WiFi Antenna

tritium.co.uk: "The Tritium Flatenna is a parabolic reflector for Wireless computer networks. It can be used to increase gain of WiFi or WLAN adaptors that have an external antenna. The Flatenna is constructed from silvered board providing exceptional performance for minimal cost. Unlike conventional antenna solutions, the Flatenna does not incur additional cable and connector losses. The Flatenna is easy to assemble and install, it just slips over your existing antenna to achieve 2 - 3 times additional range."