Multi-Band Polarization-Insensitive Metamaterial Absorber for Microwave Based on Slotted Structure and Magnetic Rubber.
Multi-Band Polarization-Insensitive Metamaterial Absorber for Microwave Based on Slotted Structure and Magnetic Rubber.
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基于开槽结构和磁性橡胶的多波段偏振不敏感超材料微波吸收体
DOI：
10.3390/polym14081576
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发表时间：
2022-04-13
期刊：
影响因子：
5
通讯作者：
Weng, Xiaolong
中科院分区：
文献类型：
--
作者：
Li, Kai;Lu, Haipeng;Bi, Mei;He, Wentao;Qi, Lun;Zhou, Zhangrong;Weng, Xiaolong
关键词：
针对L波段、S波段、C波段、X波段和ku波段的应用，提出了一种基于开槽结构和磁性橡胶的五波段极化不敏感超材料吸波器（MMA）设计方法。顶层的开槽结构由两个方环演变而来，用于激发多共振。利用阻抗匹配原理估计了磁性橡胶基板的电磁参数范围，该电磁参数用于调节吸收器的等效阻抗以匹配不同频带的自由空间阻抗。根据估计的电磁参数制备并测量了一系列磁性橡胶衬底，其厚度仅为0.7 mm，满足薄化设计要求。当羰基铁粉掺杂量为200%时，吸收剂在1.7 GHz、3.87 GHz、5.96 GHz、9.4 ~ 10.4 GHz和14 GHz频段的吸收率均大于90%。测量的电磁参数与理论估计相吻合，验证了所提设计方法的准确性。
A design method of five-band polarization-insensitive metamaterial absorber (MMA) based on the slotted structures and the magnetic rubber is proposed for L-, S-, C-, X-, and Ku-band applications. The slotted structures of the top layer, which evolved from two square rings, are used to excite multi-resonance. The range of the electromagnetic (EM) parameters of a magnetic rubber substrate, which is used to adjust the equivalent impedance of the absorber to match the free space impedance in different bands, is estimated using the impedance matching principle. A series of magnetic rubber substrates based on the estimated EM parameters are prepared and measured, whose thickness is only 0.7 mm, meeting the thin design requirements. The absorption of the proposed absorber greater than 90% at 1.7 GHz, 3.87 GHz, 5.96 GHz, 9.4–10.4 GHz, and 14 GHz is achieved when the doping amount of the carbonyl iron powders is 200%. The absorbing performance of the absorber with measured EM parameter agrees well with the theoretical estimates, which validates the accuracy of the proposed design method.
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