ZHOU Qin,DU Guohong,SUN Xiaofeng,et al.Study of RCS Reduction of Multi-beam Metasurface based on Phase Gradient[J].Journal of Chengdu University of Information Technology,2020,35(04):419-423.[doi:10.16836/j.cnki.jcuit.2020.04.009]
基于相位梯度的多波束超表面的RCS缩减研究
- Title:
- Study of RCS Reduction of Multi-beam Metasurface based on Phase Gradient
- 文章编号:
- 2096-1618(2020)04-0419-05
- Keywords:
- phase gradient; multi-beam; RCS reduction; broadband
- 分类号:
- TN926+.21
- 文献标志码:
- A
- 摘要:
- 设计仿真了一款基于相位梯度的多波束超表面,在8～12 GHz频率范围内,超表面能有效地实现RCS缩减。超表面单元采用改进的风车形结构,具有极化不敏感性。当x极化波和y极化波沿-z轴入射时,均可实现585°的移相范围。将单元结构在x方向上按照相位梯度Δφx=60°排布,在y方向上按照相位梯度Δφx=120°排布,构成具有四波束的相位梯度超表面。仿真结果显示,在8～12 GHz频段,该超表面与同尺寸的金属面相比较,最大单站RCS缩减为25 dB,平均单站RCS缩减为15 dB。多波束相位梯度超表面具有波束数量、波束偏移方向的设计灵活性,对电磁波异常反射等特性,可有效缩减后向雷达散射能量,在隐身技术中具有重要的应用价值
- Abstract:
- A multi-beam metasurface based on phase gradient has been simulated and designed in this paper, which can effectively reduce RCS in the frequency range of 8-12 GHz.The metasurface element adopts an improved windmill structure, and it has polarization insensitivity. When x-polarized wave and y-polarized wave are incident along the-z axis, it can realize 585°phase shift. The element structures are arranged according to the phase gradient ofΔφx=60° in the x direction and the phase gradient ofΔφy=120° in the y direction to form a phase gradient metasurface with four beams. The simulation results show that the maximum monostatic RCS is reduced to 25 dB and the average monostatic RCS is reduced to 15 dB compared to the metal surface of the same size within 8-12 GHz.Multi-beam phase gradient metasurface has flexible designs in beam number and beam offset direction. Due to abnormal reflection phenomenon, it can effectively reduce backscattering energy of radar and has important application value in stealth technology
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备注/Memo
收稿日期:2020-01-08