volume | PIER Journals

Abstract

Recently, the introduction of surface phase in Snell's law and Huygens' phenomena leads to ultrathin phased surfaces which can tailor the transmission and scattering of the incident wavefront in many ways. In this article, a remodeled Jerusalem cross used as the meta-element whose geometrical parameters are varied to obtain 360° phase variation, and a 3-bit quantization is presented to design phase coded surfaces to manipulate (focusing and splitting) normally incident beam. Further, two 3-bit phase quantized supercells of approximately 2λ length and width are proposed and simulated (3x3 matrix arrangement) to test and compare the scattering properties with traditional chessboard type supercell. Obtained simulated results show diffused reflections for both the models and reduced intensity of four corner lobes in comparison to chessboard supercells (at θ=30˚ and ϕ=45˚). Experimentally recorded monostatic RCS of model-2 prototype has a close agreement with the simulated results and more than 10 dBsm RCS reduction observed from 9 GHz-11 GHz.

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Dr. Rajanikanta Swain

Prof. Rabindra Kishore Mishra