设计和制造用于航空航天隐形应用的六方格频率选择性表面吸收器
Priyanka1, Subrat Mohanty1, Prashant S Alegaonkar1
1Department of Physics, School of Basic Sciences, Central University of Punjab, Bathinda, Punjab 151401, India.
ACS applied materials & interfaces
|July 21, 2023
概括
本研究介绍了一种用于先进隐形技术的新型集成频率选择性表面 (IFSS) 吸收器. 开发的紧吸收器在宽带宽 (76%的分频带宽) 中实现了90%的吸收,具有出色的角度稳定性.
科学领域:
- 电磁兼容性和隐形技术的隐形技术
- 超材料和先进的吸收器设计.
- 微波和毫米波应用.
背景情况:
- 频率选择性表面 (FSS) 对隐形应用至关重要,要求增强带宽,极化不敏感性和角稳定性.
- 现有的FSS吸收器通常在厚度,带宽和制造复杂性方面面临限制.
- 集成FSS (IFSS) 吸收器提供了一个有希望的途径,在一个紧的形式因素中实现卓越的隐形性能.
研究的目的:
- 设计,模拟和制造一种具有增强隐形性能的新型IFSS吸收器.
- 为了实现广泛的操作带宽,高吸收效率和强大的角度稳定性.
- 通过模拟和实验测量来验证吸收器的性能.
主要方法:
- 设计FSS层,采用蜂结构,环状环和L形元素,优化特定的板材阻力.
- 将FSS层与损耗介电层层和碳织物增强塑料底层集成,以形成IFSS吸收器.
- 综合模拟包括反射损失,极化分析,位移电流,功率损失分布和复杂的入口.
- 在玻璃面料上使用碳基电阻墨水进行制造,并通过空空间和无声室测量进行后续性能评估.
主要成果:
- 设计的IFSS吸收器至少有10dB的反射损失,相当于90%的吸收率.
- 实现了76%的宽带宽,覆盖X和Ku频段.
- 在正常和角度配置 (0-60°) 下,模拟和实验结果之间的反射损失显示出良好的一致性.
- 吸收器保持有效的性能,其紧的厚度为1.9毫米 (0.05λL).
结论:
- 拟议的IFSS吸收器设计在隐形技术中提供了显著的进步,由于其宽带宽,高吸收率和角度稳定性.
- 紧而薄的设计,加上易于制造,使其适合于实际的航空航天应用.
- 成功的实验验证证证实了该IFSS吸收器在下一代隐形平台中的潜力.
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