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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.

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