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

Step 3 Shoping for the best TETRAPAK ...

Now is the time to find also a proper fruit juice tetrapak (not all are suitable for best result!) in a mall and prepare it to became "the signal Enhancer". It is a thin cardboard+ALuFoil+paper+PlasticFoil "brick like shaped" & compressed together stuff, but with Flat & almost square compact bottom & a square look like "piramidal" cone on the top with an open tap !!! ... Most suitable is new undamaged like the one on a down photo. It is a 2 litre Pfanner juice enclosure with 9,2x 9cm square bottom and approx. less than 23cm high flat sides. The juice costs less than a dollar ... Tetrapaks are usualy made of layered cardboard with embedded layer of thin aluminum foil, which acts as metal housing/shield inside ... I found also a similar local juice enclosure, but a bit different measures (a bit wider & shorter also 2 litre), but it would not perform so good as that mentioned before ...