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IEE Proceedings A - Physical Science, Measurement and Instrumentation, Management and Education - Reviews

Issue 8 • Date September 1987

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Displaying Results 1 - 10 of 10
  • Electromagnetism: computational methods and applications. Part I

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (168 KB)
    Freely Available from IEEE
  • Self-adaptive mesh generation technique for the finite-element method

    Publication Year: 1987, Page(s):634 - 650
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1997 KB)

    A self-adaptive finite-element mesh generation scheme is presented which allows the computer user to specify a minimal mesh structure and still generate a mesh structure that is optimal. The technique is based on complementary finite-element principles that also guarantee global error bounds. Practical results are presented, using a computer package incorporating these features, that illustrate th... View full abstract»

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  • Biographies of the guest editors

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (153 KB)
    Freely Available from IEEE
  • Finite-element analysis of three-dimensional eddy currents in attractive electromagnetic levitation

    Publication Year: 1987, Page(s):651 - 662
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1139 KB)

    In the design of an attractive electromagnetic levitation system, it is necessary to predict the force on the system. The finite element method is used in the paper to solve the associated electromagnetic field problem involving eddy currents. Two formulations, which are economical when used with this numerical method of solution, are compared, and the peculiarities of the 3-dimensional eddy curre... View full abstract»

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  • Calculation of three-dimensional electromagnetic fields involving laminar eddy currents

    Publication Year: 1987, Page(s):663 - 671
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1101 KB)

    The formulation of a method to solve steady-state electromagnetic field problems involving laminar eddy currents is described. Iron nonlinearity is included. The formulation is implemented using finite elements and the problems associated with the solution of the resulting nonlinear equations discussed. Experiments with a Newton-Raphson iteration and modifications to it are described and a best al... View full abstract»

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  • Surface impedance of saturating iron in nonuniform pulsating fields

    Publication Year: 1987, Page(s):672 - 678
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (752 KB)

    The use of well known one-dimensional surface impedance expressions in two- and three- dimensional field computation is inadequate where field strengths are varying rapidly, and near corners. The paper uses the wavefront method to derive expressions for the surface impedance of saturating iron when there are first- and second- order spatial variations of field at the surface. The results show that... View full abstract»

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  • Coupling between electromagnetic fields and wires using transmission-line modelling

    Publication Year: 1987, Page(s):679 - 686
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (797 KB)

    The paper is concerned with the interference caused by the incidence of electromagnetic waves on interconnecting wires or cable harnesses in a shielded enclosure. In particular it describes three ways of using transmission-line modelling (TLM) for calculating the coupling of electromagnetic fields with wires. It also shows how TLM can be used to solve the propagation of energy along the wires to o... View full abstract»

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  • Self-consistent modal field analysis of injection-laser devices

    Publication Year: 1987, Page(s):687 - 693
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (715 KB)

    The paper reports a new method of modal field analysis specifically designed to allow simulation of certain types of multiple coupled waveguides. The analysis, based on a transverse resonance method, allows direct determination of a required optical mode (or supermode) in waveguides of arbitrary complex permittivity profiles. The method solves Maxwell's equations and includes a stability analysis ... View full abstract»

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  • Field singularities near aperture corners

    Publication Year: 1987, Page(s):694 - 698
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (682 KB)

    The fields near the tip of a flat metallic sector may become infinite according to a law (1/Rm), where R is the distance to the tip. Data are given on the value of exponent m as a function of the opening angle of the sector. The nature of the singularity is investigated for both the electric and the magnetic fields, and for sharp and re-entrant corners. Data are also given on the component of the ... View full abstract»

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  • Theory for calculating approximate values for the propagation constants of an optical rib waveguide by weighting the refractive indices

    Publication Year: 1987, Page(s):699 - 702
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (431 KB)

    The effective-index method is an approximate way of calculating the propagation constants of a rib waveguide. It is shown that the range of application and the uniformity of approximation can be enhanced by weighting the indices appropriately. The theory is presented and the results compared with accurately known values. View full abstract»

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