UNIVERSITY OF WASHINGTON
Using ambient backscatter, these devices can interact with users and communicate with each other without using batteries. They exchange information by reflecting or absorbing pre-existing radio signals.
Using ambient backscatter, these devices can interact with users and communicate with each other without using batteries. They exchange information by reflecting or absorbing pre-existing radio signals.
Engineers at the University of Washington have managed to create several such devices, allowing users to interact or communicate with each other battery-free by repurposing existing radio signals.
It’s called ambient backscatter, a technique whereby a device appropriates wireless signals already bouncing around in the atmosphere and uses them both as a power source and a way to communicate with other devices. Ambient backscattering has similarities to RFID, but differs in that it doesn’t require a high-power signal source, has a relatively small footprint and can communicate device-to-device — unlike RFID, where tags have no ability to detect each others’ existence.
It’s called ambient backscatter, a technique whereby a device appropriates wireless signals already bouncing around in the atmosphere and uses them both as a power source and a way to communicate with other devices. Ambient backscattering has similarities to RFID, but differs in that it doesn’t require a high-power signal source, has a relatively small footprint and can communicate device-to-device — unlike RFID, where tags have no ability to detect each others’ existence.
You can read more Click official engineering paper
via Techland
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