Journal
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume 66, Issue 1, Pages 366-379Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMTT.2017.2721399
Keywords
Broadband antennas; conformal antennas; copper adhesive laminate; energy harvesting; flexible electronics; Internet of Everything; Internet of Things (IoT); multiband rectifier; rectennas; slot antennas
Categories
Funding
- DTRA
- NSF
- SRC
- Texas Instruments Incorporated
- European Union [654734]
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This paper introduces a novel compact ultra-lightweight multiband RF energy harvester fabricated on a paper substrate. The proposed rectenna is designed to operate in all recently released LTE bands (range 0.79-0.96 GHz; 1.71-2.17 GHz; and 2.5-2.69 GHz). High compactness and ease of integration between antenna and rectifier are achieved by using a topology of nested annular slots. The proposed rectifier features an RF-to-dc conversion efficiency in the range of 5%-16% for an available input power of -20 dBm in all bands of interest, which increases up to 11%-30% at -15 dBm. The rectenna has been finally tested both in laboratory and in realistic scenarios featuring a superior performance to other state-of-the-art RF harvesters on flexible substrates.
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