Prototype implementation of wireless sensor network using TV broadcast RF energy harvesting

Authors:
Hiroshi Nishimoto;Yoshihiro Kawahara;Tohru Asami
Affiliations:
The University of Tokyo, Tokyo, Japan;The University of Tokyo, Tokyo, Japan;The University of Tokyo, Tokyo, Japan
Venue:
Proceedings of the 12th ACM international conference adjunct papers on Ubiquitous computing - Adjunct
Year:
2010

Citing 2
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Abstract

Energy harvesting is a key technique that can be used to overcome the barriers that prevent the real world deployment of wireless sensor networks. We explored the use of airwaves of TV broadcasts as energy sources to power wireless sensor nodes. We measured the output of a rectenna continuously for 7 days. The experimental results showed that the daily and weekly cycles of TV broadcasts affected the harvested energy output. We developed a Radio Frequency (RF) energy harvesting wireless sensor network prototype to show the effectiveness of RF energy harvesting for the usage of a wireless sensor network. We also proposed a duty cycle determination method for our system, and verified this by implementation.