Abstract
In this paper, a planar OAM reconfigurable plasma reflective metasurface with size 30 × 30 cm2 is designed. It consists of the reconfigurable plasma metasurface reflector and a feed horn antenna. The phase distribution of the plasma reflective metasurface combines the OAM phase distribution and the beam focusing required phase distribution. The required phase shifting range is 360° which obtained by adjusting the plasma frequency with changing the applied DC biasing voltage for the argon gas. The advantages of the design are high gain 22.4 dBi, narrow divergence angle 5°, high purity, good stability, planar structure, and easy fabrication. Beam scanning using the reflective metasurface for l = 1 at (θ = φ = 0°), (θ = 10°, φ = 0°), (θ = 20°, φ = 0°) and (θ = 30°, φ = 0°) is demonstrated.
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