FreeLists / si-list / [SI-LIST] Re: shielding effectiveness

["Douglas C. Smith" <doug@xxxxxxxxxx>]

Hi Vijay,

Take a look at the article: www.dsmith.org/pdf/emc96.pdf for a way of
measuring the magnetic field shielding effectiveness of a material. For
shields within electronic equipment, especially small equipment,
magnetic field shielding effectiveness is oftem more meaningful than
electric field or plane wave shielding effectiveness. I have found many
materials rated at 100 dB to plane waves check out at about 10 dB to a
(perpendicular) magnetic field. Such a field often illuminates shields
in equipment.

Doug

"Wani, Vijay (V)" wrote:
> 
> hello:
> 
> How can i differentiate electric field shielding effectiveness with magnetic
> field shielding effectiveness of a material? is there any test standard /
> non standard?
> 
> i appreciate any direction. thank you in advance.
> 
> vijay wani
> Dow Chemical
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