Wideband RCS reduction of thin metallic edges mediated by spoof surface plasmon polaritons Xinghua Li, Mingde Feng, Jiafu Wang, Xinmin Fu, Yajuan Han, Sai Sui, Yongqiang Pang and Shaobo Qu EPJ Appl. Metamat., 8 (2021) 8 Published online: 08 February 2021 DOI: 10.1051/epjam/2020018