volume | PIER Journals

Abstract

In this paper, an integrated rectifying metasurface harvester with small dimensions, wide-angle incidence, and polarization insensitive characteristics is proposed. The proposed structure is assembled from a periodic unit cell, diodes, and loads, which makes the structure simple and less expensive to manufacture. The centrosymmetric design concept of the unit cell structure enables the proposed metasurface harvester to capture incident waves with arbitrary polarization angles and over a wide incident angle range of 60°. A 5 x 5 metasurface array was fabricated for real measurements. The results show that the measured efficiency is 62.07% near the operating band 5.8 GHz when the incident power is 15 dBm. When the polarization angle of the incident wave is changed, the efficiency remains essentially constant. As the angle of incidence changes, the efficiency shows a certain decrease, but it can still maintain an efficiency close to 50% near the operating frequency band. The proposed harvester can supply energy to low power devices as well as sensor nodes in IoT.

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Dr. Congcong Xia

Professor Hongmei Zhao

Dr. Yunfei Wang

Dr. Mingxing Ren