Scientists Find New Use For Home WiFi That Could Save You Money


wifi power

Led by Raghav Sharma, from the Department of Electrical and Computer Engineering at the National University of Singapore, a team of researchers developed a “sensitive spin rectifier rectenna” that has the ability to harvest ambient radiofrequency signals between −62 and −20 decibel-milliwatts (dBm), which is equal to less than 0.00001 watts.

While the wattage may seem like nothing more than a rounding error, the newly designed spin rectifiers can be used to wirelessly power a sensor at a radiofrequency power of −27 dBm. According to the team of researchers, this ability to harvest ambient radiofrequency signals can eventually be scaled up to power larger devices by harvesting WiFi power.



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