Dr. Serkan Toto is currently working as the first and only Asian-based writer for the TechCrunch network, mainly covers with Japan technology and Web companies for TechCrunch, CrunchGear and MobileCrunch. Serkan also works full-time as an independent Internet and mobile industry consultant with a focus on the Japanese market. He is Saint lingual, holds an MBA and a doctorate in economics. Serkan ... ? Read More
Gleaning electricity from radio signals are not super efficient (or new concept), but it is possible technically. Two companies from Japan has recently come up with new devices that can do just that: a harvesting energy from the cell phone signals, another uses a rectifying antenna (Rectenna) for energy production.
Firstly the device [JP] recently announced Tokyo electronic device can pick up radio signals from cell phones between 800 Mhz and convert them into electricity (800 Mhz frequency is used in mobile phones in Japan). The company says that users can expect to get to 2.5 free milliamperes (stored in the small lithium ion battery).
Device gathers signals from other wireless gadgets, too, and it can provide a few minutes running time is built into tablets and laptops (that's better than nothing). Tokyo Electron markets as "green" product and collaborates with the American company Powercast in its development.
We do not have this device, but professional video shot of the next one, recently developed Rectenna from the Tokyo-based Nihon Dengyo Kosaku. Device (pictured above) itself has two main points of sale: he is thin (12 mm to collect signals from Wi-Fi and 30 mm for digital terrestrial broadcasting waves) and needs just 50 µW authorities begin.
Nihon Dengyo said that their Rectenna can get power in micro Watt range from Wi-Fi signals at a distance of about 10 cm, enough to power sensors, for example. The device can be used both inside and outside buildings.
Here's the video (shot by Diginfonews in Tokyo in English), which provides better:
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