Abstract High-efficiency microwave absorption materials are widely used in electronic equipment and communication facilities. This study aims to develop a broad-bandwidth metamaterial absorber based on the magnetic substrate with a central frequency selective surface (FSS). It is however, different from the strategy of expanding the bandwidth for metamaterial absorbers reported in other literatures, in this study, a unique development strategy that involves selecting the most suitable magnetic substrate from a database using genetic algorithm is adopted. By adding an optimized FSS layer to the magnetic substrate, its loss performance and impedance matching performance are considerably improved, and the resulting metamaterial absorber exhibits excellent absorption properties. At a thickness of 3.1 mm, the reflection loss in the range from 2.5 to 17.2 GHz is below –10 dB, which is significantly better than the values reported in previous studies. In addition, the prepared metamaterial absorber possesses excellent absorption characteristics under oblique incidence conditions. The strategy proposed in this study leads to the successful development of a high-efficiency metamaterial absorber and represents a more effective approach than those previously used in the field.

中文翻译：

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基于遗传算法的磁性基底超薄宽带超材料吸收体的设计与制备

摘要 高效吸波材料广泛应用于电子设备和通讯设施中。本研究旨在开发一种基于具有中心频率选择表面 (FSS) 的磁性衬底的宽带超材料吸收器。然而，与其他文献报道的扩展超材料吸收器带宽的策略不同，本研究采用了一种独特的开发策略，包括使用遗传算法从数据库中选择最合适的磁性基板。通过在磁性基板上添加优化的FSS层，其损耗性能和阻抗匹配性能得到显着改善，所得超材料吸收体表现出优异的吸收性能。在 3.1 毫米的厚度下，反射损耗在 2.5 到 17 的范围内。2 GHz 低于 –10 dB，明显优于之前研究报告的值。此外，制备的超材料吸收体在斜入射条件下具有优异的吸收特性。本研究中提出的策略导致了高效超材料吸收器的成功开发，并且代表了一种比该领域以前使用的方法更有效的方法。