MIT Research Team Develops Model for Wireless Power
November 16, 2006 1:56 AM
comment(s) - last by
Marin Soljacic says he has the answer to wireless power, at least up to 5 meters - Image courtesy MIT
The idea of wireless energy transfer has been around for a number of years, but now MIT believes it can be done inside the lab
Massachusetts Institute of Technology (MIT) researchers
have created a system that is theoretically able to power electronic devices
wirelessly. Assistant Professor Marin Soljacic of the Department of Physics and Research Laboratory of Electronics, along with MIT graduate students Aristeidis Karalis and John Joannopoulos, are working on the "evanescent coupling" technology.
The primary downfall of other power-over-air technologies is the fact that they are extremely directional or extremely dangerous. The first roadblock in wireless power is traditionally solved by simply increasing the power and using omni-directional antennas. This unfortunately gives rise to the second downfall; enough of an increase in power to make omni-directional useful traditionally results in so much energy trasmitted that it is no longer safe for humans to stand near the device.
Soljacic's team attempts to solve this problem by building an antennas that create electromagnetic fields that resonate at particular frequencies and loop back into the device rather than completely emit out into the atmosphere. When two of these antennas operating at the same frequency have resonance loops that collide, one large loop closes between the devices and high power transmission can begin over the new electromagnetic loop.
The technology, at least in theory, should work at distances of up to five meters. Unfortunately, the team has not yet constructed or tested the system -- even though computer simulations and theoretical calculations both suggest that it should work.
This article is over a month old, voting and posting comments is disabled
RE: Amazing. :D
11/16/2006 6:16:17 AM
I only have one thing to say:
RFID as used in passports, proximity access cards, goods tracking..... have NO onboard power source.
The power they require is sent by the reader using an induction technique.
I don't really know of applications that need remote power like this (other than say a maglev train).
I would want to minimise the amount of electromagnetic fields anywhere near my body so don't trust this guys invention. Even if you have two fields aligned with constructive interference, what if I happen to stand at that particular point?
Additionally if it uses certain frequencies, it may interfere with television, radio or other important RF transmissions.
Wireless should only be used where necessary and for things it's appropriate to. See the "negraponte switch".
Ideas for wireless usb, wireless hdmi to your tv, are just for lazy people, and more novelty than really useful.
Plus with this tech, what happens if you place more devices into the field area, does it mean less available per device so they stop working?
I'd like to know of some actual useful applications for this technology. Most things can be Li-ion battery powered (LOL not Sony), rechargeable, or carry their own nuclear reactor (submarines, satellites) or use hydrogen fuel cells.
RE: Amazing. :D
11/16/2006 10:25:13 AM
You are right, this is not that big of a discovery, but it's intresting.
However is see a lot of potential in portable devices. And often you forget to charge these devices, but if you have a common place where you put them, you could automatically charge them, or schedule them to charge only when needed. That could be very usueful in wireless thing keyboard and mice. They could get thier power from such a power source, and in combination with a battery be very handy.
"This is about the Internet. Everything on the Internet is encrypted. This is not a BlackBerry-only issue. If they can't deal with the Internet, they should shut it off." -- RIM co-CEO Michael Lazaridis
SpaceX Falcon 9's Seventh Supply Mission to ISS Ends w/ Fiery Stage 1 Explosion
June 28, 2015, 1:10 PM
Cool Science Video: Glowing Millipede Prowls the Nevada Desert
May 18, 2015, 12:00 PM
Newly Discovered Costa Rican Glass Frog is Kermit's Doppelgänger
April 22, 2015, 11:26 AM
Researchers Hope to Find "Exotic" Lifeforms Inside Crater of Dinosaur Killing Meteor
April 14, 2015, 8:47 PM
Mathematician's Sociological Formulation May Explain the "Hipster Paradox"
April 14, 2015, 1:13 PM
Cool Science Video: This is What a McDonald's Burger Looks Like in Your Stomach
April 7, 2015, 1:43 PM
Most Popular Articles
Quick Note: Apple Watch to Get Brick and Mortar Boost From Best Buy
July 27, 2015, 3:00 PM
Exclusive: If Intel and Micron's "Xpoint" is 3D Phase Change Memory, Boy Did They Patent It
July 29, 2015, 10:52 PM
As iPad Sales Wane and Watch Flops, iPhone Saves Apple's Profit With Its Heroics
July 22, 2015, 6:13 PM
Editorial: Reddit Allows Itself to be Hijacked as a Hate Platform For Racist Bigots
July 21, 2015, 6:32 PM
Microsoft July 29 Windows 10 Launch: Freebies, Rollout, and What's Next
July 21, 2015, 2:40 PM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2015 DailyTech LLC. -
Terms, Conditions & Privacy Information