A Review of Rectifier Designs for RF Energy Harvesting System

Said, M. A. Meor; Zakaria, Z.; Husain, M. N.; Yunus, M. M.; Abu, M.; Misran, M. H.
July 2014
Australian Journal of Basic & Applied Sciences;Jul2014, Vol. 8 Issue 10, p180
Academic Journal
Energy harvesting is a rapidly growing area in many scientific and engineering related fields due to the need for finding solutions to the world's power issues. This paper focuses on matching and rectifying circuit in order to obtain the optimum parameters for the overall energy harvesting system. In this case, the use of rectifier which is integrated with matching circuit is crucial for the efficient RF-to-DC power conversion. Due to limitation of the stub matching circuits with a single stage rectifier that produce low efficiency of around 18% - 37%, multi-stages rectifiers are developed to produce higher efficiency for the RF-to-DC power conversion. However, this will add complexity to the circuit and require more power to activate the diodes at each stage. The purpose of this paper is to concise overview of existing matching and rectifying circuits that can give advantage for researcher in the field of electromagnetic energy scavenging. This conclude with the performance characterization of a single and double stage rectifiers.


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