The structure of the invisible electromagnetic gateway is comprised of two perfect electric conductors (PEC) next to each other. The red area is a so-called double negative medium (DNM). While electromagnetic waves are blocked by the structure, objects can walk through undisturbed
Harnessing the unique properties of metamaterials, researchers in China have recently published a work detailing the implementation of a thin air, broadband and remotely controllable 'invisible gateway' that is able to shield all types of electromagnetic waves while letting through all other physical objects.
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