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USB adapters with 1cm antennas

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We have a couple of these USB adapters in our testing collection, with tiny 1cm antennas. Surprisingly, they give a fairly good range for indoors use, especially taking into account their low price ($10-$15). They even traverse an armored concrete wall into the adjacent room.

Recently we've came upon a Quora question with some explanation on how they work "at all". Enjoy the reading, it's quite interesting.

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