Dear Group,
I have a task assigned and I don't know where to begin. I'll be
as descriptive as I can and look forward to hearing your
comments/suggestions.
Within our company it has been suggested that the fiberglass
body that acts as a structural support (a sort of canopy) be impregnated
with copper mesh to give it shielding properties. It will be used to
provide extended shielding of some electronics inside. My question is with
regards to determining the following:
1) the shielding effectiveness (near and far field)
2) Impedance over frequency (up to 500Mhz) (I've seen several plots of
impedance over frequency for "grounding straps" and "system reference
potential planes", does anyone know how these plots are formed, measurement
or calculation?)
What has been put on my desk is several pieces of fiber glass about
1ftx1ft. One has the wire mesh impregnated, one has a conductive coating,
the other has, i think a mixture of the two, (by the way the overall
structure of the final product will be irregular and fairly large) Can any
one suggest to me a quick test jig that I can setup to help determine the
above two points (using the 1ftx1ft fiber glass and required measurement
equipment). This would help determine which of the three fiberglass pieces
is best.
I'm not sure what this question might sound like to the rest of you.
I guess I'll figure it out from the responses :)
Thanx in Advance
Best Regards,Antonio L. Cinquino CAE Electronics Ltd. Electrical System Designer Phone : (514) 341-2000 (ext. 4303) Fax : (514) 340-5552 Pager : (514) 897-5166 Email : <mailto:[email protected]> [email protected]
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