Amazon.com: KuWFi Long Range Outdoor WiFi Network Adapter, High Gain 14dBi Antenna 5M Cable Wireless USB Adapter Stable Signal from Outdoor : Electronics
Amazon.com: NextG USB-Yagi Plug & Play 11N Long Range WiFi Antenna 2200mW : Electronics
What to consider when selecting a Wi-Fi antenna
EDIMAX - Accessories - Wi-Fi Outdoor Antenna - 2.4GHz 12dBi High Gain Dual Polarization Directional Antenna
2.4GHz WiFi RP-SMA 10dBi Directional Panel Antenna for WiFi Security IP Camera | eBay
Antenna 2.4GHz 4dBi Omni Directional & Directional versions: Flat Dipole