www.free-thinkers.eu Microwave signals turned into electrical power
Guest@ | PATH: /reblog/technology/microwave-signals-tu...

Microwave signals turned into electrical power

Source: http://www.bbc.co.uk/news/technology-24897584...

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. 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. They also believe that it could help users living in remote areas without access to the power grid. They would be able to "harvest" the energy from signals generated by mobile phone towers. "Our work demonstrates a simple and inexpensive approach to electromagnetic power harvesting," said Mr Cummer. "The beauty of the design is that the basic building blocks are self-contained and additive. One can simply assemble more blocks to increase the scavenged power." The full report will be published in the journal Applied Physics Letters in December.

Other recent posts in /reblog/technology...


The Enfield Thunderbolt: An electric car before its time

By By David Prest 28th November 2013 Earlier this year Nissan began production in Sunderland of the Leaf, the first electric car to be mass-produced in the UK. But 40 years ago, about 100 electric cars were built on the Isle of Wight to a design that was years ahead of its time. The Enfield 8000 was a prototype electric vehicle which emerged out of a competition run by the United Kingdom Electricity Council in 1966.

Japanese engineers plan to turn the moon into a giant solar panel station

By Thair Shaikh 28th November 2013 It sounds like a tale from a science fiction novel, but a team of Japanese engineers really is hoping to turn the moon into a giant solar panel. Shimizu, a giant civil engineering and construction firm, plans to install a 'solar belt' around the moon's equator. To be built almost entirely by remote-controlled robots, the Luna Ring would run around the 6,800 mile lunar equator and be 248 miles in width.

Warning your connection is not encrypted

Please consider using SSL (https://) encryption while browsing www.free-thinkers.eu. Note we do not pay for our SSL certificate, it is self signed. If you get a warning you can safely ignore it. If using Firefox, consider permanently allowing our certificate in your browser. Click the link to use an SSL connection to this page: https://www.free-thinkers.eu/reblog/technology/microwave-signals-turned-into-electrical-power