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Equivalent pattern modeling method of periodic pattern surface and its application to the broadband radar absorbing sandwich structure
Advanced Composite Materials ( IF 2.9 ) Pub Date : 2020-04-09
Won-Ho Choi, Woon-Hyung Song, Won-Jun Lee

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:

周期性图案表面的等效图案建模方法及其在宽带雷达吸收夹层结构中的应用

从实际的角度来看,使用提议的等效模式建模方法(EPMM)开发了由玻璃纤维增​​强聚合物(GFRP),泡沫芯和周期性图案表面(PPS)组成的宽带雷达吸收夹心结构(RAS) )。由于可实现的薄层电阻受导电油墨的电性能和制造方法的限制,因此可以降低PPS的设计灵活性。EPMM可以在有限的薄层电阻值下实现更灵活的设计。使用EPMM,将具有薄层电阻的初始图案设计替换为可实现的薄层电阻和修改后的图案。宽带RAS的– 10 dB带宽大约是10 GHz,它使用通过EPMM转换的等效模式进行设计。为了演示建议的设计方法,设计的宽带RAS使用高压釜工艺制造,并使用自由空间测量系统进行测量。测量结果与设计非常吻合,并确认EPMM效果良好。从这项研究中,可以确认,提出的EPMM可以扩展薄层电阻的可实施范围,该薄层电阻可以作为一种材料来实现,从而有助于实现更实用和高性能的RAS。

更新日期:2020-04-09
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