all three principal values of the conductivity tensor.
22 citations
TL;DR: In this article, the scale-transformation invariants for electromagnetic field are derived and their physical meaning is also presented and it is indicated by simulation that the electromagnetic waves located in medium can be considered to be isotropic due to the fact that the size of propagating vector affected by the scale factors and observing azimuth is on a size of 10−9.
Abstract: The scale-transformation of electromagnetic theory is investigated in detail based on the form of Maxwell equations in scale-transformation being unchanged in different coordinate systems. The relations of electromagnetic parameters in a rectangular coordinate system and in a spherical coordinate system are presented respectively. The scale-transformation invariants for electromagnetic field are derived and their physical meaning is also presented. It is indicated by simulation that the electromagnetic waves located in medium can be considered to be isotropic due to the fact that the size of propagating vector affected by the scale factors and observing azimuth is on a size of 10−9, which provides a new approach for investigating the electromagnetic characteristics of ellipsoidal targets.
22 citations
TL;DR: In this article, the authors presented a full-wave analysis of anisotropic waveguides which are characterized simultaneously by both off-diagonal second rank symmetric [/spl epsiv/] and [/spl mu/] tensors.
Abstract: For the purpose of modeling anisotropic optical fibers, accurate and efficient description of how electromagnetic waves propagate in these structures of arbitrary geometry is required. This paper presents a full-wave analysis of anisotropic waveguides which are characterized simultaneously by both off-diagonal second rank symmetric [/spl epsiv/] and [/spl mu/] tensors. By using the H/sub 1/(curl) tangential vector finite element method, electromagnetic characteristics of propagating modes in the fibers are obtained without the occurrence of spurious modes. In this procedure, a formulation in terms of vector and scalar potentials is adopted and the eigenvalue of the final matrix equation corresponds to the propagation constant itself. Furthermore, the direct matrix solution technique with minimum degree of reordering has been combined with the modified Lanczos algorithm to solve for the resultant sparse generalized eigenmatrix equation efficiently. To demonstrate the strength of the present method, numerical results are verified and agreements with other published results are achieved.
22 citations
10 Apr 2016
TL;DR: In this paper, the authors describe a new platform-independent and computationally efficient full-body electromagnetic model, the Visible Human Project® (VHP)-Female v.3.0 and outline its distinct features.
Abstract: Simulation of the electromagnetic response of the human body relies upon efficient computational models. The objective of this paper is to describe a new platform-independent and computationally-efficient full-body electromagnetic model, the Visible Human Project® (VHP)-Female v.3.0 and to outline its distinct features. We also report model performance results using two leading commercial electromagnetic antenna simulation packages: ANSYS HFSS and CST MICROWAVE STUDIO®.
22 citations