Hao Jianjiao, Ye Fuju, Ruan Ying, Chen Lei, Cui Haoyang
College of Electronics and Information Engineering, Shanghai University of Electric Power, No. 2588 Changyang Road, Yangpu District, Shanghai 200090, China.
Materials (Basel). 2022 Aug 26;15(17):5913. doi: 10.3390/ma15175913.
Metamaterials, or metasurfaces, allow the flexible and efficient manipulation of electromagnetic (EM) wave. Although the passive coding metasurfaces have achieved a great deal of functionality, they also need a complex design process. In this paper, we propose Hilbert-coding metasurfaces for flexible and convenient EM regulation by arranging Hilbert-coding metamaterial units of different orders. To demonstrate this behavior, we designed 12 metasurfaces, then fabricated and measured 6 samples. Validation results on 6 Hilbert-coding metasurfaces show the deflection angles of the four single beam patterns obtained are about 21°, 13°, 12°, and 39°, with energy values of 7.75 dB, 7.3 dB, 7.2 dB, and 7.7 dB, respectively, and the deflection angles of the dual-beam patterns are 28.5° and 20° with energy values of 10.05 dB and 11.4 dB, respectively. The results are quite consistent with the simulation data, further confirming the feasibility of our idea. In addition, there are potential applications in Wireless Communications and Radar-imaging, like EM beam scanning and EM field energy distribution control in communication and imaging scenarios.
超材料或超表面能够灵活且高效地操控电磁波。尽管无源编码超表面已实现了诸多功能，但它们也需要复杂的设计过程。在本文中，我们通过排列不同阶数的希尔伯特编码超材料单元，提出了用于灵活便捷电磁调控的希尔伯特编码超表面。为证明这一特性，我们设计了12个超表面，随后制作并测量了6个样品。对6个希尔伯特编码超表面的验证结果表明，所获得的四种单波束图案的偏转角分别约为21°、13°、12°和39°，能量值分别为7.75 dB、7.3 dB、7.2 dB和7.7 dB，双波束图案的偏转角分别为28.5°和20°，能量值分别为10.05 dB和11.4 dB。结果与模拟数据相当吻合，进一步证实了我们想法的可行性。此外，在无线通信和雷达成像方面有潜在应用，如在通信和成像场景中的电磁波束扫描和电磁场能量分布控制。
