St. Petersburg scientists have demonstrated the technology of efficient wireless energy transmission. As an experiment, they managed to light an LED lamp, while at a distance of a couple of tens of centimeters.
When it all began
The first experiments on wireless power transmission were carried out at the beginning of the last century by Nikola Tesla. However, then it remained unclaimed due to the complexity and extremely low efficiency.
More than 100 years later, new technologies have given wireless power transmission a second wind. So in 2007, Marin Solyanovich, a professor at the Massachusetts Institute of Technology, together with his colleagues, managed to light a 60-watt light bulb with the help of two resonating copper coils located at a distance of 2.5 meters from each other without any wires.
What our scientists have done
The example of American scientists inspired their Russian colleagues from St. Petersburg, representing ITMO University and the Girikond Research Institute, to create a similar device, but based on dielectric ceramic resonators and a higher operating frequency.
Experiments have shown that Russian know-how is more effective. The magnetic field created by the resonators had a more complex structure and a lower attenuation coefficient, as well as greater resistance to changes in the relative position of the receiver and the power source.
So far, the results are modest, but according to scientists, very encouraging: energy with a power of 1 W and a frequency of 2 GHz was able to be "thrown" at a distance of about 30 cm. Currently, tests are underway with modified components that will increase the transmission distance.