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设计、仿真并实验验证了基于宽边耦合螺旋结构的低频小型化超材料吸波体.实验测试结果表明,该超材料吸波体在1.39GHz吸收率达到最大为98%,其单元尺寸和总厚度均为6.8mm,约为1/32工作波长,实现小型化窄带吸波.由于吸波体中螺旋结构是旋转对称排列的,因而其对垂直入射电磁波的极化方向是不敏感的.此外,该超材料吸波体对斜入射横电和横磁极化电磁波在60时,仍具有强吸收.
The low-frequency miniaturized metamaterial wave absorber based on the wide-bounded coupling helix structure is designed, simulated and experimentally.The experimental results show that the absorption rate of the metamaterial wave absorber reaches the maximum of 98% at 1.39GHz, and its unit size and total Thickness of 6.8mm, about 1/32 working wavelength, to achieve narrow-band narrowband absorbing .Because the helical structure of the absorber is rotationally symmetrical arrangement, and therefore, it is not sensitive to the direction of polarization of vertical incident electromagnetic waves. , The metamaterial wave absorbing body has strong absorption to diagonal incident transverse and transverse magnetic polarization electromagnetic waves at 60 o’clock.