Hi, I've found lots on the 'net about building Faraday cages, but most of these are a couple of years old and targeted at lower frequencies up to around around the 2.4GHz range. I'm looking at making a Faraday cage for a room, to shield against a recent phone tower upgrade with transmissions now in the 19GHz range. (I've seen some other towers, fortunately not near me, recently approved for transmissions at 38GHz.) From what I've read so far, I'd need about 20 layers of heavy duty alfoil to come close to getting effective shielding, or wire with holes less than 7.5mm wide, which is going to be pretty tricky. Just wondering if anyone's tackled this problem before and, if so, how?