Directional double BiQuad WiFi antenna 2.4GHz

If you, like me, have a garage or other place where WiFi reception is poor because you are to far away from your acces point or modem, then this directional BiQuad WiFi antenna might come handy. With this antenna you can increase the working distance of your WiFi by up to many hundreds of meters.

All you need are:
Copper electrical wire (1.5mm squared, or 1.33 diameter in millimeters)
An antenna base connector (I used a BNC here, but "N" is better)
Some metal reflector where you can solder