Off-grid cell net­work

Popular Science - - BEST OF WHAT’S NEW 2017 -

Smart­phones are pow­er­ful de­vices but need one pesky thing: in­fra­struc­ture. This candy-bar-size gizmo lib­er­ates your hand­set from its de­pen­dency on cell tow­ers. Blue­tooth­pair one with your phone, and then beam mes­sages over UHF ra­dio waves to friends miles away who are also car­ry­ing the gad­get. Be­cause each an­tenna acts as a node in a mesh net­work, your range ex­pands with each goTenna in the vicin­ity.

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