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Faraday shield material 1

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ohmrun

Electrical
Joined
Aug 1, 2001
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20
Location
US
I would like to make a Faraday shield and place it around an inductor. The purpose of the inductor is to detect ac magnetic fields. Will the conductive plastic (similar to the static shielding bags) function as a shield? If so, how would one make a connection to it? Is the resistance of the material too high for this application?
The inductor is enclose in a non-conductive material. If I use a metallic shield, due to its close proximity to the coil, the coil's electrical characteristics are upset. Therefore, that is why the conductive plastic looks desirable.
Thanks
 
To work properly a Faraday shield needs to be of highly conductive material, usually a thin metal foil. It should be wound right around the outside of the coil in the same plane as the windings, with at least one full overlapping turn. The foil must be carefully insulated so it does not create a shorted turn. The foil must then be connected to electrical neutral (ground) point for the circuit.
 
conductive plastic is the same as metal. If you're concerned that metal will change the properties of your inductor, then having conducting plastic is not different. You'll have to place the shield some distance away from your inductor.

kch
 
Not really much help, but it made me think of a big faraday cage I once saw in California at an electronics store.

"Venditori de oleum-vipera non vigere excordis populi"
 
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