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Appl. Sci. 2018, 8(4), 497;

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
Authors to whom correspondence should be addressed.
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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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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