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Surface current distributions of the single-layered pattern for forward propagating (a,b) v- and (c) u-polarized waves at resonant frequencies of 17.5 GHz, 21.5 GHz and 11.2 GHz, respectively. The schematic current distribution is represented by colors on the metallic patterns (red for front SRR, blue for cut-wire, and brown for back SRR). The direction of current flow is indicated by arrows.
