A team of engineers from University of Washington
Seattle, the USA, has presented a research paper
titled ‘Powering the Next Billion Devices with Wi-Fi’ that
Bionic leg that can be controlled by
thoughts (Image courtesy: Ossur)
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18 July 2015 | Electronics For You www.efymag.com
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discusses how a Wi-Fi router can be used to provide farfield
wireless power for gadgets. In their first prototype,
for the first time in the world, they have demonstrated
how Wi-Fi chipsets can power camera sensors or li-ion
coin-cell batteries from more than 6m (20-feet) away.
Wi-Fi receivers had so far been used to capture information
from Wi-Fi radio broadcasts. The research team has
sought a way to harvest energy from these broadcasts.
The engineers connected an antenna to a temperature
sensor and put it near a Wi-Fi router so that voltages
in the device could be measured to determine the time
for which the device could operate on a remote power
source. To make things work, they programmed these
devices for broadcasting continuous power to an energyharvesting
sensor. The results showed that a temperature
sensor could operate at a distance of up to six metres.
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