Reconfigurable intelligent surface (RIS) or Large Intelligent Surface (LIS) creating an intelligent electromagnetic environment for wireless communications

Reconfigurable intelligent surface (RIS)—known also as intelligent reflecting surface (IRS), and large intelligent surface (LIS)—is a programmable structure that can be used to control the propagation of electromagnetic (EM) waves by changing the electric and magnetic properties of the surface. These elements form a low-profile 2D reflecting or transmission array, which is able to manipulate…