Programmable Digital-coding-feeding Metasurfaces

Metasurfaces, which could control electromagnetic (EM) waves in different characteristics by arranging the artificial micro-structures on a flat interface. In recent years, programmable metasurface is introduced to control the EM waves with multi-function. Here, we propose a programmable digital-coding-feeding metasurface (PDCF-MS) with control circuits to digitally simultaneously manipulate the incident EM waves and radiate the EM waves as an antenna. The multifunction of linearly and circularly polarized conversion, scattering manipulation, radiation and orbit angular momentum (OAM) generation has been comprehensively investigated using PDCF-MS. The presented PDCF-MS with the low profile and power-efficient advantages opens up avenues to realize more advanced multifunctional micro-devices and micro-systems.