Prototype Nokia phone recharges without wires
2009-06-23 0:00

wwwRediceCreations.com

Prototype Nokia phone recharges without wires.

By Christopher Null | www.YahooTech.ca

Pardon the cliche, but it's one of the holiest of Holy Grails of technology: Wireless power. And while early lab experiments have been able to "beam" electricity a few feet to power a light bulb, the day when our laptops and cell phones can charge without having to plug them in to a wall socket still seems decades in the future.

Nokia, however, has taken another baby step in that direction with the invention of a cell phone that recharges itself using a unique system: It harvests ambient radio waves from the air, and turns that energy into usable power. Enough, at least, to keep a cell phone from running out of juice.

While "traditional" (if there is such a thing) wireless power systems are specifically designed with a transmitter and receiver in mind, Nokia's system isn't finicky about where it gets its wireless waves. TV, radio, other mobile phone systems -- all of this stuff just bounces around the air and most of it is wasted, absorbed into the environment or scattered into the ether. Nokia picks up all the bits and pieces of these waves and uses the collected electromagnetic energy to create electrical current, then uses that to recharge the phone's battery. A huge range of frequencies can be utilized by the system (there's no other way, really, as the energy in any given wave is infinitesimal). It's the same idea that Tesla was exploring 100 years ago, just on a tiny scale.

Mind you, harvesting ambient electromagnetic energy is never going to offer enough electricity to power your whole house or office, but it just might be enough to keep a cell phone alive and kicking. Currently Nokia is able to harvest all of 5 milliwatts from the air; the goal is to increase that to 20 milliwatts in the short term and 50 milliwatts down the line. That wouldn't be enough to keep the phone alive during an active call, but would be enough to slowly recharge the cell phone battery while it's in standby mode, theoretically offering infinite power -- provided you're not stuck deep underground where radio waves can't penetrate.

Nokia says it hopes to commercialize the technology in three to five years.

Article from: YahooTech.ca




Nokia developing phone that recharges itself without mains electricity.

By Duncan Graham-Rowe | www.Guardian.co.uk

Standby mode is often accused of being the scourge of the planet, insidiously draining resources while offering little benefit other than a small red light and extra convenience for couch potatos. But now Nokia reckons a mobile phone that is always left in standby mode could be just what the environment needs.


Nokia's Research centre in Helsinki. Photograph: Antti Aimo-Koivisto/AFP/Getty Images


A new prototype charging system from the company is able to power itself on nothing more than ambient radiowaves – the weak TV, radio and mobile phone signals that permanently surround us. The power harvested is small but it is almost enough to power a mobile in standby mode indefinitely without ever needing to plug it into the mains, according to Markku Rouvala, one of the researchers who developed the device at the Nokia Research Centre in Cambridge, UK.

This may sound too good to be true but Oyster cards used by London commuters perform a similar trick, powering themselves from radiowaves emitted by the reader devices as they are swiped. And similarly old crystal radio sets and more recently modern radio frequency identification (RFID) tags, increasingly used in shipping and as antitheft devices, are powered purely by radiowaves.

The difference with Nokia's prototype is that instead of harvesting tiny amounts of power (a few microwatts) from dedicated transmitters, Nokia claims it is able to scavenge relatively large amounts of power — around a thousand times as much — from signals coming from miles away. Individually the energy available in each of these signals is miniscule. But by harvesting radiowaves across a wide range of frequencies it all adds up, said Rouvala.

Such wireless transfer of energy was first demonstrated by Nikola Tesla in 1893, who was so taken with the idea he attempted to build an intercontinental transmission tower to send power wirelessly across the Atlantic. Nokia's device is somewhat less ambitious and is made possible thanks to a wide-band antenna and two very simple circuits. The antenna and the receiver circuit are designed to pick up a wide range of frequencies — from 500 megahertz to 10 gigahertz — and convert the electromagnetic waves into an electrical current, while the second circuit is designed to feed this current to the battery to recharge it.

The trick here is to ensure that these circuits use less power than is being received, said Rouvala. So far they have been able to harvest up to 5 milliwatts. Their short-term goal is to get in excess of 20 milliwatts, enough power to keep a phone in standby mode indefinitely without having to recharge it. But this would not be enough to actually use the phone to make or receive a call, he says. So ultimately the hope is to be able to get as much as 50 milliwatts which would be sufficient to slowly recharge the battery.

Steve Beeby, an expert in harvesting ambient energy at the University of Southampton, said it would be a remarkable achievement. . "Radio frequency power falls off exponentially with distance," he says. Earlier this year researchers at Intel and the University of Washington, in Seattle, showed that they could power a small sensor using a TV signal 4.1 kilometres away.

Wireless charging is not intended as a sole energy source, but rather to be used in conjunction with other energy harvesting technologies, such as handset casings embedded with solar cell materials. According to Technology Review magazine, the phone could be on the market in three to five years.

Article from: Guardian.co.uk






They tried to make the world forget his name - Nikola Tesla the greatest Inventor of all time

Video from: YouTube.com

University of Florida Develops Wireless Charging Station

Video from: YouTube.com




Related Articles
Wireless energy transfer
Wireless Power Harvesting for Cell Phones
Harnessing Direct Solar Power for Propulsion
Scientists Say Cell Wireless Phones Harmful, Call for Safety Standards
Wireless Technologies Of The Future: RFID And Navigation?
Wireless energy promise powers up
Physicist moots wireless electricity


Latest News from our Front Page

Netanyahu ‘spat in our face,’ White House officials said to say
2015-01-23 22:28
The White House’s outrage over Prime Minister Benjamin Netanyahu’s plan to speak before Congress in March — a move he failed to coordinate with the administration — began to seep through the diplomatic cracks on Friday, with officials telling Haaretz the Israeli leader had “spat” in President Barack Obama’s face. “We thought we’ve seen everything,” the newspaper quoted an unnamed senior ...
The Return of the Protected Jewish Minority in Europe
2015-01-23 2:53
Contrary to the standard narratives of Jewish ‘history,’ a prominent feature of the historical presence of Jews in Europe has been their protected status. The common context for this status was a symbiotic relationship between the Jewish minority and exploitative or tyrannical elites. As agents of the feared elite, as foreigners, as exploiters in their own right, and with interests ...
Truth Revealed: McCain’s ‘Moderate Rebels’ in Syria ARE ISIS
2015-01-23 1:50
Poor John McCain and Lindsey Graham, Washington’s real first couple. They only want to arm the ‘moderate opposition’ in Syria. Three years on, how come their master plan isn’t working, while ISIS has grown so strong? Despite what media lauded as, “the largest demonstration in France’s history – bigger than liberation at the end of WWII!” (can you rightly compare the ...
European 'No-Go' Zones: Fact or Fiction?
2015-01-22 0:37
Comment: This is an interesting article about Muslim no-go Zones in Europe. However, keep in mind that the focus in this piece is not addressing the root of the problem, but a symptom of the problem. Yes, there is an issue with large Islamic colonies in Europe today, but the article mentions nothing about who has changed the immigration laws ...
A Radical Traditionalist Critique of the Anti-Islam Movement
2015-01-22 0:20
The terrorist attack against the staff at the magazine Charlie Hebdo in Paris shook an entire continent. In a European climate in which protests against the perceived Islamization of our civilizational sphere becomes ever more widespread, showing in increased electoral success for moderate nationalist parties, as well as in expressions of mass public dissent, the recent resurgence of violent Islamic ...
More News »