Used satellite dishes are quite plentiful. Old DirecTV and Dish Network dishes are often found discarded or simply left behind at the point of an old installation. The parabolic shape of the satellite dish is an excellent surface for receiving the radio waves in the 2.4Ghz frequency, which is the range of Wi-Fi, or wireless Internet. Wireless Internet is increasingly found in commercial establishments, and is already in public libraries and other public access points. Building a Wi-Fi DirecTV dish antenna can help you get free Wi-Fi.
Modify an unused DirecTV satellite dish. Remove the LNB (Low Noise Block) transceiver unit first, using a Phillips screwdriver and, if necessary, a pliers to hold any nuts.
Use a USB wireless-G or wireless-N adapter from any manufacturer. Point it towards the reflective surface of the DirecTV dish. Secure it to the end of the extension arm by using self-locking nylon or plastic ties around the adapter's plastic housing and the holes in the end of the extension arm. Metal clasp ties can also be used if you prefer.
Connect a USB cable to the USB Wi-Fi adapter. In most instances, you'll also need a USB extension cable to extend the cable length to the computer. USB cables do not lose signal strength over distance.
Position the DirecTV dish properly. Its position may be fine as is. Wi-Fi signals are radio waves and radio waves are directional. Wi-Fi antennas should therefore be in a direct line-of-sight with the Wi-Fi hot-spot or source. Adjustment will be on a horizontal axis.
Connect the USB cable to a Wi-Fi enabled computer. Plug the USB cable into any open USB port.
Your operating system will sense the new USB connection. Find the strongest available Wi-Fi signal within range and click "Connect."