Researchers from Aalto University (Finland) have made significant progress in the field of wireless power transmission, perfecting a method for long-distance wireless charging .
By enhancing the interaction between the transmitting antenna and the receiving antenna and using the phenomenon of “radiation suppression”, they achieved high efficiency in transmitting energy over long distances, overcoming the limitations of traditional sensing methods.
Wireless charging over short distances using inductive devices has been shown to be highly efficient at transferring power, but longer distances have not been possible. However, researchers have found a solution to this problem by eliminating the radiation resistance of the loop antenna during power transfer.
Researchers have developed a new theory of wireless charging that takes into account both short-range (non-radiative) and long-range (radiative) distances and conditions.
Through research, it was found that it is possible to eliminate radiation losses, which significantly increases the efficiency of energy transmission by ensuring equal amplitude and opposite phases of the currents in the loop antenna.
Scientists have created a universal method that allows for the analysis or experimentation of any wireless power transmission system. This allows for a comprehensive evaluation of the power transmission efficiency over both short and long distances.
Experimental charging between two loop antennas located at a considerable distance has confirmed that radiation cancellation is the main mechanism for improving transmission performance.
Thanks to the new approach, Aalto University researchers were able to significantly increase the energy transfer distance compared to traditional wireless charging systems, while maintaining high efficiency.
This breakthrough has implications not only for phones and conventional electronics, but also for biomedical implants with limited battery capacity.
The study also takes into account barriers, such as body tissue, that can impede the charging process.
(according to Earthchronicles)
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