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Energy from the air will recharge the smartphone

07.06.2015

New technology developed by Ohio State University researchers can extend smartphone battery life by up to 30% by extracting energy from radio waves.

When transmitting signals between mobile devices, base stations and Wi-Fi routers, a large number of waves are scattered. According to one of the authors of the development Chi-Chi Chen (Chi-Chih Chen), who specializes in the design of wireless antennas, only about 3% of radio waves reach the target. By developing a special system, engineers were able to extract energy from the remaining 97% and send it to recharge the battery of the device.

The system consists of an antenna that receives radio waves and a rectifier that converts the alternating current in the antenna into direct current needed to charge the battery. A special controller is responsible for managing the system.

The system allows you to get microwatts of energy. This is not enough to power a smartphone that consumes a thousand times more energy, but it is enough to extend the life of the gadget, Chen explained.

According to Chen, energy extraction occurs only when the smartphone is transmitting a signal. When receiving a signal, the function is disabled. The system uses the smartphone's own signal, while the quality of communication remains at a high level.

The idea of converting radio signals into electricity may seem far-fetched, but the underlying principle is as old as electricity. The fact is that radio waves are actually a high-frequency form of alternating current.

The inventors patented the technology and sold the rights to use it to the American startup Nikola Labs. In early May 2015, TechCrunch Disrupt in New York demonstrated the first product based on it - a case for the iPhone 6, which includes all the necessary system components. In June 2015, the startup plans to launch fundraising for the production of cases on the Kickstarater crowdfunding website. It is expected that the cost of such an accessory will be $100. Deliveries are scheduled to begin within a 4-month period.

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