Efficient Compact Single-Layer Metasurface RF Energy Harvesters for IoT Applications
Authors:
Raziyeh Sharifi, Anne Claire Lepage, Kyriaki Niotaki, Xavier Begaud
Abstract:
In this paper, we extend our previous works on compact and efficient metasurface energy harvesters by
introducing additional theoretical analysis and measurement results for evaluating performance in finite
arrays. Two metasurface harvesters are studied: a single-band design operating at 2.45 GHz and a dual-band
design covering 2.45 GHz and 5.2 GHz (Wi-Fi bands), proposed for IoT applications. This paper introduces the
concept of central rows in the finite array, which provides a more realistic and reliable metric for
characterizing the capturing efficiency. For both designs, 5×4 finite arrays are analyzed. The simulated
capturing efficiency of the central rows reaches 90% at 2.54 GHz for the single-band structure, and 74% at
2.5 GHz and 30% at 5.09 GHz for the dual-band design. Each proposed design has been analyzed independently,
fabricated, and measured to verify its performance.
