WiFi Antenna – Understanding 2.4 GHz and 5 GHz WiFi Antennas


My USB WiFi adapter has two antenna connectors, I have a lack of knowledge of these connectors, few questinos:

  • how to check which connector is 2.4/5 GHz or both are 2.4/5 GHz at the same time?
  • comes with these two antena, as I see its a 2.4 GHz antenna, then why vendor gives me two 2.4 GHz antennas without 5 GHz antenna?
  • I could connect to one connector 2.4 GHz antenna and to the second connector 5 GHz antenna?

Best Answer

The USB Wifi adapter you mentioned has two antennas. Each of these operates on both 2.4 and 5GHz bands per the specification-"2.4G/5GHz Dual-Band 5dBi dipole antenna".

The reason you have 2 antennas is to enable the MIMO/beamforming/multiple concurrent transmissions capabilities as defined by 802.11ac