One thought, most of our EMI problems have been conducted immunity, where the cables have acted as antennas, and in one case we had a cable made that was 1/4 wavelength of a clock signal, that device didn't pass EMC testing for a while, while we scratched our heads to the problem.
I'm not so convinced by the eddy current theories against metal casings, but I can see how having a metal case that is earthed to a point that that has a lot of noise relative to the more sensitive circuitry is going to capacitively couple into the circuits. This is quite typical of many designs where the case grounding has the psu rectifier noise in series.
At low UHF, VHF and lower, emc problems are dominated by cable conduction.
At low UHF, VHF and lower, emc problems are dominated by cable conduction.
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