The new development can transmit data without any radiation
A group of researchers from the University of Washington has developed a new way to communicate over short distances with devices that do not require batteries or transmit any signals. They say the development of pairs of devices that can successfully communicate at speeds up to 10 kbit / s at a distance of 1 meter. Such solutions can be claimed in the so-called wearable electronics, or in a variety of sensor systems. unusual secret communications lies in the body-such a method of data transmission, the frequency of which corresponds to a television frequencies in most cities of the world.
The signals are best transmitted through the air, but the presence of any obstacles, such as a tree, immediately reduces the transmission quality. In addition, the new product does not yet have data protection, so you can catch the transmitted data by means of a television antenna. Researchers say that the advantage of the effect of the reflection. A pair of devices may interact with each other, reflecting or absorbing TV signals. Both devices are configured to operate on TV channels 22-29 range UHF, where the signals are used in two ways, says Joshua Smith, co-development. Firstly, the first 10-20 microwatts obtained from wave signals, which are transmitted to charge the capacitor miniature working like a miniature simple scheme. Secondly, the data is transmitted when one of the devices transmits or absorbs the TV signal and the second device monitors changes in signal level.
When the first reflecting device, a normal signal level becomes higher when absorbs - below. Comparing the difference in signal strength, created virtualnalnaya sequence of bursts and falls, which can be interpreted as the virtual ones and zeros. Already the current version of the device transmits data at a speed of 10Kbit/sek if they are separated by 30 cm when the distance increases to a meter, speed drops to 100 bits / sec. However, researchers believe that these performance results and can be improved. In addition, the new product can be used as a more informative alternative to NFC.
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