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Wireless energy harvesting using serially connected voltage doublers

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7 Author(s)
Zhang Jun Wu ; Div. of Circuit & Syst., Nanyang Technol. Univ., Singapore, Singapore ; Wang Lin Biao ; See Kye Yak ; Tan Cher Ming
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A major obstacle of wireless energy harvesting is to convert relatively low power wireless RF energy into sufficiently high DC voltage for practical use. This paper explores and studies a topology where several voltage doublers are connected in series to boost up the DC output voltage from the wireless energy harvesting circuits. A prototype has been designed and fabricated to test the feasibility of the proposed topology. With five voltage doublers in series, a resultant DC voltage of as high as 1.23 V can be obtained when an omni-directional antenna is transmitted at a power level of 20 dBm from a distance 3 m away from the prototype.

Published in:

Microwave Conference Proceedings (APMC), 2010 Asia-Pacific

Date of Conference:

7-10 Dec. 2010