Fig. 8

Surface current distributions on the metasurface at 21.14 GHz and 33.62 GHz: (a), (b), (c), and (d) show the current flow at 21.14 GHz for phase angles of 0°, 90°, 180°, and 270°, respectively; (e), (f), (g), and (h) illustrate the current flow at 33.62 GHz for the same phase angles.