'Invisible' to Microwaves
Washington Post, October 23, 2006, Page A08 (Auszug)
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It isn't the kind of invisibility cloak that you could put on and then disappear, but scientists at Duke University say they have taken a step in that direction with a device that deflects microwaves.
Using "metamaterials" -- created from circuit board materials and metals -- the researchers fashioned rings about five inches in diameter. The structure was able to redirect any microwaves beamed onto it, creating a flow similar to river water streaming around a smooth rock. From a microwave perspective, the circular cloak and copper cylinder placed inside "disappeared."...