From a practical point of view, a broadband radar absorbing sandwich structure (RAS) consisting of a glass fiber reinforced polymer (GFRP), a foam core, and a periodic pattern surface (PPS) was developed using the proposed equivalent pattern modeling method (EPMM). As implementable sheet resistance is limited by the electrical properties of conductive ink and the fabrication method, the design flexibility of PPS can be reduced. The EPMM allows a more flexible design with limited sheet resistance values. Using the EPMM, the initial pattern design with a sheet resistance was replaced with an implementable sheet resistance and a modified pattern. The – 10 dB bandwidth of the broadband RAS, which is designed using an equivalent pattern converted through the EPMM, was about 10 GHz. To demonstrate the proposed design method, the designed broadband RAS was fabricated using an autoclave process and measured using a free-space measurement system. The measurement result was well matched with the design, and the EPMM was confirmed to work well. From this study, it was confirmed that the proposed EPMM could extend the implementable range of sheet resistance that can be implemented as a material, thereby contributing to the implementation of more practical and high performance RAS.

中文翻译：

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周期花纹面等效花纹建模方法及其在宽带吸波夹层结构中的应用

从实用的角度来看，使用所提出的等效模式建模方法（EPMM）开发了一种由玻璃纤维增​​强聚合物（GFRP）、泡沫芯和周期模式表面（PPS）组成的宽带雷达吸波夹层结构（RAS）。 ）。由于可实现的薄层电阻受到导电油墨的电性能和制造方法的限制，因此 PPS 的设计灵活性会降低。EPMM 允许以有限的薄层电阻值进行更灵活的设计。使用 EPMM，具有薄层电阻的初始图案设计被可实施的薄层电阻和修改后的图案所取代。使用通过 EPMM 转换的等效模式设计的宽带 RAS 的 –10 dB 带宽约为 10 GHz。为了演示所提出的设计方法，设计的宽带 RAS 是使用高压釜工艺制造的，并使用自由空间测量系统进行测量。测量结果与设计匹配良好，确认EPMM工作良好。从这项研究中证实，所提出的 EPMM 可以扩展可作为材料实施的薄层电阻的可实施范围，从而有助于实施更实用和高性能的 RAS。