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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2011-09-14
A New Accurate Model of High-Impedance Surfaces Consisting of Circular Patches
By
Davide Ramaccia,

    Dr. Davide Ramaccia

    Department of Applied Electronics

    University of Rome RomaTre

    Italy

    Homepage

Alessandro Toscano,

    Professor Alessandro Toscano

    Department of Applied Electronics

    University of

    Italy

    Homepage

Filiberto Bilotti

    Dr. Filiberto Bilotti

    Department of Applied Electronics

    University of Roma Tre

    Italy

    Homepage

Progress In Electromagnetics Research M, Vol. 21, 1-17, 2011
doi:10.2528/PIERM11050909 | Google Scholar

Abstract
In this paper, we consider a dense array of metallic circular patches printed on a electrically thin metal-backed dielectric substrate. Since the sub-wavelength dimensions, the array and the metal-backed substrate can be described in terms of a lumped capacitance and a lumped inductance, respectively. Around the resonant frequency, the structure, known as high-impedance surface, reflects totally an incident electromagnetic wave with zero shift in phase. Due to this property, it is widely employed in antenna systems as compact back reflector with improved performances with respect to typical metal reflector. Starting from the concept of the grid capacitive reactance of a planar array of squared patches and its related formulas, we investigate on the field distribution on the array plane and properly modify the formulas for the case of the circular patches. We present two new analytical formulas which can be effectively used for the fast design of 2D-isotropic circular HISs. In order to validate the models, we compare the resonant frequency of the array obtained through our approaches to the one resulting from full-wave numerical simulations and from other analytical methods available in the open technical literature.
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Citation
Davide Ramaccia, Alessandro Toscano, and Filiberto Bilotti, "A New Accurate Model of High-Impedance Surfaces Consisting of Circular Patches," Progress In Electromagnetics Research M, Vol. 21, 1-17, 2011.
doi:10.2528/PIERM11050909
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