Abstract:<p>Most existing path loss models for radio links enabled by reconfigurable intelligence surfaces (RISs) have been derived by assuming that each unit cell of these surfaces scatters incident waves individually. However, unit cells are mutually coupled and scatter collectively, as expressed by the complex radar cross-section (CRCS) of the surface. The CRCS can be computed by full-wave analysis, but this analysis has to be repeated for each of the many states of the RIS, requiring excessive resources. We p… Show more
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