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<p>This work presents the design, development, and simulation of a lead-free metamaterial microwave absorber based on Mg-doped (1–<i>y</i>)[(0.94)BaTiO<sub>3</sub>–0.06BaZrO<sub>3</sub>]–yMgO ceramics, synthesized via high-energy planetary ball milling. Structural, and morphological analyses were performed using XRD, and FESEM, confirming the formation of a pure rhombohedral perovskite phase. Dielectric and magnetic properties were evaluated in the Ku-band (12.4–18&#xa0;GHz) using a Vector Network Analyzer. The composition with <i>y</i> = 0.02 exhibited optimal performance, indicating excellent impedance matching with a total shielding effectiveness (SE<sub>T</sub>) of 55.9&#xa0;dB, dominated by absorption. A metamaterial absorber using this ceramic as a substrate was modelled and simulated in CST Studio, achieving an absorptivity of 98.79% at 13.87&#xa0;GHz. These results demonstrate the strong correlation between microstructural tuning and electromagnetic response, establishing Mg-doped BaTiO<sub>3</sub>–BaZrO<sub>3</sub> ceramics as promising eco-friendly candidates for EMI shielding, stealth, IoT, and 5G communication applications.</p>

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Simulation and characterization of Mg-doped (BaTiO3–BaZrO3) ceramic metamaterial absorber for EMI shielding in Ku-band

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Prafulla K. Dash,
  • Dibyaranjan Das,
  • S. K. S. Parashar

摘要

This work presents the design, development, and simulation of a lead-free metamaterial microwave absorber based on Mg-doped (1–y)[(0.94)BaTiO3–0.06BaZrO3]–yMgO ceramics, synthesized via high-energy planetary ball milling. Structural, and morphological analyses were performed using XRD, and FESEM, confirming the formation of a pure rhombohedral perovskite phase. Dielectric and magnetic properties were evaluated in the Ku-band (12.4–18 GHz) using a Vector Network Analyzer. The composition with y = 0.02 exhibited optimal performance, indicating excellent impedance matching with a total shielding effectiveness (SET) of 55.9 dB, dominated by absorption. A metamaterial absorber using this ceramic as a substrate was modelled and simulated in CST Studio, achieving an absorptivity of 98.79% at 13.87 GHz. These results demonstrate the strong correlation between microstructural tuning and electromagnetic response, establishing Mg-doped BaTiO3–BaZrO3 ceramics as promising eco-friendly candidates for EMI shielding, stealth, IoT, and 5G communication applications.