Research / 2019 / Article / Fig 8

Research Article

A Small-Divergence-Angle Orbital Angular Momentum Metasurface Antenna

Figure 8

(a) Setup of the OAM beam measurement, (b) complete fabricated structure of the metasurface antennas with and 2, (c) measured near-field phase distributions of the OAM beams, and (d) measured near-field intensity distributions of the OAM beams.