超宽带微波超材料吸收器具有介电损耗层
Ying Zhang1,2, Xin Wang3,4, Suhui Yang1,2
1School of Optics and Photonics, Beijing Institute of Technology, Beijing, 100081, China.
Scientific reports
|April 11, 2025
概括
这项研究介绍了一种超宽带的元材料吸收器,它使用了一种有损失的元介电层. 这种新的设计在广泛的微波频率范围内实现了90%以上的吸收,显示了隐形应用的潜力.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
背景情况:
- 超材料吸收器对于能源采集和隐形技术等应用至关重要.
- 在角不敏感的情况下实现超宽带吸收仍然是一个挑战.
研究的目的:
- 提出和演示一个超宽带微波超材料吸收器.
- 为了增强吸收带宽,在不同的入射角度下保持性能.
主要方法:
- 设计了一种具有损失的元疏电层 (带电阻墨的PLA) 的元材料吸收器.
- 调整了电阻墨水涂层,以匹配阻抗与空气,以增强吸收.
- 进行模拟并制造出用于实验验证的原型.
主要成果:
- 从4.4到60 GHz达到90%以上的吸收率 (相对带宽为173%).
- 证明了具有最小峰值波动 (0.053) 的均吸收性.
- 显示出对入射角度的不敏感性,在45°保持95%的平均吸收率.
结论:
- 拟议的超材料吸收器提供超宽带吸收和广角稳定性.
- 在PLA元层上的电阻油墨涂层是提高性能的关键.
- 该设计显示了飞行器隐形应用的巨大潜力.
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