Broadband Wide-Angle Polarization-Independent Rectifying Metasurface for Wireless Power Transfer and Energy Harvesting : (Invited talk)

Energy is the promoter of human civilization. Before Marconi successfully transmitted radio telegraph over the Atlantic, Tesla proposed transferring power by electromagnetic (EM) wave wirelessly. Over 120 years passed, we are now getting closer to wireless power transmission (WPT) technology. In most applications, such as point to multi-point, multi-point to point, and long distance, it is a hard work to align the polarization and incident directions between the transmitter and receiver. On the other hand, our environment is filled with EM waves on different operation bands with the rapid development of various wireless communication technologies. Recycling these EM power is significant for ever-lasting development of human society. Thus, the EM energy receiver is required to has the characteristics of broadband, polarization insensitive and wide incident angle. Metasurface, composed of periodically arranged subwavelength elements, shows outstanding characteristics in WPT and energy harvesting, such as compactness, insensitive polarization operation and wide incident angle. Integrated with rectifier diodes, the metasurface could be an excellent candidate to meet demand for WPT and energy harvesting [2] – [3] .