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Title: A dual-band efficient circularly polarized rectenna for RF energy harvesting systems
Authors: Ang, Ming Jie
Nasimuddin, N.
Muhammad Faeyz Karim
Chandrasekaran, Karthik T.
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2019
Source: Ang, M. J., Nasimuddin, N., Muhammad Faeyz Karim & Chandrasekaran, K. T. (2019). A dual-band efficient circularly polarized rectenna for RF energy harvesting systems. International Journal of RF and Microwave Computer-Aided Engineering, 29(1).
Journal: International Journal of RF and Microwave Computer-Aided Engineering
Abstract: A multilayered circularly polarized (CP), dual-band, stacked slit-/slotted-patch antenna with compact size and with compact rectifier is offered for RF energy harvesting systems. The compact dual-band CP antenna size is able to achieve by stacking slotted-circular-patch (SCP) on the substrate above the tapered-slit-octagon patch (TSOP). Dual-band CP radiation is realized by stacking the SCP on the TSOP and the microstrip feedline with metallic-via to SCP. Eight-tapered-slit with length difference of 6.25% are embedded along the octagonal directions symmetrically on the TSOP from the patch's center and two unequal size circular slots are embedded in diagonal axis onto SCP to produce dual-orthogonal modes with almost equal magnitude for CP waves. The designed antenna is realized measured gain of greater than 5.2 dBic across the band (0.908-0.922 GHz) with maximum gain of 5.41 dBic at 0.918 GHz and gain of greater than 6.14 dBic across the band (2.35-2.50 GHz) with maximum gain of 7.94 dBic at 2.485 GHz. An overall antenna volume is 0.36λ ₀ × 0.36λ ₀ × 0.026λ ₀ (λ ₀ is free space wavelength at 0.9 GHz). A compact composite right-/left-handed (CRLH) based rectifier with dual-band at 0.9 and 2.45 GHz is designed, prototyped, and measured. The right-handed (RH) part of the CRLH transmission line (TL) is formed by a microstrip line. The left-handed (LH) part of the CRLH-TL is formed by lumped components. The measured RF-DC conversion efficiency is 43% at 0.9 GHz and 39% at 2.45 GHz with rectifier size of 0.18λ ₀ × 0.075λ ₀ × 0.0002λ ₀ at 0.9 GHz.
ISSN: 1096-4290
DOI: 10.1002/mmce.21665
Rights: © 2018 Wiley Periodicals, Inc. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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