Toward Nonlocal Programmable Metasurfaces for Multiuser Orthogonal Beamforming
A circuit-based metasurface is proposed for multiuser orthogonal beamforming and multiple-input-multiple-output (MIMO) wireless communications. The metasurface consists of several pairs of propagation and phased shifter layers, stacked several times to form an electrically thin structure that provides the necessary non...