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Author: search.filters.author.Phaebua, K.Subject: search.filters.subject.Material-coated PEC cylinder

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    Item type:Publication,
    On an accuracy of the modified UTD solution for a convex impedance cylinder surface
    (2012-10-02)
    Phaebua, K.
    ;
    Phongcharoenpanich, C.
    ;
    Lertwiriyaprapa, T.
    This paper presents an accuracy of a modified UTD solution for a convex impedance cylinder based on the general 3D UTD solution for a smooth convex perfectly electric conductor (PEC) scattering problem. By employing the impedance boundary condition (IBC), the modified UTD solution for a convex impedance cylinder can be used for the material-coated PEC cylinder problem. Thus, the modified UTD solution for a convex impedance cylinder surface requires the surface impedance value (Z <inf>S</inf>). In this paper, the study of the limitation of approximated closed form of Z <inf>S</inf> is presented. The thickness of thin material-coated PEC cylinder will be investigated in terms of the ratio of material-coated thickness to radius of the cylinder. The mean squared error (MSE) between the modified UTD results and the reference results obtained from CST-Microwave Studio program is performed to investigate limitation of closed form of Z <inf>S</inf>. The relative permittivity ε <inf>r</inf> of a material-coated PEC cylinder in this paper is fixed to 4. The modified UTD solution result shows good agreement with the CST-Microwave Studio commercial software for the dielectric-coated thickness up to d/a ≤0.07 or d/0.14λ for a=2λ. © 2012 IEEE.