How to Attach a High-Gain Antenna to a Router (And Which One to Buy)
Amazon.com: KING KF1000 Falcon Automatic Directional WiFi Antenna with WiFiMax Router and Range Extender - White : Electronics
Amazon.com: TNP 10 dBi WiFi Antenna - 2.4 GHz Antenna Network Compact Omni Directional RP SMA Connector for PC Desktop Computer Wi-Fi Router Camera Video Surveillance : Electronics