Unlock the Potentials of Large-Element-Spacing Arrays:A Meta-Lens Solution for Grating-Lobe Suppression and Gain Enhancement  

作　　者：Zhengmei Wang Shan Lin Yuehe Ge Zhizhang(David)Chen Jingjing Zhao Jiahong Chen Ziheng Zhou Trevor S.Bird 

机构地区：[1]College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China [2]Motorola Mobile Internet Techbology(Xiamen)Co.,Ltd,Xiamen 361006,China [3]Department of Electrical and Computer Engineering,Dalhousie University,Halifax,NS B3H 4R2,Canada [4]University of Technology Sydney,Ultimo NSW 2007,Australia

出　　处：《Electromagnetic Science》2024年第4期35-49,共15页电磁科学(英文)

基　　金：National Natural Science Foundation of China(Grant Nos.62071187,62071125,and 62301162);Natural Science Foundation of Fujian Province,China(Grant No.2023J01058);Industry-Education Cooperation Project in Fujian Province,China(Grant No.2022H6018);Fujian Province Major Special Topic Project(Grant No.2022HZ026007).

摘　　要：Large-element-spacing(LES)antenna arrays present an attractive proposition with their cost-effectiveness and sim-plified structures.However,they often encounter the challenge of high-level grating lobes.This paper proposes a novel meta-lens methodology to effectively address the grating lobe issue in fixed-beam LES arrays.The proposed approach involves strategically positioning a meta-lens above the LES arrays at a suitable vertical distance.This setup enables precise manipulation and compen-sation of the near-field phase,resulting in the suppression or elimination of grating lobes without introducing additional design com-plexity.Comprehensive theoretical analyses,meticulous design calculations employing efficient numerical methods,rigorous field simulations,and practical experiments are conducted.The results demonstrate that our meta-lens solution achieves significant grating-lobe suppressions and substantial gain enhancements with only a marginal increase in system profile or volume.The proposed meta-lens approach is versatile and applicable to various LES antenna arrays,including sparse/thinned arrays,regardless of their size,element spacing,and configuration(uniform or non-uniform,periodic or aperiodic).

关 键 词：Gain enhancement Grating-lobe suppression Large-element-spacing antenna array Meta-lens Metasurface Sparse array Thinned array 

分 类 号：TN2[电子电信—物理电子学]