基于偏振转换技术的传输模式中的宽带高效3位编码元表面
Majid Karimipour1, Mohammad Bagher Heydari2,3, Iman Aryanian4
1Department of Electrical Engineering, Arak University of Technology, Arak, Iran. m.karimipour@arakut.ac.ir.
Scientific reports
|July 12, 2023
概括
本研究介绍了一种新的多态编码元表面,可以显著提高传输聚焦元表面 (TFM) 的操作带宽和光圈效率. 新设计实现了29%的带宽和53.6%的光圈效率,克服了TFM技术的关键局限性.
科学领域:
- 电磁学 电磁学 电磁学 电磁学
- 超材料是什么?超材料是什么?
- 天线工程天线工程
背景情况:
- 传输聚焦元面 (TFM) 面临的挑战是有限的操作带宽和光圈效率.
- 同时提高TFM的带宽和效率是该领域的一个重大障碍.
研究的目的:
- 引入一种新的多状态编码元面,旨在克服传统TFM的带宽和光圈效率限制.
- 通过结合系统级和元素级合成方法来证明具有增强辐射特性的TFM.
主要方法:
- 在系统级设计中采用多频相合成 (MFPS) 方法,优化整个操作频段的相误差.
- 在元素层面使用基于偏振控制传输 (PCT) 的宽带技术,采用低波长非共振设计,在两个介电层上采用C形金属图案.
- 实现了一个优化算法,以平衡增益变化和光圈效率.
主要成果:
- 开发的超表面元件在12.316.5 GHz频段实现了高传输幅度 (>0.9) 的旋转偏振.
- 一个制造的25x25元件TFM显示了1dB的增强带宽为29% (12.316.5 GHz).
- 在12.8GHz时,最大测量的光圈效率达到53.6%.
结论:
- 拟议的多状态编码元表面有效地提高了频率带宽和光圈效率.
- 使用MFPS和PCT技术的新型TFM设计,代表了宽带,高效率超表面应用的重大进步.
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