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Active Cloak Most Broadband to Date

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An active invisibility cloak — that is, one designed to work with an external power source — could significantly broaden the device's operation bandwidth, moving its applications beyond camouflage. A team at the University of Texas at Austin led by Andrea Alù, associate professor at the Cockrell School of Engineering, proposed a design for an active cloak that draws energy from a battery, allowing objects to become undetectable to radio sensors over a greater range of frequencies. That would give the proposed active cloak a number of new applications, such as...Read full article

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