The cloak is made of a new kind of material called a meta screen, made up of strips of copper tape attached to a flexible poly carbonate film. The copper strips are only 66 micrometers thick and the poly carbonate film is 100 micrometers thick, and the two combined make a diagonal fishnet pattern.
It works by scattering and canceling out incoming waves, and the researchers were able to use the cloak to shield an 18 centimeter-tall cylindrical rod from microwaves. It is said to operate best at 3.7GHz, but it could also be applied to visible frequencies.
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"When the scattered fields from the cloak and the object interfere, they cancel each other out and the overall effect is transparency and invisibility at all angles of observation," said Andrea Alu, a physicist at the University of Texas at Austin. "The advantages of the mantle cloaking over existing techniques are its conformability, ease of manufacturing and improved bandwidth."