Path Loss Modeling and Measurements for Reconfigurable Intelligent Surfaces in the Millimeter-Wave Frequency Band

Reconfigurable intelligent surfaces (RISs) provide an interface between the electromagnetic world of wireless propagation environments and the digital world of information science. Simple yet sufficiently accurate path loss models for RISs are an important basis for theoretical analysis and optimization of RIS-assisted wireless communication systems. In this paper, we refine our previously proposed free-space path loss model for RISs to make it simpler, more applicable, and easier to use. The impact of the antenna’s directivity of the transmitter, receiver, and the unit cells of the RIS on the path loss is explicitly formulated as an angle-dependent loss factor. The refined model gives more accurate estimates…

• EC
  European Commission

  Award: 871464
• NN
  National Natural Science Foundation of China

  Awards: 61941104, 61921004, 61731010
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20220809
• KT
  Key Technology Research and Development Program of Shandong

  Award: 2020CXGC010108
• NK
  National Key Research and Development Program of China

  Award: 2018YFA0701904