Electronically tunable switch-mode high-efficiency adaptive band-pass filters for energy harvesting applications
Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessRestricted access - publisher's policy
Wireless Sensor Networks (WSN) present a pending challenge for a complete deployability due to energy requirements. The Self-Powered WSN approach aims to extend the sensor node life by means of Energy Harvesting. The harvested energy presents an erratic behavior in both time and frequency. In this paper, a new concept of switch-mode electronically tunable band-pass filters is presented to adaptively follow the power source variations and to maximize the power transfer. To implement these switch-mode filters, three alternatives are presented. These filter topologies are modeled and evaluated. Additionally, some design guidelines are provided. The results show how these high efficiency topologies present a band-pass behavior whose center frequency can be electronically tuned over one decade. The results target the integration of these high-efficiency switch-mode band-pass filters into the future harvesting front-ends.
CitationGomez, R., Martinez, H., Poveda, A., Alarcon, E. Electronically tunable switch-mode high-efficiency adaptive band-pass filters for energy harvesting applications. A: IEEE International Symposium on Circuits and Systems. "Proceedings of the 2012 IEEE International Symposium on Circuits and Systems (ISCAS)". Institute of Electrical and Electronics Engineers (IEEE), 2012, p. 684-687.
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