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Dual-band ambient energy harvesting systems based on metamaterials for self-powered indoorwireless sensor nodes
International Journal of Microwave and Wireless Technologies Số 10, năm 2022 (Tập 14, trang 1270-1278)
ISSN: 17590787
ISSN: 17590787
DOI: 10.1017/S1759078721001641
Tài liệu thuộc danh mục:
Article
English
Từ khóa: DC-DC converters; Directional patterns (antenna); Electric rectifiers; Energy harvesting; Metamaterial antennas; Metamaterials; Microwave antennas; Omnidirectional antennas; Power management; Radiation efficiency; Rectennas; Ambient radio-frequency energy harvesting; Ambients; Dual Band; Dual band antennas; Indoor wireless sensor node; Radio Frequency Energy Harvesting; Self-powered; Self-powered wireless sensor node; Wireless sensor node; Sensor nodes
Tóm tắt tiếng anh
In this study, we present a comprehensive dual-band ambient radio-frequency (RF) energy harvesting system, consisting of rectenna and power management circuit, to harvest energy from 2.45 and 5.8 GHz Wi-Fi. The rectenna employs a metamaterial antenna based on a split-ring resonator, which possesses omni-directional radiation pattern at both frequencies and compact size (0.18λ × 0.25λ at 2.45 GHz). The dual-band rectifier yields the highest efficiency of 42% at 2.45 GHz and 1 dBm input power, 30% at 5.8 GHz and-7 dBm input power. The maximum RF-DC efficiency for each band is 72% at-5 dBm and 27% at-2 dBm, respectively. The power management circuit, consisting of a storing capacitor and a boost converter, is integrated to produce a stable, sufficient output voltage. The energy harvesting system, with its comprehensiveness, is suitable for supplying low-power wireless sensor nodes for indoor applications. © 2021 The Author(s). Published by Cambridge University Press in association with the European Microwave Association.
