What are the main differences between a 2.4GHz antenna and a 5GHz antennas? I have a cheap AV wireless Tx & Rx that I bough for dirt cheap it runs on 5GHz but it didn't come with antennas. Both the Tx and Rx have 3 SMA connectors for MIMO antenna setup. Could I just use any type of antennas I have a few 2GHz antennas that I have from an old modem? Also I looked on ebay and they have 5GHz high gain antenna (passive no power required) By high gain do they just mean bigger and longer so it induce more of the signal??? To me they all look the same except the high gain one which are much bigger that the duck tail ones.
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