Figure 3

Numerical simulation and experimental verification.

(a) Simulated polarization conversion ratio from LCP to RCP (blue line) and measured polarization conversion ratio from x- to y-polarization (red asterisk). (b) Photograph of the fabricated metasurface. (c) Simulated reflection amplitude of x- and y-polarization. (d) Simulated reflection phase of x- (blue solid line) and y-polarization (blue dash line), which sharing almost the same constant gradient between 3.5 GHz and 16.5 GHz. There are five intersection points between the simulated phase difference and constant π, which corresponds to the five conversion extrema in (a). In the green shaded area, the phase difference changes severely from π to 0 or 2π, corresponding to the sharp band edges.