Researchers at the Nokia Research Centre in UK are working on a new way to keep our phones charged that does not need charger or any other accessory. Sounds farfetched? Not really. They are developing a technology that can harness power from ambient radio waves, which in simpler words mean waves emitted by Wi-Fi transmitters, cell phones, microwaves etc. Their key to success is to convert these waves into electrical energy to charge the phone.
The team has built various prototypes that can harvest power of up to 5 milliwatts. However, the power harvested is not enough because a phone needs at least 50 milliwatts for recharging the phone while switched off.
Nokia’s research team reckons they can build this technology into a product within the next four years but others are highly skeptical about this.
Joshua Smith from Intel says, “50 milliwatts could require around 1,000 strong signals and that an antenna capable of picking up such a wide range of frequencies would cause efficiency losses along the way.”
Others too voice Smith’s opinion by claiming this feat as unachievable. Steve Beeby, engineer and physicist at a UK university says. “If they can get 50 milliwatts out of ambient RF, that would put me out of business.”
[Via Technologyreview]
Hello this is very good project and one day i think that can mobile charge with em wave or not? and than for this idea i can searched and find this is possible.best of luck for this project.i am engineering student.