Abstract In this study, an equivalent circuit model and ray tracking method were used to predict the electromagnetic characteristics of curved radar-absorbing structures (RASs) applied with a frequency selective surface (FSS). After performing an electromagnetic analysis of FSS using a unit cell model, an equivalent circuit model reflecting the characteristics of the FSS was constructed. The equivalent circuit model of the FSS was applied to an equivalent circuit model for the RAS to evaluate the absorption performance as a function of the curvature and incident angle. Electromagnetic characteristics of the curvature structure were predicted by estimating the path of the electromagnetic wave using the ray tracking method. The calculated results were compared with the experimental results using free space measurements. Through this study, it was possible to estimate an equivalent circuit model reflecting the electromagnetic characteristics of the RAS with respect to the incident angle and curvature of the FSS. In addition, the electromagnetic performance of the entire curved structure was evaluated using the ray tracking method.

中文翻译：

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基于等效电路模型和射线跟踪方法的曲面吸波结构电磁性能预测与验证

摘要 在本研究中，采用等效电路模型和射线跟踪方法预测了应用频率选择表面（FSS）的弯曲雷达吸波结构（RAS）的电磁特性。使用晶胞模型对 FSS 进行电磁分析后，构建了反映 FSS 特性的等效电路模型。将 FSS 的等效电路模型应用于 RAS 的等效电路模型，以评估作为曲率和入射角函数的吸收性能。通过使用射线跟踪方法估计电磁波的路径来预测曲率结构的电磁特性。计算结果与使用自由空间测量的实验结果进行了比较。通过这项研究，可以估计等效电路模型，该模型反映了 RAS 相对于 FSS 的入射角和曲率的电磁特性。此外，使用射线跟踪方法评估了整个弯曲结构的电磁性能。