A Triple-Band CP Rectenna for Ambient RF Energy Harvesting

Guiping JIN  Guangde ZENG  Long LI  Wei WANG  Yuehui CUI  

IEICE TRANSACTIONS on Communications   Vol.E103-B   No.7   pp.759-766
Publication Date: 2020/07/01
Publicized: 2020/01/10
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3185
Type of Manuscript: PAPER
Category: Antennas and Propagation
RF energy harvesting,  receiving antenna,  rectifying circuit,  low power density,  

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A triple-band CP rectenna for ambient RF energy harvesting is presented in this paper. A simple broadband CP slot antenna has been proposed with the bandwidth of 51.1% operating from 1.53 to 2.58GHz, which can cover GSM-1800, UMTS-2100 and 2.45GHz WLAN bands. Accordingly, a triple-band rectifying circuit is designed to convert RF energy in the above bands, with the maximum RF-DC conversion efficiency of 42.5% at a relatively low input power of -5dBm. Additionally, the rectenna achieves the maximum conversion efficiency of 12.7% in the laboratory measurements. The measured results show a good performance in the laboratory measurements.