A five-band metamaterial absorber (MMA) is presented. The proposed absorber consists of a three-layer structure of the top metal resonator, intermediate dielectric layer, and bottom metal plane. The top structure takes the centroid as the center and spreads out in a three-pronged shape with an average of 360°, and the ends bifurcate again. The calculation was carried out by the professional software to iteratively optimize the absorption effect of MMA in the microwave range. The results show that the MA has five peaks at resonant frequencies of 5.984 GHz, 12.232 GHz, 18.128 GHz, 18.414 GHz, and 20.592 GHz, with peaks of 0.9925, 0.9968, 0.9783, 0.9754, and 0.9975. By analyzing the electromagnetic field and surface current distribution of the absorber, the absorption mechanism is further verified, and the corresponding influence on the absorption spectrum is studied according to different polarization angles and incident angles. The effects of different resonator structure size and dielectric layer thickness on absorption rate were also discussed, and the distribution of electromagnetic fields is analyzed to reveal the existence of electric dipole resonance and magnetic resonance. Through comparing experiments and simulations, it is found that the peaks of the 1st, 2nd, and 5th have smaller absorption errors and frequency deviation, while the peaks of the 3rd and 4th have large ones. The five-band absorber has potential application in multiband electromagnetic stealth, bionic sensor, thermal radiation measuring instrument, and so on.

中文翻译：

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五波段极化不敏感超材料吸收体的设计与分析

提出了一种五波段超材料吸收器（MMA）。提出的吸收器由顶部金属谐振器，中间介电层和底部金属平面的三层结构组成。顶部结构以质心为中心，以三叉形展开，平均360度，两端再次分叉。通过专业软件进行计算，以迭代地优化MMA在微波范围内的吸收效果。结果表明，MA在5.984 GHz，12.232 GHz，18.128 GHz，18.414 GHz和20.592 GHz的谐振频率上有五个峰，分别为0.9925、0.9968、0.9783、0.9754和0.9975。通过分析吸收体的电磁场和表面电流分布，进一步验证了吸收机理，根据不同的偏振角和入射角，研究了其对吸收光谱的影响。还讨论了不同谐振器结构尺寸和介电层厚度对吸收率的影响，并分析了电磁场的分布以揭示电偶极子谐振和磁共振的存在。通过比较实验和模拟，发现第一，第二和第五峰值具有较小的吸收误差和频率偏差，而第三和第四峰值具有较大的吸收误差和频率偏差。五频带吸收器在多频带电磁隐身，仿生传感器，热辐射测量仪器等方面具有潜在的应用。还讨论了不同谐振器结构尺寸和介电层厚度对吸收率的影响，并分析了电磁场的分布以揭示电偶极子谐振和磁共振的存在。通过比较实验和模拟，发现第一，第二和第五峰值具有较小的吸收误差和频率偏差，而第三和第四峰值具有较大的吸收误差和频率偏差。五频带吸收器在多频带电磁隐身，仿生传感器，热辐射测量仪器等方面具有潜在的应用。还讨论了不同谐振器结构尺寸和介电层厚度对吸收率的影响，并分析了电磁场的分布以揭示电偶极子谐振和磁共振的存在。通过比较实验和模拟，发现第一，第二和第五峰值具有较小的吸收误差和频率偏差，而第三和第四峰值具有较大的吸收误差和频率偏差。五频带吸收器在多频带电磁隐身，仿生传感器，热辐射测量仪等方面具有潜在的应用。通过比较实验和模拟，发现第一，第二和第五峰值具有较小的吸收误差和频率偏差，而第三和第四峰值具有较大的吸收误差和频率偏差。五频带吸收器在多频带电磁隐身，仿生传感器，热辐射测量仪等方面具有潜在的应用。通过比较实验和模拟，发现第一，第二和第五峰值具有较小的吸收误差和频率偏差，而第三和第四峰值具有较大的吸收误差和频率偏差。五频带吸收器在多频带电磁隐身，仿生传感器，热辐射测量仪等方面具有潜在的应用。