Table 3 Crucial parameters of phase-gradient metasurfaces consisting of different numbers of elements
N | \(U_1\) | \(U_2\) | \(U_3\) | \(U_4\) | \(U_5\) | \(U_6\) | \(U_7\) | \(U_8\) | \(U_9\) | \(\eta\) (%) | P | \(\lambda\) | \(\theta\) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
3 | 0.144 | 0.183 | 0.204 | – | – | – | – | – | – | 69.6 | 1.65 | 1.536 | 68.58° |
4 | 0.080 | 0.155 | 0.172 | 0.203 | – | – | – | – | – | 84.1 | 2.0 | 1.455 | 46.68° |
5 | 0.111 | 0.146 | 0.158 | 0.171 | 0.190 | – | – | – | – | 92.8 | 2.5 | 1.491 | 36.61° |
6 | 0.113 | 0.144 | 0.158 | 0.179 | 0.180 | 0.211 | – | – | – | 96.2 | 3.0 | 1.529 | 30.64° |
7 | 0.120 | 0.137 | 0.150 | 0.170 | 0.176 | 0.192 | 0.214 | – | – | 85.8 | 3.5 | 1.547 | 26.23° |
8 | 0.089 | 0.120 | 0.149 | 0.150 | 0.164 | 0.169 | 0.185 | 0.198 | – | 88.9 | 4.0 | 1.483 | 21.76° |
9 | 0.110 | 0.140 | 0.143 | 0.159 | 0.166 | 0.172 | 0.181 | 0.197 | 0.200 | 86.3 | 4.5 | 1.491 | 19.35° |