The effect of rounding the corners of scattering structures: E-polarisation case

Paul D. Smith, Audrey J. Markowskei

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

    Abstract

    In studying electromagnetic wavabout:newtabe diffraction from scatterers with corners, a common approach is to first round the corners, thus producing a smooth surface, and eliminating the singularities introduced by the corners. Numerical methods based upon integral equation formulations can then be readily applied. In order to quantify the effect of such corner rounding we examine the two-dimensional case of diffraction from cylindrical scatterers which possess corners, that is, points at which the normal changes discontinuously. We employ a numerical method for the scattering of a E-polarised plane wave normally incident on a perfectly conducting cylindrical structures of constant cross-section and which may include corners. We assess the impact on near- and far-field scattering, as a function of the radius of curvature in the vicinity of the rounded corner point. We conclude by quantifying the rate of convergence of the maximum difference between the far-field solutions as that radius of curvature of the rounded scatterer approaches zero.

    Original languageEnglish
    Title of host publication2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS 2017)
    Subtitle of host publicationproceedings
    Place of PublicationPiscataway, NJ
    PublisherInstitute of Electrical and Electronics Engineers (IEEE)
    Pages1-4
    Number of pages4
    ISBN (Electronic)9789082598704, 9789082598711
    ISBN (Print)9781509044696
    DOIs
    Publication statusPublished - 2017
    Event32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada
    Duration: 19 Aug 201726 Aug 2017

    Conference

    Conference32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
    CountryCanada
    CityMontreal
    Period19/08/1726/08/17

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