How to make an active wifi tetrapak antenna - fast & cheap way ...

Step 4 Making the Enhancer ...

An empty and inside washed & dryed tetrapak is now to be a base of an Enhancer. First you have to mark a bottom center of it with a marker & draw a rectangle shape future hole for a Key tight thru future bottom insertion around that center. The hole has to be drawn with a larger side up & perpendicular to the tetrapak wider side at the bottom (92mm) ; best to use thicker/overlaid bottom tetrapak side for hole. Also the center of a hole HAS TO BE offset down for about one cm (and a mm or two maybe to the left) regarding to the center of a tetrapak bottom. This way, a hot tip of a Key internal chip 1dBi antenna will be positioned right at the center axis of a tetrapak, when inserted properly later ...

After cutting a hole with a blade cutter & checking if the Key passes smoothly but tightly thru the hole, it is the time to cut the top of a tetrapak. Use same blade cutter first to ged rid of only the the cone and then seizors to edge/smooth the sides of an opening ; get rid of any residual opening imperfections w/o shortening sides ... The sides will be now approx. 22,5cm high ...