We present a simulation of the effective electromagnetic (EM) parameters of a carbonyl iron (CI) powder - polyurethane (PU) composite based on a realistic micrometer-level 3-dimensional model by fractions. CI particles, 10 × 10 × 10, were randomly modeled in a PU matrix, and the optimized meshing condition was adapted to simulation. The calculated effective complex permittivity and permeability were compared with the classical mixing formulas and measurements of prepared CI-PU samples to verify the simulation results. Studies of the local EM field distribution and a parametric analysis of the composite revealed how the randomly distributed particles behaved differently than periodic particles. This study shows the possibility of designing a composite material based on a full-wave simulation.

中文翻译：

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粒子-基体复合材料有效电磁特性的计算研究和实验验证

我们基于真实的微米级 3 维模型对羰基铁 (CI) 粉末 - 聚氨酯 (PU) 复合材料的有效电磁 (EM) 参数进行了模拟。10 × 10 × 10 的 CI 粒子在 PU 矩阵中随机建模，优化的网格条件适用于模拟。将计算出的有效复介电常数和渗透率与经典混合公式和制备的 CI-PU 样品的测量值进行比较，以验证模拟结果。局部电磁场分布的研究和复合材料的参数分析揭示了随机分布的粒子的行为与周期性粒子的不同。该研究显示了基于全波模拟设计复合材料的可能性。