You are way way off on your faraday cage gap sizing. In order to block EM fields with frequencies of 10 GHz and lower, the hole size of the Faraday cage should

You are way way off on your faraday cage gap sizing. In order to block EM fields with frequencies of 10 GHz and lower, the hole size of the Faraday cage should be smaller than 3 mm. You want the hole to be less than 1/10th the wavelength of the frequency you’re trying to block