121. a 4.5 nw wake-up radio with -69dbm sensitivity

Department: Electrical & Computer Engineering
Faculty Advisor(s): Patrick P. Mercier | Drew A. Hall | Gabriel M. Rebeiz | Young-Han Kim

Primary Student
Name: Po-Han Wang
Email: pow008@ucsd.edu
Phone: 858-405-3981
Grad Year: 2018

Student Collaborators
Haowei Jiang, haj019@eng.ucsd.edu

Abstract
Wake-up receivers (WuRXs) are low-power radios that continuously monitor the RF environment to wake up a higher power radio upon detection of a pre-determined RF signature. Prior-art WuRXs have 100s of kHz of bandwidth with low signature-to-wake-up-signal latency to help synchronize communication amongst nominally asynchronous wireless devices. However, applications such as unattended ground sensors and smart home appliances wake-up infrequently in an event-driven manner, and thus WuRX bandwidth and latency are less critical; instead, the most important metrics are power consumption and sensitivity. Unfortunately, current state-of-the-art WuRXs utilizing direct envelope-detecting and IF/uncertain-IF architectures achieve only modest sensitivity at low-power. Here we present a 0.4V 113.5 MHz OOK-modulated WuRX that achieves -69dBm sensitivity with only 4.5nW of power to meet the needs of next-generation event-driven sensing networks.

Industry Application Area(s)
Aerospace, Defense, Security | Electronics/Photonics | Semiconductor

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