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Dual-band ambient energy harvesting systems based on metamaterials for self-powered indoorwireless sensor nodes

机译:Dual-band ambient energy harvesting systems based on metamaterials for self-powered indoorwireless sensor nodes

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摘要

In this study, we present a comprehensive dual-band ambient radio-frequency (RF) energyharvesting system, consisting of rectenna and power management circuit, to harvest energyfrom 2.45 and 5.8 GHz Wi-Fi. The rectenna employs a metamaterial antenna based on asplit-ring resonator, which possesses omni-directional radiation pattern at both frequenciesand compact size (0.18λ × 0.25λ at 2.45 GHz). The dual-band rectifier yields the highest efficiencyof 42 at 2.45 GHz and 1 dBm input power, 30 at 5.8 GHz and ? 7 dBm inputpower. 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 aboost converter, is integrated to produce a stable, sufficient output voltage. The energy harvestingsystem, with its comprehensiveness, is suitable for supplying low-power wireless sensornodes for indoor applications.

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