2020•Unpublished venueRequires access

Investigation of Rectenna's Bandwidth for RF Energy Harvesting

Rui Ren, Jie Huang, Hucheng Sun

Abstract

This paper presents an enhanced rectenna with harmonic rejection for RF energy harvesting applications. Based on a wideband log-periodic antenna, the high-order harmonics at 4.9 GHz, 7.35 GHz, and 9.8 GHz can be suppressed by optimizing the sizes of the antenna's branches. A rectenna with harmonic rejection can be formed by combining this antenna with a 2.45-GHz rectifier. The RF-to-DC power conversion efficiency of this rectenna is measured and compared with a second rectenna without harmonic rejection capability. The comparison shows that the designed rectenna's efficiency is enhanced, and hence it is advantageous when used for the RF energy harvesting application.

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Available abstract

Key concepts: Rectenna, Energy harvesting, Energy conversion efficiency, Radio frequency, Rectifier (neural networks), Harmonics, Bandwidth (computing), Electrical engineering