日々更新mobilerA8（Yahoo!ニュースを毎日ウォッチ）

BBCより。
マイクロウェーブを電力に変える　

史上最強カラー図解　プロが教える太陽電池のすべてがわかる本 新品価格 ￥1,575から (2013/11/12 16:52時点)

電磁ケーブルは携帯電話の充電のために開発されてきた。デュークユニバーシティの研究チームはソーラーパネルに利用してきたという。あるゆる波長を電気に変えることができるという。携帯電話に充電をしたりする一般の目的にも使えるようになるということ。今のところ１０％ぐらいの効率のようだが３７％まで上げられる設計はあるという。
Microwave signals turned into electrical power
http://www.bbc.co.uk/news/technology-24897584
An electrical current capable of charging a mobile phone has been created from microwave signals.

A team from Duke University said the technology they had used had been as efficient as using solar panels.

The device they created used metamaterials, which capture various forms of wave energy and convert them for other applications.

In the future, satellite, sound or wi-fi signals could be "harvested", according to the US researchers.

"We're showing... these materials can be useful for consumer applications," said engineering student Alexander Katko.

Using fibreglass and copper conductors on a circuit board, the researchers converted microwaves into 7.3 volts of electricity. A USB charger, which is often used to recharge mobile phone batteries and cameras, provides about five volts.

"We were aiming for the highest energy efficiency we could achieve," said team member Allen Hawkes.

"We had been getting energy efficiency around 6-10%, but with this design we were able to dramatically improve energy conversion to 37%, which is comparable to what is achieved in solar cells."

Metamaterials are artificial materials that display properties not usually found in nature.
Alexander Katko and Allen Hawkes Alexander Katko and Allen Hawkes designed a "power-harvesting" device

In future, the two students and their colleague Steven Cummer hope that the technology can be built in to mobile phones. This would allow the handsets to recharge wirelessly when not being used.