The development team from Washington has modified LPWAN technology, increasing the energy efficiency of long distance wireless communications. They demonstrated their project at UbiComp 2017, reports the University of Washington site.
Scientists suggested using radio waves backscattering to receive and transmit data from passive sensors, which use 1000 times less electricity when operating than the devices used today. According to the project, the radio waves that the source radiates change when reaching the sensor, then they are reflected and sent to the receiver. The radiation source and the receiver can be at a distance of up to half a kilometer.
Prototypes have already passed the tests in different conditions. Energy consumption during the field tests reached a 9 microwatt rate, which is three times less than that of modern analogues. The plan is to launch full scale production in the coming months.
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