超材料
材料科学
宽带
光学
超材料吸收剂
吸收(声学)
超透镜
微波食品加热
电磁屏蔽
光电子学
导电体
电磁辐射
宽带
雷达
计算机科学
物理
电信
复合材料
可调谐超材料
作者
Zongguo Yang,Xiaoming Liu,Yimin Hua,Caiyi Liu,Zhenyu Zhang,Zhiyu Ren,Shuang Yuan,Qiang Wang
摘要
Artificially designed metamaterial structures can manipulate electromagnetic waves, endowing them with exotic physical properties that are not found in natural materials, such as negative refractive index, superlens, and inverse Doppler effect. These characteristics are widely applied in various engineering and military applications. Due to increasingly complex application environments and innovation in radar detection technology, the combination of broadband absorption performance under thin thickness and efficient preparation methods at low cost is often the focus of research on new generation stealth materials. Here, we propose Al@SiO2 composite conductive film metamaterial (Al@SiO2 CCFM) to achieve wideband absorption of electromagnetic waves. This metamaterial structure combines two resonant units, resulting in three absorption bands in the absorption curve. The results show that the absorption rate of the metamaterial is above 90% in the frequency range of 10.6 GHz to 26.0 GHz. The resonance mechanism between multiple structures is a prerequisite for achieving wideband absorption. The materials Al and SiO2 used in Al@SiO2 CCFM are inexpensive and abundant, and the fabrication method is simple. Therefore, they hold great potential for large-scale applications in the multispectral stealth and electromagnetic shielding field.
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