Power from the Air Georgia Tech School of Electrical and Computer Engineering professor Manos Tentzeris displays an inkjet-printed rectifying antenna used to convert microwave energy to DC power. This grid was printed on flexible Kapton material and is expected to operate with frequencies as high as 10 gigahertz when complete. Gary Meek

A new ultra-wideband antenna printed on paper or plastic can harvest ambient energy, enabling wireless sensors to tap into electromagnetic currents in the air around them. The device captures energy from a wide spectrum of frequencies, converts it to direct current, and stores it in capacitors or batteries.

Researchers at Georgia Tech scavenged sufficient microwatts to power a temperature sensor, using the ambient energy produced by a television station signal that was a third of a mile away.

More powerful systems that tap into multiple wireless bands could generate one milliwatt or more — enough to power small wireless sensors and microprocessors. Researchers hope that when it’s combined with advanced capacitor technology, the device could provide up to 50 milliwatts.

It’s not exactly the dream of wireless power envisioned by Nikola Tesla, who proposed vast tower networks transmitting electric fields. It’s more akin to siphoning juice from someone else’s battery. When the antenna receives a signal, the electromagnetic energy is converted from AC to DC.

“There is a large amount of electromagnetic energy all around us, but nobody has been able to tap into it,” Manos Tentzeris, a Georgia Tech electrical and computer engineering professor who is leading the research, said in a news release.

Tentzeris’ team has been using inkjet printers to print the devices on paper or plastic. An ink emulsion of silver nanoparticles are used to print radio-frequency sensors and circuits. The current prototype can scavenge power from frequencies ranging from FM radio to radar, from 100 megahertz (MHz) to 15 gigahertz (GHz) or higher, according to a Georgia Tech release.

In an upcoming experiment, Tentzeris’ team plans to activate a small microprocessor-based controller simply by holding it in the air.

Sensor and Antenna: Tentzeris holds a sensor (left) and an ultra-broadband spiral antenna for wearable energy-scavenging applications. Both were printed on paper using inkjet technology.  Gary Meek

The team believes these paper-based wireless scavengers, which are fairly cheap to make, will soon be widely available.

There are plenty of potential uses for them, from supplementary power generation for renewable sources to environmental sensors that scavenge energy from their surroundings. It could also serve as a backup power source, allowing an electronic device to emit a distress signal, according to the news release. They could be used to power RFID tags in anything from food to lumber; sniff for explosives or other chemicals at airports and other secure facilities; and even stress sensors on bridges and other infrastructure.

The researchers demonstrated the technology last week at an IEEE symposium in Spokane, Wash.

[via Georgia Tech Research News]

15 Comments

A Quote from Mr. Nikola Telsa "....In a letter to the editor of the Buffalo Enquirer, Mr. Nikola Tesla replies as follows in regard to an inquiry on the subject of the future of electricity: "The transmission of power has interested me not only as a technical problem, but far more in its bearing upon the welfare of mankind. In this sense I have expressed myself in a lecture, delivered some time ago. "Since electrical transmission of energy is a process much more economical than any other we know of, it necessarily must play an important part in the future, no matter how the primary energy is derived from the sun...." 1896.

How could this "not exactly the dream Nikola Tesla envisioned", this is exactly what he envisioned except that we are tackling it from the opposite direction.

He went full scale before all the pieces of the puzzle are in place and we are doing baby steps with the puzzle almost complete, the final few steps being scaling it up.

Actually, I mention Mr. Nikola Telsa name and one of his quotes, because this kind of technology seems like something he would completely approve. I also mention his name and the year of his quote to draw attention of how early or how ahead his thinking was ahead of the game. I hope people research him on the internet and educate themselves of his ideas. He actually proved he could harness free electricity from the environment. He wanted to develop it and give it away freely to the public. This is why his ideas were stop and not further developed or promoted. Finally, the manner of how he gather electricity is GREEN to the environment.

Tesla was definitely ahead of his time. AC current was a spectacular invention that literally made the modern world possible.

Beyond that though, I wonder if this could be used as a power source for an emergency beacon.. I mean, If you used capacitors, you could probably get it to send out little bursts of power that could act as a beacon if someone is lost.

I think one of the most life-saving techniques would be to put this in ski jackets so that in the event of an avalanche, despite being buried under multiple feet of snow, the thing would still transmit a signal to the surface that would help rescuers.

Great tech.

@BubbaGump,

"He actually proved he could harness free electricity from the environment. He wanted to develop it and give it away freely to the public. This is why his ideas were stop and not further developed or promoted. Finally, the manner of how he gather electricity is GREEN to the environment."

Where are you getting this from?

That's not even close to accurate. He did not "harness free electricity from the environment"... wtf is that even supposed to mean?

His vision was that electricity would be beamed out like radio signals (because in fact they are both just electromagnetic waves). Then people would "tune into" the electricity signal same way you tune into your favorite radio station.

His vision was for having wireless electricity. And, he demonstrated that it was completely possible to do by powering light-bulbs wirelessly, etc.

---

The reason we don't have this technology in use today (and I doubt we ever will) is because it's impossible to charge someone for it, same as it's impossible to charge someone for listening to radio broadcasts.

By the same token, it's not optimally efficient to beam electricity in this way when compared to transmitting it through a wire.

---

This article states that this energy antenna isn't Testla's vision because it has a completely different motive. Tesla wanted to beam electricity to people for them to use directly, this antenna captures "waste energy" that is the result of some other profitable endeavor.

It's the same as someone capturing and using natural gas--which was "wasted" by simply being burned off--during crude oil extraction.

Now I'll never have to find batteries for the T.V. remote ever again. Another obstacle out of the way for me to watch T.V. endlessly...

...now if only I could find the remote to begin with or figure out which other one can control the T.V???

@B.V. I guess you not familiar with static electricity or lighting and being a nature source of electrical power. But ok ok, I see your view point, you type WTF and so you make a good argument, brillant. Yes our electrical engineers are highly advance, but fact their are many natural electrical forces that occur everyday that are not currently being exploited. I did suggest reading to look Telsa on the internet and learn about him and make up their own mind. Every hear of the Magnetosphere or Telluric currents. Telluric currents are extreme electrostatical lines of forc3 that occure all over the earth with the change of sunrise and sunset with conductive minerals and not conductive minerals of the earth. Fact, running water produces an electrical current. The earth is filled with all types of various natural electrical currents.

How about an ambient energy cell phone charger?

How about a mini air turbine, built into a aircushion. As you take a seat you charge you phone. Now people will have the power to talk out of their ass.

This isn't exactly brand new, anyone ever heard of crystal radios? Hello? This just sounds like a small advancement on old technology. Tesla was a genius, an upgrade on old tech is comparable to Edison.

My grandfather showed me his crystal radio he made in the 1920's. Still worked when I saw it and he made one for me to enjoy.

I used to have a neon bulb that ran on free radio waves in the 60's based on Grandpa's ideas.

In the Navy it was clear to me how well tuning a receiving antenna does to a signal.

Saying all this is really useless. The amount of true power to be had is so small, it is basically useless to most needs.

It is easier to conserve power than to try to make it.

Sounds a heck of a lot on how passive RFID tags work? Is there anything new here or am I missing something?

@BubbaGump,

Link to your sources which state Tesla harnessed electricity out of "forc3" or water, or lightning.

@ BV

"He actually proved he could harness free electricity from the environment. He wanted to develop it and give it away freely to the public. This is why his ideas were stop and not further developed or promoted. Finally, the manner of how he gather electricity is GREEN to the environment."
Where are you getting this from?
That's not even close to accurate. He did not "harness free electricity from the environment"... wtf is that even supposed to mean?
His vision was that electricity would be beamed out like radio signals (because in fact they are both just electromagnetic waves). Then people would "tune into" the electricity signal same way you tune into your favorite radio station.
His vision was for having wireless electricity. And, he demonstrated that it was completely possible to do by powering light-bulbs wirelessly, etc.
---
The reason we don't have this technology in use today (and I doubt we ever will) is because it's impossible to charge someone for it, same as it's impossible to charge someone for listening to radio broadcasts.
By the same token, it's not optimally efficient to beam electricity in this way when compared to transmitting it through a wire.
---
This article states that this energy antenna isn't Testla's vision because it has a completely different motive. Tesla wanted to beam electricity to people for them to use directly, this antenna captures "waste energy" that is the result of some other profitable endeavor.
It's the same as someone capturing and using natural gas--which was "wasted" by simply being burned off--during crude oil extraction.

I just want to say that I want to be friends. Haha, a scientific mind is a friend of mine.

I'm getting tired of the electric companies, and I'm convinced this can be done with todays technology. I've been out of the electronic field for a long time, but I'm convinced that with the advent of nano tech a component and a device can be made to pull ambient earth atmospheric electricity to power homes. What is needed to be experimented is a micro or nano device that has a whole bunch of micro or nano antenna's the hight and width and type of material is what is not known. we feed those micro or nano antennna into a charge capturing device that can then transform the the power in to the desired voltage, here in america 120 AC. Here's a few links to get people thinking about it.

look up a buisness with the stock SEFE

lightningmaster Product-Catalog

I will continue to research as time permits, let me know what you thing about the possibilities, also I've been looking for some off the shelf anti-static electronic circuit components, does that exist?



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