Potential radar absorbing material (RAM) for suppressing electromagnetic (EM) wave over a range of oblique angles of incidence are needed in many applications. In this article, an attempt is being made to build cost-effective and efficient RAM using the EM characterization of microwave heat-treated (MHT) electronic waste followed by an EM mixing model-assisted analytical approach. The robust and facile top-down fabrication technique is employed for the development of heterogeneous composites, which are further subjected to microwave heat treatment at distinct power wattages. The magneto-dielectric spectrographic analysis of samples is carried out in the range of 8.2 to 12.4 GHz. The Debye parameters are optimized and succeeded to obey EM property of the synthesized samples. Jaya's algorithm is adopted for the optimal design of single and dual-layer RAMs at normal and oblique angle incidence based on the constitutive EM parameters under certain restrictive conditions. The embraced MHT method prompts an improvement in microstructure coherency that further increases absorption bandwidth (BW). As a result, a 2.1 mm thick single layer RAM achieves a minimum reflection coefficient (RC) of −17.1 dB at 10.3 GHz with a 100% BW below −10 dB threshold. The groundbreaking findings are obtained by performing a three-fold study of dual-layer RAMs, culminating a minimum RC of −47.8 dB at 11.8 GHz with a layer thickness of 1.8 mm. This article shows that the microwave heat-treated composites have enormous potential in the development of lightweight and broadband RAMs for stealth applications.

中文翻译：

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利用电磁混合模型辅助优化策略的微波热处理电子废物构成X波段雷达吸收结构

许多应用都需要潜在的雷达吸波材料 (RAM)，用于在一定的倾斜入射角范围内抑制电磁 (EM) 波。在本文中，正在尝试使用微波热处理 (MHT) 电子废物的 EM 表征和 EM 混合模型辅助分析方法来构建经济高效的 RAM。稳健且简便的自上而下制造技术被用于开发异质复合材料，这些复合材料在不同功率下进一步进行微波热处理。样品的磁介电光谱分析在 8.2 至 12.4 GHz 的范围内进行。德拜参数被优化并成功地服从合成样品的电磁特性。贾亚 在一定的限制条件下，基于本构EM参数，采用s算法对垂直和斜角入射的单层和双层RAM进行优化设计。所采用的 MHT 方法促进了微观结构相干性的改进，从而进一步增加了吸收带宽 (BW)。因此，2.1 毫米厚的单层 RAM 在 10.3 GHz 下实现了 -17.1 dB 的最小反射系数 (RC)，并且 100% 带宽低于 -10 dB 阈值。突破性的发现是通过对双层 RAM 进行三重研究获得的，最终在 11.8 GHz 频率下具有 -47.8 dB 的最小 RC，层厚为 1.8 mm。本文表明，微波热处理复合材料在开发用于隐身应用的轻型和宽带 RAM 方面具有巨大潜力。