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<p>In this paper, a novel uneven absorption metasurface based on a hybrid mechanism is proposed for ultrawideband radar cross section (RCS) reduction. In the low band (3.03–17.1&#xa0;GHz), it primarily depends on the absorption of the double lossy layer, and in the high band (9.36–56.58&#xa0;GHz), it mainly relies on phase cancellation; in the intermediate band (9.36–17.1&#xa0;GHz), it mostly counts on the combined effects of absorption and phase cancellation from the height difference between lattices of the metasurface. The ratio of energy dissipation and the scattering patterns demonstrate this hybrid mechanism. The simulation results show that the proposed metasurface achieves 10&#xa0;dB monostatic RCS reduction in the band of 3.03–56.58&#xa0;GHz (179.67%) at <i>x</i>- and <i>y</i>-polarized normal incidence. It also achieves wide angular stability under oblique incidence and omnidirectional RCS reduction. Based on the proposed mechanism, a prototype of the metasurface is fabricated and measured. Due to the Limited experimental conditions, a 10&#xa0;dB monostatic RCS reduction is achieved over the measured band 2–40&#xa0;GHz (181%) at <i>x</i>- and <i>y</i>-polarized normal incidence. The simulation and measurement results are in good agreement.</p>

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A Novel Absorption Metasurface with Wide Angular Stability for Ultrawideband RCS Reduction

  • 期刊论文

  • 发表日期：

    2025年9月16日

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  • Huachen Zhao,
  • Zengrui Li,
  • Haonan Zhang,
  • Qingxin Guo,
  • Jinbo Liu,
  • Lamar Yaoqing Yang

摘要

In this paper, a novel uneven absorption metasurface based on a hybrid mechanism is proposed for ultrawideband radar cross section (RCS) reduction. In the low band (3.03–17.1 GHz), it primarily depends on the absorption of the double lossy layer, and in the high band (9.36–56.58 GHz), it mainly relies on phase cancellation; in the intermediate band (9.36–17.1 GHz), it mostly counts on the combined effects of absorption and phase cancellation from the height difference between lattices of the metasurface. The ratio of energy dissipation and the scattering patterns demonstrate this hybrid mechanism. The simulation results show that the proposed metasurface achieves 10 dB monostatic RCS reduction in the band of 3.03–56.58 GHz (179.67%) at x- and y-polarized normal incidence. It also achieves wide angular stability under oblique incidence and omnidirectional RCS reduction. Based on the proposed mechanism, a prototype of the metasurface is fabricated and measured. Due to the Limited experimental conditions, a 10 dB monostatic RCS reduction is achieved over the measured band 2–40 GHz (181%) at x- and y-polarized normal incidence. The simulation and measurement results are in good agreement.