Found a way to wirelessly transmit scattered energy over long distances with an efficiency of 99.99%
Using the new method, the researchers have achieved wireless transmission of scattered energy over long distances with virtually no loss.
Scientists began looking for a way to efficiently transmit electricity through the air since the late 19th century. Wireless charging systems are already available, but they only work over short distances.
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Existing technologies that make it possible to achieve long-distance transmission are based on the focusing of narrowly directed beams of energy, precisely aimed at a specific target. However, they have insufficient efficiency, and their functioning is associated with certain threats due to concentrated energy flows in the air.
A team of physicists from the University of Maryland, College Park and the University of Wesleyan have found a way to improve the technology by applying the concept of an anti-laser that does not generate, but perfectly absorbs a beam of precisely tuned photons. In the course of research, they created a device capable of perfectly absorbing energy from an unfocused source.
The team’s coherent electromagnetic wave absorber consists of a maze of randomly interconnected wires and boxes, passing through which microwaves are forever entangled and transformed. By determining the optimal frequencies, amplitudes and phases of the input waves, physicists have achieved 99.999% absorption of microwave cure.
The researchers then placed the device in a brass cavity with a bizarre hole that scattered microwaves in an unpredictable and chaotic manner. Under such conditions, the efficiency of coherent absorption was 99.996%.
According to the team, this method will create a long-range wireless charging system that can work in any environment, such as an office building. Although it will require individual adjustment for each object for efficient power transmission, the need to focus radiation will disappear.
Despite the low efficiency of existing systems, they are beginning to be implemented on an industrial scale. For example, from 2021, New Zealand will begin field testing the first wireless power line in 40m increments.
, Marc Simon Frei