Compact and Wideband Octuple-Mode Filter Based on Hybrid Substrate Integrated Waveguide and Spoof Localized Surface Plasmon Structure. - Zhang-Biao Yang; Dongfang Guan; Xianjun Huang; Hao Chi Zhang; Peng You; Shen-Da Xu; Li Liu; Shaowei Yong (IEEE Trans. Circuits Syst., 2020)