Post on 24-Aug-2020
Passive Backscatter Sensors for IoTapplications
Nuno Borges Carvalho
Ricardo Correia
Daniel Belo
Felisberto Pereira
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
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Present Io“Things” Near future Io“Things”
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
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IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation
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from
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IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation Energy waste in IoT
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http://edna.iea-4e.org Source: 2016 data
Standby Energy
Battery Manufacturing
One battery per IoT device and replaced every 2nd year
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Motivation Energy waste in IoT
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Standby Energy
Batteries take hundreds of years to decompose, posing a serious threat to the public health and
to the environment.
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Market Solutions Power Consumption
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Type AAA CR2032 CR123A CR2
Material Alkaline LiMn02* Lithium Lithium
Voltage 3V 3V 3V 3V
Capacity 500 mAh 225 mAh 1500 mAh 800 mAh
0
10
20
30
40
50
60
0 50 100 150 200 250 300 350
Yea
rs
Transactions per day
AAA CR2032 CR123A CR2
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Energy harvesting sources
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Wi-Fi
Radio and TV broadcast
GSM/Cellular
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
The Solution
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Backscatter
communications
Wireless Power
Transmission
Energy
Harvesting
LoRa – 60 mW to 400 mW Bluetooth – 5 mW to 90 mW WiFi – 50 mW to 1 W
• Remove the need of power for transmit / receive!
• Eliminate batteries!
Passive
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
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Backscatter
communications
Wireless Power
Transmission
Energy
Harvesting
SWIPTSimultaneous Wireless Information and Power Transfer
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Our Solution – SWIPT backscatter
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Low Cost SDR Readers
Dummy Wireless Power Transmitters
Passive Sensors
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Backscatter Battery-less Paradigm
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IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
Towards the FUTURE!!
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Passive Sensors Increase Data rate
Increase data rate and
enable WPT capabilities
2015 2017 2018 20192016
Increase frequency and
decrease size
Total size = 0.92 mm2
kbit/s Gbit/s
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
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Backscatter ambient backscatter
Spyridon N Daskalakis et all, “Spectrally Efficient 4-PAM Ambient FM Backscattering for Wireless
Sensing and RFID Applications”, to be presents in the next IMS2018 in Philadelphia
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
mmWave low power connectivity – Applications & Investors
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• Glaucoma
• Diabetes (track the blood
sugar levels – measure
glucose)
Extremely small, low power and cheap connectivity solution which can be embedded in every object
IT- DETI – Universidade de Aveiro (nbcarvalho@ua.pt)
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Thank you very much for your attention