One-bit Programmable Metasurface for Enhanced Wireless MIMO Systems

摘要

A 1-bit programmable metasurface is proposed for enhanced wireless MIMO systems under normally incident plane waves. Theoretical analysis is presented to demonstrate that, single-beam patterns in an arbitrary direction can be achieved by randomly introducing two pre-phases in one-bit unit cells with two phase states. As an demonstration, an pair of one-bit programmable unit cells with 180-degree phase difference between two states is designed, from 4.5 GHz to 5.5 GHz. The two randomly distributed pre-phases are introduced by placing the unit cell on the two different layers of the substrates. Four one-bit programmable metasurfaces with different beam direction are designed and simulated over the bandwidth of 4.5 GHz to 5.5 GHz. Simulated results confirm that the proposed one-bit programmable metasurface can achieve single-beam pattern in an arbitrary direction under normally incident plane waves.