Metamaterials have attracted enormous interest in the perfect absorber. In sharp contrast to most previous studies focused on improving absorption coefficient and expanding absorption bandwidth, this article presents an optimal design approach that enhances the robustness of absorption bandwidth to several hard-to-control variables. The split ring resonator (SRR) was used as an optimizable object to illustrate this approach. Unlike the traditional design method for metamaterial absorbers, which pays attention to the construction of equivalent circuit models and the effect of lumped parameters on the performance index, this article uses the decoupling analysis to establish the mapping between structural parameters and the performance index. The concept of factor effect and interaction effect is introduced to describe the decoupling analysis, and the impact of each factor on the signal-to-noise ratio (SNR) of absorption bandwidth is analyzed. Compared to the original design, the robustness of the optimal design is improved. The predicted result obtained by decoupling analysis and the simulated result shows a good agreement.

中文翻译：

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超材料吸波器鲁棒设计中结构参数的解耦分析


超材料引起了人们对完美吸波器的巨大兴趣。与之前大多数专注于提高吸收系数和扩大吸收带宽的研究形成鲜明对比，本文提出了一种优化设计方法，可增强吸收带宽对几个难以控制的变量的鲁棒性。开口环谐振器 (SRR) 被用作可优化对象来说明这种方法。与传统的超材料吸波器设计方法注重等效电路模型的构建以及集总参数对性能指标的影响不同，本文采用解耦分析来建立结构参数与性能指标之间的映射。引入因素效应和交互效应的概念来描述解耦分析，分析各因素对吸收带宽信噪比（SNR）的影响。与原始设计相比，优化设计的鲁棒性有所提高。解耦分析得到的预测结果与仿真结果吻合较好。