7799e995042c27d72f62222b2c899ba8 electronics_a2021v10n10p1196.pdf 46e12289f74ec065ff14528b97150766cf8c24e4 electronics_a2021v10n10p1196.pdf 1176a0d86839284cbf3031bfe7a55ff57397b62062b75b11b15754851a983976 electronics_a2021v10n10p1196.pdf Title: Metamaterial Impedance Matching Network for Ambient RF-Energy Harvesting Operating at 2.4 GHz and 5 GHz Subject: This paper points out the viability of the utilization of metamaterial transmission lines as a multifrequency impedance matching network, improving RF-Energy Harvesting systems operating around 2.4 GHz and 5 GHz. Metamaterial transmission lines introduce additional degrees of freedom in the transmission line design, providing the possibility to match the impedance in multiple bands. The impedance matching structure has been designed and optimized using ADS simulator to match the input impedance of a four-diode-bridge rectifier connected to an energy management system. The proposed Metamaterial Impedance Matching Network (MIMN) has been fabricated using standard PCB technologies and tested in a full operative ambient RF-Energy Harvesting System obtaining a DC output voltage of 1.8 V in a 6.8 mF supercapacitor. Keywords: energy management system; impedance matching network; metamaterials; ambient RF-Energy Harvesting; Wi-Fi bands Author: Ertugrul Coskuner and Joan J. 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