Suppression of Specular Reflections by Metasurface with Engineered Nonuniform Distribution of Reflection Phase

Figure 3

Reflecting element characterizing three-layer stacked square patches of variable size. (a) Oblique view. (b) Elevation view and side view. In the elevation view, the second and third substrate layers are omitted to show all the three patch layers clearly. (c) Typical design curve relating reflection phase at 4 GHz with the dimension for the stacked-patch elements with certain specifications.

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