With the expanded use of millimeter-wave frequency bands in 5G/L5G systems, coverage dead zones in non-line-of-sight conditions caused by obstacles and buildings have become a significant challenge. In this seminar, we introduce a technology that utilizes metamaterial-based electromagnetic scattering sheets to appropriately scatter and redistribute radio waves, enabling signal delivery to areas that were previously difficult to reach. Furthermore, we present a flexible and efficient next-generation area design approach through the study of installation conditions and placement optimization in real-world environments.