Download - Wireless Power in RFID - AIMGlobal
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Wireless Power
in RFID
Charles Greene, Ph.D.
COO & CTO – Powercast Corporation
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Batteries die
Batteries generate waste
Wires are restrictive
Wires are expensive
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Batteries & wires limit connected device ubiquity
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Transmit. Radio Frequency (RF) source
sends power over the air to multiple devices
Receive. Receiver chip with antenna
captures power and charges each device
RF Wireless Power Explained
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Different kinds of wireless power
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The RF Around Us
Radio Frequency (RF) energy is emitted from a range of existing sources
we come into contact with every day.
• Cell phones
• Wi-Fi routers
• Bluetooth
• RFID readers
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Why a Power Transmitter?
While there are many emitters of RF energy in our lives, not all of them are
significant power sources, are predictable, or are stationary. A dedicated
transmitter provides a robust solution.
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less power more power
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Comparing Power Transmitters and RFID Readers
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Leveraging RFID in Wireless Power Systems
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Existing RFID infrastructure can
be used dually as a wireless
power delivery system
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Efficiency
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Control heating & AC systems
Monitor area lighting
Building Automation
1W of power monitors & controls much larger, more power-hungry systems
Negate equipment down time
Limit defective products
Factories
Make rechargeable batteries the
industry standard
Reduce E-waste
Consumer
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What frequencies can be used?
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RF to DC Converter Chips
• Converts radio frequency (RF) energy to direct
current (DC) power
• Can harvest power from large range of sources
• Operates from 10MHz to 6GHz
• Up to 75% RF to DC conversion efficiency
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RF Wireless Charging
vs.
RF Harvesting
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RF Wireless Charging
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• Dedicated Power Transmitter
• Recommended for mobile and
computer peripherals:▪ Headphones
▪ Game controllers
▪ Wearable Tech
▪ Keyboards and Mice
• Power over several inches to
several feet
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RF Harvesting
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• Multiple RF power source options
▪ Commercial power transmitter
▪ Fixed RFID reader
▪ Handheld RFID reader
• Range of use cases
▪ Sensor readings
▪ Bi-stable display updates
▪ Identification / Authentication
• Power to 80 ft for some use cases
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Deployments
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TAG
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By ViewTag | Launched with British Airways
• Power & data delivery at 915 MHz
• Utilizes standard airport RFID equipment
• Power harvesting technology significantly extends
battery life
ViewTag is a permanent, electronic alternative to
paper-based bag tags that utilizes airport RFID
equipment to update travelers’ information and track
their baggage.
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Sensor Tags
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• Power & data delivery at 915 MHz
• Temperature, light, & humidity readings
• Two tag styles available• Battery free – instantaneous readings
• Wirelessly rechargeable – data logging
PCT wireless sensor tags harvest energy from
standard RAIN RFID readers and are typically used
in environmentally controlled shipments and for
building automation control.
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SmartBall
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• Power & data delivery at 2.45 GHz
• Single antenna design
• Charging cradle for convenient storage
By SportCor | Launched by Kookaburra
RFID Journal’s 2020 “Best Use
of RFID to Enhance a Product or
Service”
The Kookaburra SmartBall reports revolutions,
speed, and bounce in real time and is wirelessly
rechargeable using RF wireless charging
technology.
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Wireless Charging Grip
Powercast’s Wireless Charging Grip is the
world’s first truly wirelessly rechargeable
gaming accessory. It recharges over the
air using the PowerSpot RF wireless
power transmitter.
• 915MHz operation
• 1 Watt power output from Tx
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Future Uses
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RFID Batteryless Price Tags
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• Segmented & active matrix displays
• Single antenna design
• Optimized for both fixed and handheld
readers
• Indefinite operational life
Completely battery free and utilizing bi-stable
displays, these price tags utilize installed or
handheld RAIN RFID readers to write the
screen over the air.
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Smart Cards
Integration of RF power harvesting technology
removes or reduces the need for a battery, allowing
the card to remain ultra thin while supporting
additional advanced features.
• Enable additional security features
• Fingerprint scanner
• Bi-stable displays
• Buttons / keypads
• BLE tracking
• RAIN RFID & NFC compatible
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Battery Free Temperature Scanner
In response to the COVID-19 pandemic,
this fob device utilizes energy from
existing RFID infrastructure to monitor
access via forehead temperature
readings.
• Seamlessly integrates into existing
RAIN RFID systems
• Single antenna design
• Low cost and easy to use
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Wearables
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Textile printed circuitry that is fully
waterproof, flexible, and wirelessly
powered.
• Circuitry becomes inherent part of
overall garment
• Common failure points solved
• Charging ports
• Battery size restrictions
• Opportunity for additional antennas
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Illuminated Labels
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Using PPG’s TESLIN® substrate and conductive
coatings, circuitry and antennas can be directly
printed onto labels or other packaging materials.
• Indefinite illumination or other functionality
• High volume, low-cost printing
• One label, multiple functionalities
• Product differentiation
• RFID
• Sensor readings – humidity, temperature
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Thank You.
Powercast is changing the way the world charges.
Charles Greene, Ph.D. , COO&CTO | [email protected]
+1 412.923.4770
Powercast’s IP portfolio includes 63 patents worldwide (32 in the US) and 34 patents pending.© Powercast Corporation 2020
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