Faraday screen

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Vaibhav Birit said:
What exactly is a Faraday screen. I encountered this term in the context of a coaxial cable.
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It's basically a metal screen round a circuit, it doesn't have to be solid, a mesh (of the right size) is just as effective.

Google provides lots of info (as usual!), have a look at a demonstration here .
 
I once remembered this simple experiment that my prof did. He placed a transistor radio into a meshed cage and reception dropped to nothing almost immediately. Stick a metal rod through the mesh (not touching the radio or mesh) and reception returned. A simple yet interesting experiment on waveguide theory.
 
A simple "demonstratin kit" the microwawe oven: the mesh on the door have about 2mm diameter holes, and for 2,4GHz appeared as coherent metal shield.
 
Sebi said:
A simple "demonstratin kit" the microwawe oven: the mesh on the door have about 2mm diameter holes, and for 2,4GHz appeared as coherent metal shield.
Click to expand...

Even a fairly large hole (3-4cm's) 'ripped' through the mesh doesn't leak very much! 8)
 
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