Satellite Technology Feature Article
Fractal Antenna Systems Unveils Deflector Shield Device
By Shamila Janakiraman, TMCnet Contributor
Fractal Antenna Systems announced that it has tested a radiation deflector shield device that is capable of diverting electromagnetic radiation.
“A deflector shield uses cloak technology not to hide an object but to pass radiation around it. There is no attempt to ‘image’. Not only is the power deflected safely to the other side, but there is virtually no change to the object caused by the radiation pressure, unlike a mirror or an absorber. There is no ‘bounce back’. This is truly a new and novel technology,” revealed Nathan Cohen, CEO of Fractal Antenna Systems
During the testing of the technology the deflector shield was designed and worn in the form of a snug vest by personnel of the company. The vest was constructed with an inner copper layer and fractal-shaped metamaterials conforming around it.
The person wearing the vest diverted virtually 90 percent of the electromagnetic power from the microwaves around him. The vest acted like a cloak diverting all the microwaves to the other side.
This in-effect helps create the ‘deflector shield’ which has been portrayed widely in science fiction movies, television, stories, and video games.
The deflector shield device is actually a variation of the invisibility cloak technology that was invented by Cohen. The invisibility cloak technology received its patent in August 2012, while the deflector shield idea is patent pending, said officials.
Fractal Antenna Systems developed the wideband, high fidelity, thin invisibility cloak technology using fractal antenna technology, added officials.
Researchers at Duke and Imperial College also announced a technology similar to the invisibility cloak technology.
However, this technology needs to be developed further as it displays several limitations according to Cohen.
“If you move half a degree in angle, it stops working. If you move half a percent in bandwidth, it stops working. Even when in exact alignment, there are variations in intensity that, according to their data, change by almost 50 percent … by attempting to disappear at one super-narrow wavelength you actually increase your profile at all others,” Cohen said.
In order to produce a ‘perfect cloak’ a huge superstructure of two different sets of mirrors is required, which should be twice as wide as the region being cloaked making the attempt unsuccessful.
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Edited by Brooke Neuman