WANG Dongdong,DU Guohong,SUN Xiaofeng,et al.Research on Near-field Focusing based on Reflective Metasurface[J].Journal of Chengdu University of Information Technology,2021,36(06):592-595.[doi:10.16836/j.cnki.jcuit.2021.06.002]
基于反射型超表面的近场聚焦研究
- Title:
- Research on Near-field Focusing based on Reflective Metasurface
- 文章编号:
- 2096-1618(2021)06-0592-04
- 分类号:
- TN822
- 文献标志码:
- A
- 摘要:
- 首先设计了一种新型反射型超表面单元,在频段8～15 GHz单元反射系数相位范围均超过360°,在15 GHz可达到700°,能够满足任意方向聚焦对超表面单元相位的需求。由于单元结构的中心对称性,其具有极化不敏感特性。其次,设计了一种由27×27个单元所组成,尺寸为405 mm×405 mm且工作在10 GHz的相位梯度超表面。该超表面采用喇叭空馈电磁波的方式,实现超表面反射波在辐射近场区域产生焦点。最后,通过仿真实验证实了当引入不同极化入射波时,超表面反射聚焦效果保持在稳定水平。该研究在无线输能、近场通信和探测等领域具有潜在应用价值。
- Abstract:
- In this paper, a new type of reflective metasurface unit is designed. The range of the reflection coefficient phase of the unit is over 360° in the frequency band of 8-15 GHz and can reach 700° at 15 GHz. The proposed design can meet the requirements of the metasurface unit phase to achieve focusing in any direction. Due to the central symmetry of the unit structure, it has the characteristics of polarization insensitivity. Then, a phase gradient metasurface with a size of 405 mm×405 mm is comprised of 27×27 units and it can work at 10 GHz. Using the air-fed method, the electromagnetic wave reflected by the designed metasurface can form a focal point in the near-field area. At last, simulation experiments prove that when incident waves with different polarizations are considered, the focusing effect of reflective metasurface remains at a stable level. This research has potential application value in the fields of wireless energy transmission, near-field communication and detection.
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备注/Memo
收稿日期:2021-09-15
基金项目:四川省科技厅重点研发资助项目(2020YFG0187、2021YF G0355)