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An Ultra-Thin Substrate-Based Conformal Meta-Absorber for EMI Shielding and RCS Minimization in C and X Band

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Abstract

This paper proposes an extremely thin, conformal ultra-wideband polarization-independent metasurface absorber. The proposed unit cell is backed with copper on an FR4 substrate. To increase the absorption bandwidth, four lumped resistors are linked to four identical circular metallic sectors in the structure’s uppermost layer, and an air spacer is used in between the substrate and ground layer. The near-unity absorption and greater than 20 dB RCS reduction, as well as more than 40 dB shielding effectiveness in the frequency range of 4.3 to 10.5 GHz, are unique features of this design. The simulation includes a surface current density analysis, normalized impedance, field distributions, conformality analysis, and a parametric examination. The numerical results are validated analytically using an equivalent circuit model. This structure is analyzed in depth for RCS reduction and EMI shielding applications. The fabricated model undergoes experimental characterization and validation, displaying remarkable alignment with the simulated outcomes.

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Availability of Data and Materials

The datasets generated and analyzed during the findings of the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology, Durgapur, West Bengal, India

    Niti Rani, Aashish Kumar Bohre & Aniruddha Bhattacharya

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  1. Niti Rani
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  2. Aashish Kumar Bohre
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  3. Aniruddha Bhattacharya
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Contributions

Niti Rani has performed the research work under the guidance of Aashish Kumar Bohre and Aniruddha Bhattacharya. The final version of the work has been reviewed and approved by all authors. All authors contributed significantly to the research and together assured its correctness and integrity.

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Correspondence to Niti Rani.

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Rani, N., Bohre, A.K. & Bhattacharya, A. An Ultra-Thin Substrate-Based Conformal Meta-Absorber for EMI Shielding and RCS Minimization in C and X Band. Plasmonics (2023). https://doi.org/10.1007/s11468-023-02159-3

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