A Novel Six-Band Dual CP Rectenna Using Improved Impedance Matching Technique for Ambient RF Energy Harvesting

Chaoyun Song, Yi Huang, Paul Carter, Jiafeng Zhou, Sheng Yuan, Qian Xu, Muayad Kod

Research output: Contribution to journalArticle

118 Citations (Scopus)

Abstract

A novel six-band dual circular polarization (CP) rectenna for ambient radio frequency (RF) energy harvesting is presented. Due to the nonlinearity and complex input impedance of the rectifying circuit, the design of a multiband and/or broadband rectenna is always challenging and its performance can be easily affected by variation in the input power level and load. Therefore, an improved impedance matching technique is introduced, which is aimed to improve the performance of the rectifier with a varying condition. A broadband dual CP receiving antenna is proposed, which has a very wide bandwidth (from 550 to 2.5 GHz) and a compact size. An annular ring structure and a novel feeding technique are employed in order to reduce the size and improve the antenna performance. As a result, the proposed rectenna is the first design that covers six frequency bands, including part of the digital TV and most cellular mobile and WLAN bands in the U.K., while the optimal load range for a constant conversion efficiency is from 10 to 75 kΩ. The measured results show that the maximum harvested dc power of the rectenna in typical outdoor and indoor environments are 26 and 8 μW, respectively; it can therefore be applied to a range of low-power wireless applications.
Original languageEnglish
Pages (from-to)3160-3171
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume64
Issue number7
Early online date10 May 2016
DOIs
Publication statusPublished - Jul 2016

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