Defence USA is working on wireless signal strength for under water
DARPA, the onderzoekstak of the U.s. army, is working on a wireless signal in tunnels, caves and under water to use.
Since regular wireless signals with a high frequency under water and under the ground do not penetrate, does DARPA to an antenna very low frequencies to transmit and receive.
‘A Mechanically Based Antenna’ (AMOEBA) in the ultra low frequency of 1Hz to 3kHz and the very low frequency 3kHz to 30kHz broadcast. Such signals may include materials such as water and stone penetrate, where regular cellular signals can’t.
Data with a high bandwidth can the technique not be sent, but the exchange of messages on places where it is now not possible thanks to technology, according to DARPA. Unlike regular antennas must AMEBA-antenna physical moving components to produce a signal.
The technology is portable and thus interesting to make, DARPA, however, a powerful electromagnet in a relatively small space can stop, and the power consumption of such a magnet greatly reduce. Need new chemical materials and designs are made, partly for the magnet to move and so the signal to generate.
During the Cold War has also experimented with the transmission of data via very low frequencies, to commands to submerged submarines. Then it was to send a little bit of data still, however, an installation of 8 square kilometers with 26 antennas with heights up to 300 feet.
DARPA goes on January 6, with scientists and companies around the table to see how the plans the best can be developed. In the first instance, the technology is intended to provide soldiers a means of communication to indicate that on land, in water and under ground works.
Often, techniques of DARPA in the longer term, it is also available for the larger public. It was DARPA in the creation of the internet and gps.
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