This is a double biquad wifi antenna. Since I am not that good with soldering copper piping and plate, I designed this 3d printed version!I am not sure about the impedance matching of this antenna, I am not an expert, however, it works pretty well, I made a quick test tonight and was able to see about 20 wifi Access points just by pointing the dish in one general direction without taking care of adjusting it correctly..Transmitting and Receiving works pretty well also, tested with aireplay-ng orienting the antenna correctly would give me 100% transmit packets on seemingly far APs..Since I've just made the antenna, I didn't have much time to test it, but I'm convinced it's very effective!You can follow the instructions of this site for detailled build of a double biquad, it will help understand the wiring and the assembly procedure: http://martybugs.net/wireless/biquad/double.cgiMaterials:Instructions: