Spoof surface plasmon-based bandpass filter with extremely wide upper stopband

Liu Xiaoyong^{1, 2}, Zhu Lei^{2, †,}, Feng Yijun^{1, ‡,}

The simulated electric field E_y distributions on the surface of the filter at the frequencies of (a) 2.28 GHz, (b) 5 GHz, and (c) 9 GHz, respectively.