Cloak

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These cloaks feature open centers for placing items up to 14 cm wide. They render objects invisible from side frequencies of 9.7-10.1 GHz, according to Popsci. Microwaves beam from the sides make it seem like the objects aren't there. Currently, these cloaks only hide objects from side views. To achieve full invisibility from all directions, multiple cloaks would need to be combined into a larger structure that fully encloses an object, as stated by Urzhumov. Theoretically, this technology can be used for larger devices with potential military and civilian applications.