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Appl. Sci. 2018, 8(4), 497; doi:10.3390/app8040497

Electromagnetic Power Harvester Using Wide-Angle and Polarization-Insensitive Metasurfaces

Key Laboratory of High Speed Circuit Design and EMC of Ministry of Education, School of Electronic Engineering, Xidian University, Xi’an 710071, China
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Received: 16 February 2018 / Revised: 21 March 2018 / Accepted: 22 March 2018 / Published: 26 March 2018
(This article belongs to the Special Issue Metasurfaces: Physics and Applications)
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Abstract

A new wide-angle and polarization-insensitive metasurface (MS) instead of traditional antenna is built as the primary ambient energy harvester in this paper. The MS is a two-dimensional energy harvesting array that is composed of subwavelength electrical small ring resonator that is working at 2.5 GHz (LTE/WiFi). In the case of different polarization and incidence angles, we demonstrate the metasurface can achieve high harvesting efficiency of 90%. The fabricated prototype of 9 × 9 MS energy harvesting array is measured, and the experimental results validate that the proposed MS has a good performance more than 80% of energy harvesting efficiency for arbitrary polarization and wide-angle incident waves. The good agreement of the simulation with the experiment results verifies the practicability and effectiveness of the proposed MS structure, which will provide a new source of supply in wireless sensor networks (WSN). View Full-Text
Keywords: metasurface (MS); energy harvesting; wide-angle; polarization-insensitive metasurface (MS); energy harvesting; wide-angle; polarization-insensitive
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Zhang, X.; Liu, H.; Li, L. Electromagnetic Power Harvester Using Wide-Angle and Polarization-Insensitive Metasurfaces. Appl. Sci. 2018, 8, 497.

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