We send messages even when your phone falls battery – Virtual Poland

 Backscatter Wireless Devices is a new category of extremely energy-efficient communication. To work does not need more power, you do not need a battery during the announcement – bounce the signal from other sources.

 
 The principle of operation is similar to backscatterów labels (RFID. Radio-frequency identification ). Passive RFID tags do not have their own power – when they are in the electromagnetic field of the resonant frequency of the receiver, collect the received energy in the capacitor contained in the structure of the tag. After receiving enough energy, you reply containing the code tag.

 
 In the case of backscatterów engineers at UCLA and NASA have gone much further. In addition to collecting small amounts of energy, these devices also reflect the network signal, converting it in your own message. In testing, the signal enough TV transmitter, located at a distance of 10.5 km from the unit.

 One of the recent achievements of engineers from UCLA to obtain transmission rate of about 3 Mb / s in the range of 2.5 m. With so much at communicating small signal reflector, which reflected signal Wi-Fi network nearby, replacing it with your own message. According to the researchers, the more advanced signal processing, transmission distance of 20 m will be possible with typical Wi-Fi speeds of 50 Mb / s. And all of this energy consumption at 0.01% today network solutions.

 
 Backscattery a great opportunity for further development of devices that will carry on itself (called. Wearable Devices ). Instead of constantly having to irritate connect them to power, they may prove to be an additional communication platform, which will continue to be useful even when you have all the batteries will fall. It’s also a chance for fast communication between the devices of 10 000 times less energy than before. Backscattery may also be used in the so. Smart homes – once embedded in the wall, will function for years, will be useful also for more mundane sentences like. informed to leave the keys.