【作者】 陈爽爽； 刘人玮； 连川翔； 耿源； 赵延文； 杨德强；

【Author】 Shuangshuang Chen;Renwei Liu;Chuanxiang Lian;Yuan Geng;Yanwen Zhao;Deqiang Yang;University of Electronic Science and Technology of China;

【机构】 电子科技大学；

【摘要】 本文提出了一种基于惠更斯表面的毫米波贝塞尔波束。通过上下反对称的单元连通型"几"字形结构产生具有四个惠更斯谐振模式的透射单元,该单元具有高透射性能和360°相位覆盖能力。通过3bit量化的方式设计了一款能够产生贝塞尔波束的超表面。在入射波的照射下,该超表面能够产生具有高准直性和自愈合特性的毫米波贝塞尔波束。仿真验证表明,所设计的贝塞尔波束具有较强的自我愈合性,+2阶涡旋模态纯度大于60%,符合高阶贝塞尔波束典型特征。这种波束设计不仅可有效提高频谱利用率,而且具有更高的安全性。更多还原

【Abstract】 In this paper,a millimeter-wave Bessel beam based on a Huygens’ metasurface is proposed.A transmission unit with four Huygens resonance modes is generated by a top-and bottom-antisymmetric unit-connected "几" structure,which has high transmission performance and 360° phase coverage.A metasurface capable of generating Bessel beams is designed by means of 3 bit quantization.The metasurface is capable of generating millimeter-wave Bessel beams with high collimation and self-healing properties under incident wave irradiation.Simulations show that the designed Bessel beam has strong self-healing properties,and the purity of the+2 nd-order vortex modes is more than 60%,which is in line with the typical characteristics of high-order Bessel beams.This beam design not only effectively improves the spectrum utilization,but also has higher safety.更多还原