Three-Mode Vortex Wave Generator with Double-Layer Patch Antennas

Figure 6

Simulated patterns of generator with different radiuses of array.

(a) a=18.3mm; mode 0

(b) a=18.3mm; mode 1, -1

(c) a=14.8mm; mode 0

(d) a=14.8mm; mode 1, -1