Electromagnetic wave radiation has adverse health effects on humans and can hamper nearby electronic devices’ regular operations. Therefore, the need to develop new materials with a substantial wave absorption property, a broad absorption bandwidth in a wide incident angle, and lightweight is of enormous technological interest worldwide. Here we report the experimental frequency-dependent permittivity and permeability behaviors of the composite consisting of Fe₃O₄ multi-granular nanoclusters (MGNCs) and multi-walled carbon nanotubes (MWCNTs). We also apply the results for the starting point for the gradient honeycomb structure design and optimization. We study the effect of the tilted angle on the reflection loss (RL) by finite element analysis (FEM). We obtain a flat RL over the X-band for the regular honeycomb structure with a 0° tilted angle. An increase in the tilted angle from 0° to 4° increases the RL, and a peak is formed at the maximum tilted angle of 4°. Coating the regular honeycomb structure with a thin layer of MGNC/MWCNT enhances the electromagnetic shielding (EMI). Furthermore, as tilted angle increases for the coated honeycomb structure from 0° to 4°, SE increases dramatically over the frequency range from 8.2 to 12.4 GHz at incident wave angles of 0° and 90°.

电磁波辐射会对人体产生不利的健康影响，并会妨碍附近电子设备的正常运行。因此，需要开发具有显着的波吸收特性，在宽入射角下具有宽吸收带宽并且重量轻的新材料，这在世界范围内具有巨大的技术兴趣。在这里，我们报告了由Fe ₃ O ₄组成的复合材料的实验频率相关介电常数和磁导率行为多颗粒纳米簇（MGNC）和多壁碳纳米管（MWCNT）。我们还将结果用作梯度蜂窝结构设计和优化的起点。我们通过有限元分析（FEM）研究了倾斜角度对反射损耗（RL）的影响。对于倾斜角度为0°的常规蜂窝结构，我们在X波段上获得平坦的RL。倾斜角从0°增大到4°会增加RL，并且在最大倾斜角4°处会形成一个峰。在常规蜂窝结构上覆盖一层MGNC / MWCNT薄层可增强电磁屏蔽（EMI）。此外，随着涂覆蜂窝状结构的倾斜角从0°增大到4°，在入射波角度为0°和90°时，SE在8.2至12.4 GHz的频率范围内急剧增加。