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Design of metasurface super cell based on SRRs: (a) the SRR structure; (b) a reflection phase step 60° realized by 6 SRRs; (c) metasurface super cell composed of the six SRRs with l = 0, 1.5 mm, 2.4 mm, 2.9 mm, 3.55 mm, and 4.5 mm.
Simulation results of an infinite metasurface composed of the 6-SRR super cells: (a) reflection under normal incidence; (b) snapshot of Ez on y-z plane at 8.0 GHz; (c) snapshot of Hx on y-z plane at 8.0 GHz; (d) power flow on y-z plane at 8.0 GHz.
Simulation results of a finite metasurface composed of the 6-SRR super cells: (a) simulation setup: plane waves are incident on a finite-size metasurface (66 mm × 660 mm) under partial illumination at its right-most end (66 mm × 165 mm); (b) reflection of the finite metasurface under normal incidence; (c) Ez on y-z plane at 8.0 GHz; (d) power flow on y-z plane at 8.0 GHz.
The fabricated metasurface sample and measured reflection spectrum: (a) the metasurface sample; (b) measured reflection versus frequency under normal incidence.
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