Flexible microwave absorber (MAR), vital in advanced applications such as wearable electronics and precision devices, are highly valued for their lightweight, exceptional electromagnetic waves (EWs), and ease of fabrication. However, optimizing the electromagnetic parameters of microwave absorption materials (MAMs) to enhance absorption ability and expand effective absorption broadband (EAB, reflection loss (RL) <−10 dB) is a considerable challenge. Herein, a permittivity‐attenuation evaluation diagram (PAED) is constructed using parameter scanning based on the Materials Genome Initiative to determine the ideal electromagnetic parameters and thickness, optimize absorption efficiency, and obtain highly efficient absorbers. Guided by the PAED, a multilayer MAR consisting of a “matching‐absorption‐reflection layer” and a dielectric loss gradient aligned with the direction of EWs propagation is developed. This design significantly enhances the EWs penetration and ensures effective absorption, attributed to the well‐matched impedance and attenuation characteristics. As anticipated, the microwave absorption of the absorber (density = 0.063 g cm−3) is optimized, with an RL of −34 dB at d = 4 mm and an EAB covering the entire X‐band (8.2–12.4 GHz). This study presents a novel approach for establishing a material database for MAMs and developing high‐performance absorbers characterized by thinness, lightness, broad operational frequency range, and robust absorption capacity.

中文翻译：

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具有定制吸收性能的梯度多层微波吸收体的仿真引导设计

柔性微波吸收器 (MAR) 在可穿戴电子产品和精密设备等先进应用中至关重要，因其重量轻、卓越的电磁波 (EW) 和易于制造而受到高度重视。然而，优化微波吸收材料（MAM）的电磁参数以增强吸收能力并扩大有效吸收宽带（EAB，反射损耗（RL）<−10 dB）是一个相当大的挑战。在此，利用基于材料基因组计划的参数扫描构建介电常数衰减评估图（PAED），以确定理想的电磁参数和厚度，优化吸收效率，并获得高效吸收体。在 PAED 的指导下，开发了由“匹配吸收反射层”和与电波传播方向一致的介电损耗梯度组成的多层 MAR。由于良好匹配的阻抗和衰减特性，这种设计显着增强了电子波的穿透力并确保有效的吸收。正如预期的那样，吸收体的微波吸收（密度 = 0.063 g cm−3）经过优化，RL 为 -34 dBd= 4 mm 且 EAB 覆盖整个 X 频段 (8.2–12.4 GHz)。这项研究提出了一种建立 MAM 材料数据库和开发高性能吸波材料的新方法，该吸波材料具有薄、轻、工作频率范围宽和吸收能力强等特点。