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Old 11th Jan 2005, 8:38 pm   #4
Paul Stenning
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Join Date: Dec 2002
Location: Cardiff
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Default Re: Faraday cages in workshops

I remember a demonstration on an EMC training course I attended a few years ago. They had the spectrum analyser in the shielded room tuned into a radio station (probably R4 on LW), and connected to the usual radiated emissions antenna. With the door completely shut there was no reception. With the door open with less than a 1" gap, there was good reception.

This shows that you need the faraday cage to completely enclose the area. Any gaps and you are probably wasting your time bothering at all. Certainly with window-sized gaps plenty of radio signals will get in.

Could you use that glass with 1cm square wire mesh in it? I'm not sure how you could make reliable contact with the mesh, but it would look a lot tidier than a piece of chicken wire mesh pinned over the window, and would also have security advantages.
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