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bttd
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I'm working on a wifi device testing box and made the first prototype of the Faraday cage. I need holes because of cooling. For this reason, the box has 3mm diameter holes on the top. The box made from steel, and have 2mm wall thickness.
The wavelength around 12,5 cm for 2,4 GHz and 6 cm for 5Ghz. The 3mm holes need to be small enough to block the signal (smaller than 1/10 of the wavelength). But the cage does not block wifi, but even GSM signals. The signal strength going lower but not disappear.
Is there anything I'm missing? I also tried to gound the box, but it won't help. The 2mm thick steel not enough?
The wavelength around 12,5 cm for 2,4 GHz and 6 cm for 5Ghz. The 3mm holes need to be small enough to block the signal (smaller than 1/10 of the wavelength). But the cage does not block wifi, but even GSM signals. The signal strength going lower but not disappear.
Is there anything I'm missing? I also tried to gound the box, but it won't help. The 2mm thick steel not enough?