Reconfigurable Refractive Surfaces: An Energy-Efficient Way to Holographic MIMO

Holographic Multiple Input Output (HMIMO), which integrates massive antenna elements into a compact space to achieve spatially continuous aperture, plays an important role in future wireless networks. With numerous elements, it is hard implement the HMIMO via phased arrays due unacceptable power consumption. To address this issue, reconfigurable refractive surface (RRS) energy-efficient enabler of since free expensive phase shifters. Unlike traditional metasurfaces working as passive relays, RRS used transmit antennas, where far-field approximation does not hold anymore, urging new performance analysis framework. In letter, we first derive data rate RRS-based single-user downlink system, and then compare its consumption with array. Simulation results verify our show that way HMIMO.