Recent developments of metamaterials/metasurfaces for RCS reductionYa Fan, Jiafu Wang, Xinmin Fu, Yongfeng Li, Yongqiang Pang, Lin Zheng, Mingbao Yan, Jieqiu Zhang and Shaobo QuEPJ Appl. Metamat., 6 (2019) 15DOI: https://doi.org/10.1051/epjam/2019008