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Wireless device converts 'lost' energy into electric power [Galt's Motor?}
Phys.Org ^ | 11-07-2013 | Provided by Duke University

Posted on 11/08/2013 10:12:29 AM PST by Red Badger

Using inexpensive materials configured and tuned to capture microwave signals, researchers at Duke University's Pratt School of Engineering have designed a power-harvesting device with efficiency similar to that of modern solar panels.

The device wirelessly converts the microwave signal to direct current voltage capable of recharging a cell phone battery or other small electronic device, according to a report appearing in the journal Applied Physics Letters in December 2013. (It is now available online.)

It operates on a similar principle to solar panels, which convert light energy into electrical current. But this versatile energy harvester could be tuned to harvest the signal from other energy sources, including satellite signals, sound signals or Wi-Fi signals, the researchers say.

The key to the power harvester lies in its application of metamaterials, engineered structures that can capture various forms of wave energy and tune them for useful applications.

Undergraduate engineering student Allen Hawkes, working with graduate student Alexander Katko and lead investigator Steven Cummer, professor of electrical and computer engineering, designed an electrical circuit capable of harvesting microwaves.

They used a series of five fiberglass and copper energy conductors wired together on a circuit board to convert microwaves into 7.3V of electrical energy. By comparison, Universal Serial Bus (USB) chargers for small electronic devices provide about 5V of power.

"We were aiming for the highest energy efficiency we could achieve," said Hawkes. "We had been getting energy efficiency around 6 to 10 percent, but with this design we were able to dramatically improve energy conversion to 37 percent, which is comparable to what is achieved in solar cells."

"It's possible to use this design for a lot of different frequencies and types of energy, including vibration and sound energy harvesting," Katko said. "Until now, a lot of work with metamaterials has been theoretical. We are showing that with a little work, these materials can be useful for consumer applications."

For instance, a metamaterial coating could be applied to the ceiling of a room to redirect and recover a Wi-Fi signal that would otherwise be lost, Katko said. Another application could be to improve the energy efficiency of appliances by wirelessly recovering power that is now lost during use.

"The properties of metamaterials allow for design flexibility not possible with ordinary devices like antennas," said Katko. "When traditional antennas are close to each other in space they talk to each other and interfere with each other's operation. The design process used to create our metamaterial array takes these effects into account, allowing the cells to work together."

With additional modifications, the researchers said the power-harvesting metamaterial could potentially be built into a cell phone, allowing the phone to recharge wirelessly while not in use. This feature could, in principle, allow people living in locations without ready access to a conventional power outlet to harvest energy from a nearby cell phone tower instead.

"Our work demonstrates a simple and inexpensive approach to electromagnetic power harvesting," said 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."

For example, a series of power-harvesting blocks could be assembled to capture the signal from a known set of satellites passing overhead, the researchers explained. The small amount of energy generated from these signals might power a sensor network in a remote location such as a mountaintop or desert, allowing data collection for a long-term study that takes infrequent measurements.


TOPICS: Business/Economy; Culture/Society; Technical; US: North Carolina
KEYWORDS: battery; cellphone; energy; stringtheory; wifi
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This five-cell metamaterial array developed at Duke University has a power-harvesting efficiency of 36.8 percen -- comparable to a solar cell. Credit: Duke University

1 posted on 11/08/2013 10:12:29 AM PST by Red Badger
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To: ShadowAce

Ping!.............


2 posted on 11/08/2013 10:12:45 AM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: Publius; Billthedrill

Galt ping!


3 posted on 11/08/2013 10:14:50 AM PST by Still Thinking (Freedom is NOT a loophole!)
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To: Red Badger; SunkenCiv
Thanks, for the Post.
Science PING!

4 posted on 11/08/2013 10:16:28 AM PST by skinkinthegrass (who'll take tomorrow,$pend it all today;who can take your income & tax it all away..0'Blowfly can :-)
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To: Red Badger

Cool.


5 posted on 11/08/2013 10:17:44 AM PST by EEGator
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To: Red Badger

Very cool. I also wonder if you ‘turned up the heat’ if this could somehow be used to be a EM dampener for avoiding detection.


6 posted on 11/08/2013 10:18:41 AM PST by Free Vulcan (Vote Republican! You can vote Democrat when you're dead...)
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To: Red Badger
They used a series of five fiberglass and copper energy conductors wired together on a circuit board to convert microwaves into 7.3V of electrical energy.

That's nice.

How many watts?

7 posted on 11/08/2013 10:21:45 AM PST by DuncanWaring (The Lord uses the good ones; the bad ones use the Lord.)
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To: Free Vulcan

I was thinking it could be used to power bugs - listening devices - anywhere the CIA or whoever would want to use them..............


8 posted on 11/08/2013 10:23:31 AM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: DuncanWaring

With today’s microelectronics, one must think in terms of microwatts...............


9 posted on 11/08/2013 10:24:39 AM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: DuncanWaring

Thanks, good point.

You can have all the volts in the world and they won’t power a cell phone without some amps.


10 posted on 11/08/2013 10:25:39 AM PST by garyb
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To: Red Badger

But can you charge an RV battery with it?


11 posted on 11/08/2013 10:25:57 AM PST by cicero2k
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To: Red Badger

The universe is Avery energetic place. Harvest the energy of the Big Bang?


12 posted on 11/08/2013 10:28:02 AM PST by AFreeBird
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To: Red Badger

Incremental improvement, not news.

....for more, Google “rectenna”


13 posted on 11/08/2013 10:28:12 AM PST by bigbob (The best way to get a bad law repealed is to enforce it strictly. Abraham Lincoln)
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To: Still Thinking; Publius; Billthedrill
wouldn't N. Tesla's work the same?

14 posted on 11/08/2013 10:31:26 AM PST by skinkinthegrass (who'll take tomorrow,$pend it all today;who can take your income & tax it all away..0'Blowfly can :-)
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To: skinkinthegrass

15 posted on 11/08/2013 10:33:40 AM PST by EEGator
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To: bigbob

Incremental is right. This might have some limited uses but it is nothing like solar panels that capture the energy of the sun that is out out for free. There is no large free source of microwaves to harvest for serious electricity generation.. But I could see this possibly recharging a cell phone ...somewhat


16 posted on 11/08/2013 10:35:10 AM PST by dennisw (The first principle is to find out who you are then you can achieve anything -- Buddhist monk)
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To: cicero2k
But can you charge an RV battery with it?

If you drive around areas with lots of WiFi hotspots maybe.

17 posted on 11/08/2013 10:35:57 AM PST by doorgunner69
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To: Red Badger

Hmmmm..I could bake a potato in my microwave and recharge my cell phone at the same time.


18 posted on 11/08/2013 10:37:21 AM PST by count-your-change (you don't have to be brilliant, not being stupid is enough)
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To: dennisw

I’ve found that most PR hype out of universities corresponds with getting the alumni all fired-up for a big fund-raising campaign.


19 posted on 11/08/2013 10:43:44 AM PST by bigbob (The best way to get a bad law repealed is to enforce it strictly. Abraham Lincoln)
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To: Red Badger
I was thinking it could be used to power bugs - listening devices - anywhere the CIA or whoever would want to use them..............

Indeed. Back in the day, I'm sure the KGB would have found this invention useful. They probably could have reduced their energizing beam power substantially.


The Great Seal Bug

It was given to Ambassador W. Averell Harriman by "Soviet schoolchildren" in 1945 as a gesture of friendship in the wake of WW2. The bug concealed within remained in place until it was discovered in 1952, during Ambassador George Kennan's tenure.

20 posted on 11/08/2013 10:49:54 AM PST by cynwoody
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To: Red Badger

Wasn’t tesla working on a device to collect and use static electricity when he passed on?


21 posted on 11/08/2013 10:49:56 AM PST by fella ("As it was before Noah so shall it be again,")
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To: AFreeBird
Two patent applications were filed...

March 21, 1901


22 posted on 11/08/2013 10:50:14 AM PST by Rodamala
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To: fella

He was, IIRC...........


23 posted on 11/08/2013 10:51:27 AM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: bigbob

I agree....

Plus this press release puts spin on (for the science deprived) as if they have a lead on microwave cells that would be like solar cells. Collecting-harvesting large amounts of free energy. Where is the free microwave energy? Not too many natural sources. This innovation will collect from meager man made sources (looks to me)

Put it near your m-wave oven and charge your cell phone?


24 posted on 11/08/2013 10:56:54 AM PST by dennisw (The first principle is to find out who you are then you can achieve anything -- Buddhist monk)
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To: Still Thinking; Publius; Billthedrill

May I be added to the Galt ping list.


25 posted on 11/08/2013 11:03:41 AM PST by verga (We used to be the land of the free. Now we’re just the land of the freebie.)
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To: Red Badger

I think I would go for the motor that works on magnetism.

http://freeenergynews.com/Directory/Howard_Johnson_Motor/


26 posted on 11/08/2013 11:06:36 AM PST by mountainlion (Live well for those that did not make it back.)
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To: Free Vulcan

tesla was right.


27 posted on 11/08/2013 11:31:26 AM PST by Secret Agent Man (Gone Galt; Not averse to Going Bronson.)
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To: Red Badger

Watch the Big $$$ power companies buy the patents, and kill it deader than Vince Foster in Fort Marcy park!


28 posted on 11/08/2013 11:43:43 AM PST by Dubh_Ghlase (Therefore, send not to know For whom the bell tolls, It tolls for thee.)
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To: Red Badger

And when he died FDR’s goons swept in and disappeared all his papers. For the betterment of all, of course.


29 posted on 11/08/2013 11:55:54 AM PST by fella ("As it was before Noah so shall it be again,")
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To: Red Badger
Some years ago I worked for a company whose plant was located in a small valley. We found that workers in the basement were unable to receive sufficient signal to trigger their pagers.

I briefly looked into the idea of a passive receiving antenna on the nearby hilltop with a cable leading to a passive transmitting antenna located in the basement.

The problem I saw was that the FCC would probably get on my case for having re-transmitted this signal and the pager company would also be concerned because the receiving antenna would create an area of low signal strength behind the antenna, perhaps depriving other customers of the paging company from receiving their signals.

I can see a similar problem with the devices being suggested in this article. If a room full of people are soaking up the energy from a Wi-Fi there might be just that much less for the folks expecting a connection to the internet. I see much regulation ahead.

30 posted on 11/08/2013 12:11:30 PM PST by William Tell
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To: mountainlion
mountainlion said: "I think I would go for the motor that works on magnetism."

Aren't there places with little or no magnetic field?

I'm waiting for the further development in Brazil of a gravity motor. I don't ever remember not having more than enough gravity. Their company motto will no doubt be, "The motor for people who will fall for anything".

31 posted on 11/08/2013 12:16:03 PM PST by William Tell
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To: William Tell

http://www.bestbuy.com/site/netgear-wi-fi-booster-for-mobile-range-extender/5970343.p?id=1218709599460&skuId=5970343&ref=06&loc=01&ci_src=14110944&ci_sku=5970343&extensionType={adtype}:{network}&s_kwcid=PTC!pla!{keyword}!{matchtype}!{adwords_producttargetid}!{network}!{ifmobile:M}!{creative}&kpid=5970343&k_clickid=36b4d706-f9ae-4e68-eb40-000078103bff


32 posted on 11/08/2013 12:17:23 PM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: William Tell
The guy and motor at the website I posted got patented in the 70’s. With better magnets now it should put out more than the 1700 watts.
33 posted on 11/08/2013 12:18:16 PM PST by mountainlion (Live well for those that did not make it back.)
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To: Red Badger
I'll use an array of these instead of a tin foil hat. Why merely reflect the mind control beams when I can use them to power a small LED.

to convert microwaves into 7.3V of electrical energy. By comparison, Universal Serial Bus (USB) chargers for small electronic devices provide about 5V of power.

Oooooo, volts. How about power instead.

Consider a powerful AM station like WLW (50 kilowatt transmit power). At 1 km away, assuming no atmospheric absorption and and omnidirectional pattern (not true but good for a first estimate), you would have an energy flux of about 4 milliwatts per square meter. Now consider that most of the transmitters they are talking about are in the milliwatt to watt range instead of 50 kW.

Compare that to solar which has an energy flux of about 1 kilowatt / square meter at ground level on a sunny day.

34 posted on 11/08/2013 12:19:21 PM PST by KarlInOhio (Everyone get online for Obamacare on 10/1. Overload the system and crash it hard!)
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To: ADemocratNoMore; Aggie Mama; alarm rider; alexander_busek; AlligatorEyes; AmericanGirlRising; ...

Discovered in the ruins of the Twentieth Century Motor Company in Starnesville, Wisconsin.


35 posted on 11/08/2013 12:37:01 PM PST by Publius ("Who is John Galt?" by Billthedrill & Publius is now available at Amazon.)
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To: Publius

Starnesville - Detroit.


36 posted on 11/08/2013 12:47:07 PM PST by wally_bert (There are no winners in a game of losers. I'm Tommy Joyce, welcome to the Oriental Lounge.)
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To: Red Badger; All

They mention vibrations being useful to create power. I wonder if wind power could be used to vibrate materials that are attached to dynamos to create power verses using spinning turbines that kill birds! Imagine “wires” with a series of attached discs that “flutter” as the wind passes thru. The wire transmits all that kinetic energy to a sub dynamo that creates current which is collected via huge capacitors then sent out onto the grid . The discs could be connected by guide wires so that they flutter with some coherency to increase efficiency of the kinetic energy to be transferred. The height of the unit and/or the use of multiple grids of these strings in a collector allow a scaling of power collected per unit allowing decent power collection in low breeze conditions and vent dampeners could be used to moderate flows in potentially damaging high wind events.

Now my betters might could use math to tell one if such a system could be made to produce power efficiently based on equipment costs; but it seems to me that any power produced at all is better than no power at all when a shtf knocks out services over a wide area.

There is power in a plucked string of a violin that can sooth the soul. Perhaps a power system comprised of “wind plucked strings” connected to electrical dynamos can be scaled up to provide a useful niche in off the grid power production systems. Perhaps we could call such a system a “harp” system, with no relation to the “spook system” the military runs.


37 posted on 11/08/2013 1:23:32 PM PST by mdmathis6
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To: mdmathis6

Google ‘VERTICAL WINDMILL IMAGES’.....There are lots of windmill designs out there that will not kill birds.................


38 posted on 11/08/2013 1:29:40 PM PST by Red Badger (Proud member of the Zeta Omicron Tau Fraternity since 2004...................)
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To: Red Badger
I was thinking it could be used to power bugs - listening devices - anywhere the CIA or whoever would want to use them..............

Ding! Ding! Ding!

I believe we have a winner.

I'm sure the NSA is thrilled at the prospect.  

39 posted on 11/08/2013 1:35:52 PM PST by zeugma (Is it evil of me to teach my bird to say "here kitty, kitty"?)
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To: EEGator
Yeah..that's it! Thanks.

40 posted on 11/08/2013 5:58:42 PM PST by skinkinthegrass (who'll take tomorrow,$pend it all today;who can take your income & tax it all away..0'Blowfly can :-)
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To: fella
actually, they were sent back Mother Russia Yugoslavia (Croatia)

41 posted on 11/08/2013 6:07:12 PM PST by skinkinthegrass (who'll take tomorrow,$pend it all today;who can take your income & tax it all away..0'Blowfly can :-)
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To: 6SJ7; AdmSmith; AFPhys; Arkinsaw; allmost; aristotleman; autumnraine; backwoods-engineer; ...

Thanks Red Badger.

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42 posted on 11/08/2013 8:40:50 PM PST by SunkenCiv (http://www.freerepublic.com/~mestamachine/)
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To: Red Badger

IIRC, Tesla showed a famous bulbous nosed banker this technology and when the banker was told he couldn’t put a meter on every receiver and make money that way, the banker dropped his interest in Tesla’s technological genius.


43 posted on 11/08/2013 9:42:58 PM PST by MHGinTN (Being deceived can be cured.)
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To: Red Badger
I"M Ready!


44 posted on 11/08/2013 9:56:14 PM PST by Bullish (The only real solution is to abolish liberal democrats forever)
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To: cicero2k

That USB analogy’s really bad technical writing, but I’m afraid it’s typical these days.


45 posted on 11/09/2013 1:14:47 AM PST by clearcarbon
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To: MHGinTN

46 posted on 11/09/2013 7:38:31 AM PST by EEGator
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To: EEGator

The very one ... demon-seed of the current globalist oligarchy.


47 posted on 11/09/2013 7:46:25 AM PST by MHGinTN (Being deceived can be cured.)
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To: Rodamala

And the gubment snatched up all his work when he died.

Edison got all the accolades, but Tesla electrified the world, and who knows what else.


48 posted on 11/09/2013 7:12:56 PM PST by AFreeBird
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To: Red Badger

We used to wrap a copper wire ‘round an oatmeal box and rectify the signal with a crystal doohickey and listened to radio stations from around the world. Now they invented a new fangled way of doing the same darn thing. Betcha it’ll cost more too!


49 posted on 11/09/2013 7:41:11 PM PST by whodathunkit
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To: Red Badger

NICE Christmas present


50 posted on 11/09/2013 9:19:46 PM PST by TomasUSMC
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