A Body-Wide RF Energy Harvester Based on Textile Surface Plasmonic Antenna Array for Wearable Wireless Power Transmission

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Abstract
This brief demonstrated a body-wide RF energy harvester based on textile spoof surface plasmon (SSP) antenna array for wearable wireless power transmission. This harvester includes four patch antennas and SSP waveguides to form an SSP antenna array integrated with clothing to harvest the incident RF energy. Then, a loop and rectifier are integrated and fabricated in the same plane to extract, combine, rectify and output DC power from the multi-path harvested energy in a contactless way and without a complex matching network. They are fabricated with a simple structure, entirely off-the-shelf flexible and textile materials, and a proven fabrication technique. Finally, it is worn on the body to output DC power of $108.89~\mu \text{W}$ when illuminated with a power density of $7.96~\mu \text{W}$ /cm2 at 2.4-2.45 GHz Industrial Scientific Medical (ISM) band. This design could be applied to power the potential wearable sensors wirelessly.
Funding Information
  • National Research Foundation Singapore (NRFS2017-07)
  • National Natural Science Foundation of China (62001161)

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