I have the RT-N66U and it is working well, except I am having trouble getting a good signal on the 2.4ghz band (probably due to interference). After trying various router settings, router placement and different channels without success, I have decided to try using a high gain replacement antenna. I have found a few dual band antennas, including the Asus WL-ANT157 and the Asus WL-ANT168, but I can't tell if they are fully compatible with the RT-N66U. Am I safe in assuming that they will fully work with 802.11a/b/g/n as long as they transmit at the 2.4 GHz and 5 GHz frequencies, or do I need to check any other specs. One reason I am confused is that some dual band antennas I found online say they work with 802.11a/b/g but do not mention 802.11n, which suggests they will not transmit 802.11n signals. Any advice would be appreciated.