In addition to being only 2.4 GHz, their camera designs only use one spatial stream (which is why you may have noticed the connection with the camera tops out at 72.2 Mbps, that is the maximum rate for a single spatial stream on 802.11n). So, the camera is forced to transmit and receive on a single spatial stream. If you try to run the WiFi camera at 1080P, it just can't handle it. Also, the antennas they include really aren't great, they are only 2 dBi. Also, just as a point, the connectors on the cameras are RP-SMA, not SMA. If you try to use an SMA antenna, it will literally never work.