Multitarget Simultaneous Wireless Information and Power Transfer (SWIPT) Scheme Based on Anisotropy-Metasurface Field Synthesis

Abstract

In order to solve the key problems of wireless communication and wireless power supply of the current growing number of wireless devices in the 5G/6G era, a multitarget simultaneous wireless information and power transfer (SWIPT) scheme based on anisotropy-metasurface field (AMF) synthesis is proposed and analyzed. By designing an anisotropic-metasurface unit and proposing a field synthesis algorithm, metasurfaces are capable of independently modulating double linear-polarization waves can be designed. The metasurface radiates dual-polarization multifocal beams and carries wireless power with x-polarization waves and information with y-polarization waves, which enables the cooperative transmission of information and power to multiple targets while retaining easy separation. For various multitarget SWIPT scenarios, a single-feed and multiple-focus (SFMF) metasurface and a dual-feed and multiple-focus (DFMF) metasurface are designed to radiate dual-polarization multifocal beams both with a total transfer efficiency of over 40%. Besides, a dual-polarization and dual-port receiving array antenna is designed for harvesting power and information in SWIPT systems. Based on polarization diversity (PD), this work provides a simple and feasible idea for the design of multitarget SWIPT systems.