RF Energy Harvester-based Wake-up Receiver

Kaushik, K and Mishra, D and De, S and Seo, J-B and Jana, Soumya and Chowdhury, K and Basagni, S and Heinzelman, W (2015) RF Energy Harvester-based Wake-up Receiver. IEEE Sensors . IEEE, Busan, SOUTH AFRICA, pp. 1499-1502. ISBN 978-1-4799-8203-5

Preview

Text
KaushikMDSJCBH15.pdf - Accepted Version
Download (518kB) | Preview

Abstract

Wake-up receivers (WuRxs) can improve the life- time of a wireless sensor network by reducing energy consump- tion from undesirable idle listening. The amplitude level of the incoming RF signal is used by a WuRx to generate an interrupt and wake up the radio of a sleeping sensor node. Existing passive WuRx designs are generally based on RFID tags that incur high cost and complexity. Thus, there is a need for cost-effective and low-complexity WuRxs suited for both long-range and directed wake-ups. In this work, we present a WuRx design using an RF energy harvesting circuit (RFHC). Experimental results show that our RFHC-based WuRx can provide a wake-up range sensitivity around 4 cm/mW at low transmit RF powers ( < 20 mW), which scales to a long wake-up range at high powers. Our design also obtains accurate selective wake-ups. We finally present simulation-based studies for optimizing the design of RFHCs that enhance decoding efficiency with improved rise and fall times.

[error in script]

IITH Creators: