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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. 


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Amazing. :D
By xFlankerx on 11/16/2006 3:14:25 AM , Rating: 3
I remember asking my dad a few years ago if there was any way to transfer power wirelessly, after seeing something similar in a future-lifestyle depiction in PopSci magazine. At the time, he said that there was no such thing, although it would be a great invention if it was.

Well, apparently its going to happen eventually. :)

I would have to say that this would have to be one of the better inventions in past decades, if it comes to fruition ofcourse. I've always [day]dreamed of connecting one part of the wireless transfer into the wall socket, and the other into the PC and having power be transferred wirelessly.

MIT FTW.




RE: Amazing. :D
By Ascanius on 11/16/06, Rating: 0
RE: Amazing. :D
By Helbore on 11/16/2006 5:47:16 AM , Rating: 2
Oh no, not scaler EM waves. <groans>

Tesla invented a dipole, which was barely any different to a piece of coaxial cable. The only thing he did was produce a feasible electrical transport that didn't require a circuit. He also made correct assumptions about the Earth's resonance, which scientists at the time dismissed. The rest of his Longditudal EM wave experminents were faulty.The produced an effect that could be interpretted as longditudal, simply because of its behaviour, but was entirely typical EM waves.

Let's face it, if the conspiricy reason was true, MIT wouldn't be researching this.


RE: Amazing. :D
By Ascanius on 11/16/2006 6:15:58 AM , Rating: 1
No the rest of his longditudal wave experiments where NOT all faulty at all, he has powered f.eks. a car to a topspeed around 100 miles per hour back in 1935 wich is amazing at White Rock Like with himself and a famely member and for all to see, just seach it and you will find many official stories about the event.

Also both the American and Russian Millitary uses Longditudal waves for many things, look into that and you will get supprised.
A lot of both sides radar stations are nothing but lingitutional transmitters for powering distant "things"

The Russian have made the biggest efforts in longititional waves from what i have papers on, Tom Bearden knows a lot about this area.

If you get into science related to this it is really already being used, just not commercially as it is what i will just call "blocked"

And regarding the conspiracy, i will say "what conspiracy" it is fact for every one with eyes, ears and a brain to see.

You just have to know how to get the info, so if you cannot get the info it does not mean that it is not there nor does it mean that something is not real, it just means that YOU cannot find out.

Also this closed very short range loop will NOT affect the "big monkey" in any way, so why shoult MIT not research it? as it is something that can be sold and will surely have a nice loss in performance, hense use more power than with a wire.

Just like most hybrid cars, uses more power pr mile, costs more to build and there is more to be repaired, fits like hand in a glove in the industrialism point of view.


RE: Amazing. :D
By Helbore on 11/16/2006 8:01:01 AM , Rating: 2
I've read all this stuff before. I've read all that stuff by Tom Bearden about Tesla Howitzers and the Russians shaking the Earth with Scaler EM waves. The information is all there and I have seen it, but for anyone with the slightest critical scientific mind, its all too easy to see the flaws in this stuff.

Its rubbish that is based on some science and blown off into some crazy sci-fi conspiricy world. Tesla's experiments weren't in fault. They did work, but he wasn't producing longditudal EM waves. The eivdence of this is all too easy to find and, more still, all to easy to reproduce if you happen to be an electrical engineer.


RE: Amazing. :D
By SilthDraeth on 11/16/2006 12:44:50 PM , Rating: 2
I have to /agree with Helbore on this. I have studied up on Tesla, and the guy was most definitely a super genius, rivaling Einstein, and at least equal to him, though Tesla was considered more insane.

I haven't read all this conspiracy theories about scaler EM waves, but it sounds like a ton of hog wash to me.


RE: Amazing. :D
By peternelson on 11/16/2006 6:16:17 AM , Rating: 4
I only have one thing to say:

RFID.

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
By leidegre on 11/16/2006 10:25:13 AM , Rating: 2
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.


RE: Amazing. :D
By jskirwin on 11/16/2006 8:47:54 AM , Rating: 2
quote:
It is only because of the "social" ways of how it works, that we have never seen it used, as no one would give away electricity for free


The electricity has to be generated and then transferred by traditional methods to an antenna. As long as there's an electric meter between the power station and antenna, the power will not be free - nor will any new type of electric metering system be required.


RE: Amazing. :D
By Helbore on 11/16/2006 10:39:11 AM , Rating: 2
He's talking abour Scalar EM waves (zero-point energy) which supposedly exists everywhere and can be just tapped into. The "theory" claims we can use E=TC2 (that's energy equals time multiplied by the square of the speed of light) just the same as E=MC2. In other words, time is compressed energy and we can convert it into useful energy.

It's complete bull. Even Tesla never suggested any of this rubbish, but its what these internet conspiricy sites bark on about when they talk about Longditudal EM waves. Like I said before, a little bit of real science, a load of sci-fi inventions.


RE: Amazing. :D
By Helbore on 11/16/2006 10:41:16 AM , Rating: 2
Add to that, Tom Bearden descrbes how scalar waves can be used for mind-control so powerful it can even get through those little foil hats.


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