Considerations for the Design and Implementation of Ambient RF Signal Rectifiers in the 2.45 GHz WiFi Band
García García, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Data:	2022
Resum:	Ambient RF energy harvesting (RF-EH) is a particular case of wireless power transfer (WPT), which is characterized by ultra-low power operation. This work points out theoretical and practical aspects that should be considered in the design of RF rectifiers for ambient RF energy harvesting systems. The most common RF rectifier circuits are compared and discussed using simulations and experimental data. The efficiency is analyzed in terms of the input power and load resistance. It is demonstrated that the most efficient RF rectifier in ultra-low power conditions is the simple diode capacitor structure. As an illustrative example, an RF rectifier has been fabricated by designing an impedance-matching network to operate into the WIFI band. The fabricated prototype shows a measured 12% efficiency working at 2. 47 GHz with around -30 dBm ambient input power, which is higher than the reported efficiencies in the literature. The fabricated energy harvesting system delivers power between 25. 6 nW and 129. 6 nW to a resistive (Formula presented. ) load. The obtained results are applicable to ambient RF up to 6 GHz.
Nota:	This research has been founded by the Grupo de Aplicaciones Electro-Magnéticas Industriales (GAEMI) of the Departament d'Enginyeria Electrònica of the Universitat Autònoma de Barcelona.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Applied sciences (Basel), Vol. 12, Núm. 15 (August 2022) , art. 7884, ISSN 2076-3417

DOI: 10.3390/app12157884

11 p, 3.6 MB

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