Figure 1.


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(a) Equivalent refractive index, nf, for a fishnet metamaterial made of four plates. Vertical and horizontal black dashed lines correspond to the working frequency f0 = 99 GHz and hole diameter a = 0.54 respectively. Parameter definition of fishnet metamaterial unit cell (Inset); (b) Transmission coefficient S21 for a four-plate fishnet metamaterial; (c) Fabricated WZP fishnet metamaterial lens and its seven Fresnel zones.

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