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October 10th 07, 09:09 PM posted to rec.radio.shortwave

matt weber matt weber is offline

matt weber is offline

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shielding

On Tue, 09 Oct 2007 12:28:06 -0700, wrote:

On Oct 9, 12:18 pm, RHF wrote:
On Oct 9, 10:00 am, billy wrote:

What material can be used for shield against potentially dangerous
levels of radio waves. Lets say outside my bedroom is a radio
communication device. What material could stop the waves from
entering. Cement? Lead? How thick?

Aluminium Siding -and- Aluminium Screened Windows

I have a MSEE, but E&M is not my specialty. However, since aluminum is
not a ferous material, I believe the H wave will penetrate it. RF
shielding paint is generally nickle for that reason. I don't recall if
"mu metal" is ferous or not.
If the aluminum is more than skin depth thick, I don't think you will
get much H-wave penetration. The moving field induces a current in the
conductor that will cancel it.

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