Neven, There are quite a number of books addressing the shielding effectiveness analysis. Personally, I will recommend two of them: 1. White: EMC Handbook, Volume 3: Shielding 2. Ott: Noise Reduction Techniques in Electronic Systems, Chapter 6: Shielding Hope this helps Leslie Neven Pischl <[email protected]> wrote: I would appreciate if anyone could let me know if there are any references (books, application notes, anythig ..) that deal with shielding efectivness in cases when a source is close to an (electrically small) opening in a shield (enclosure). In such a situation, the field will penetrate through the hole and leak even if the size is much smaller than the wavelength. I am particularly interested in situation when high-frequency source, such as a PCB edge or a component operating at (say) 1 GHz and above is in proximity of the venting holes, "small" gaps in the chassis etc. All references that I have deal with uniform plane wave propagating incident to a metal plane with a slot or hole, in which case it is enought o have electrically small size of the opening (e.g. lambda/10) to efficiently block any field propagation through the barrier. I can't find any useful reference that deals in any analytical way with the situation I am interst! ed in. I believe I might get some answers using some of the simulation programs, but at the moment I am more intersted in the analysis of the problem than in simulating it. Thank you, Neven Pischluite
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