Figure 5
From: Broadband Frequency-Selective Spoof Surface Plasmon Polaritons on Ultrathin Metallic Structure
The simulated transmission coefficients (S21) with different strip gaps (g1) and numbers of coupling unit cells (n).
(a) The black, red and blue lines correspond to g1 = 1 mm, 1.5 mm and 2 mm, respectively, in which n = 4 is fixed. (b) The black, red and blue lines correspond to n = 4, 3 and 2, respectively, in which g1 = 1 mm is fixed.
