I think it improved my signal. I can not say. I went from 3x3 dBi antennas to these 3x9 dBi antennas. They're about three times longer than the old ones, and this router now has the same signal strength as my modem router, but the modem router doesn't have external antennas. A little disappointed as I don't think the move from 9dBi total to 27dBi total hasn't tripled or even doubled my signal.
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