I recently moved to a place where there are over 20 wifi networks in range at any one time. All of the usual network channels are flooded and all of my devices lose network connectivity at least once every 30 minutes. I have tried channel 1, 6, 11 and 13, as well as 14. (however, none of my devices connected to channel 14) Right now I have a Buffalo Airstation WZR-300HP with dd-wrt installed. In addition to changing channels, I have tried increasing the tx power, however that does not improve things. As it stands right now, I have a reliable wireless connection up to 10 feet away from the router. Any further than 10 feet away and I have the connection issues. My current router does not have any support for external antennas. Would a directional antenna help the situation? All the devices that use the wifi are in the same direction. Or any other thoughts on what might fix the issue?