A thin laminated composite is proposed in this article for highly efficient microwave absorption at both high frequency and low frequency. It is composed of two layers of carbon-fiber-reinforced planar structure. In each layer, periodically arranged fiber array with the axes of the fibers parallel to each other is embedded into a ceramic matrix which is used to bind the fibers together and to provide necessary mechanical or chemical properties. Stacking up two layers of the planar structure with the fibers in different layers orientated into different directions produces a lamina which can be further parallely stacked up to provide the whole laminated material. The influence of the structural and electromagnetic parameters on the microwave absorption efficiency is first studied in detail with scattering matrix and boundary-mode matching method. Then the genetic algorithm and the sequential quadratic programming methods are used to form a two-step strategy based on the mode-matching method to optimize the structural and electromagnetic parameters for a highly efficient microwave absorption in both high-frequency and low-frequency bands. Numerical examples are also given to demonstrate the high absorption efficiency of the designed laminated material.

中文翻译：

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一种结构简单的薄碳纤维增强材料，可高效吸收微波

本文提出了一种薄层压复合材料，可在高频和低频下高效吸收微波。它由两层碳纤维增强的平面结构组成。在每一层中，纤维轴彼此平行的周期性排列的纤维阵列被嵌入陶瓷基体中，该陶瓷基体用于将纤维粘合在一起并提供必要的机械或化学特性。将平面结构的两层堆叠起来，其中不同层中的纤维被定向成不同的方向，从而产生可以进一步平行堆叠以提供整个层压材料的薄层。首先用散射矩阵和边界模式匹配方法详细研究了结构和电磁参数对微波吸收效率的影响。然后利用遗传算法和序列二次规划方法形成基于模式匹配方法的两步策略，以优化结构和电磁参数，以实现高频和低频波段的高效微波吸收。还给出了数值例子来证明设计的层压材料的高吸收效率。