Broadband metamaterial absorber based on magnetic substrate and resistance rings
Broadband metamaterial absorber based on magnetic substrate and resistance rings
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DOI：
10.1088/2053-1591/aaf988
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发表时间：
2019-04-01
影响因子：
2.3
通讯作者：
Suo Qingtao
中科院分区：
文献类型：
--
作者：
Gao Haitao;Wang Jianjiang;Suo Qingtao
设计了一种基于磁性衬底和电阻环的宽带超材料吸收体。该吸波器由电阻环、磁吸收层和金属平面三层耦合结构组成。基于时域有限差分（FDTD）方法进行了全波电磁仿真。超材料吸波器的优化厚度为2mm，实现了7.58 GHz和12.75 GHz的两个吸波拾取。该超材料在-10 dB以下的吸收范围为6.76 GHz ~ 15.97 GHz。电阻环结构激发出强烈的电磁共振，提高了低频吸收。MMA的吸收是由磁性衬底的磁损耗和介电损耗引起的。最后，制作了超材料吸收体样品并进行了测试，实验结果与模拟结果基本一致。所提出的超材料吸收体具有厚度薄、宽带宽、极化不敏感等优点。
A broadband metamaterial absorber was designed based on magnetic substrate and resistance rings. The absorber is composed of three layers coupling structures of resistance rings, magnetic absorbing layer and a metal plane. A full-wave electromagnetic simulation had been performed based on the finite-difference time-domain (FDTD) method. The optimized thickness of metamaterial absorber is 2 mm, two absorption picks at 7.58 GHz and 12.75 GHz are achieved. The absorption of this metamaterial absorber below -10 dB is from 6.76 GHz to 15.97 GHz. A strong electromagnetic resonance is excited by the resistance rings structure to improve the absorption in low-frequency. The absorption of MMA is originated from magnetic loss and dielectric loss in magnetic substrate. Finally, the sample of metamaterial absorber was fabricated and tested, the experimental results is basically consistent with the simulated results. The proposed metamaterial absorber has many advantages, such as thin thickness, broadband, and polarization insensitivity.