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Wireless Communications Through Reconfigurable Intelligent Surfaces

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Academic year: 2021

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Figure

FIGURE 1. Two-ray propagation model with a LOS ray and a ground-reflected ray.
FIGURE 2. Conceptual illustration of an RIS made of 20 reconfigurable meta-surfaces whose phases ( 8 i ) can be tuned independently and whose reflected rays are steered toward the same reflection angle
FIGURE 3. The structure of an RIS (intelligent wall) that is made of an active frequency-selective surface.
FIGURE 5. Reflection from an RIS in a dual-hop communication scenario without a line-of-sight path between S and D.
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