I hope it also at least recommends that the grounding is at the sending
end, so that the cable capacitance is charged from the low-impedance
source. I guess that, e.g. in the auto environment, the risk of large
shield currents is too great to allow routine grounding at both ends.
But I suppose that grounding via a capacitor at the receiving end is not
banned. If possible, this capacitor should be of the lowest possible
inductance, which is not difficult with SMD, and if several capacitors
are disposed radially around the end of the shield and grounded at their
outer ends on a metal ring, the grounding should be good up to at least
1 GHz.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-06-12 22:41, Ken Javor wrote:
Automotive EMC question The CAN bus spec says that shield(s) are to be
grounded at one end only. How does this work vs. meeting stringent rf
RE and RS requirements at frequencies where cables are electrically long?
Thank you,
Ken Javor
Phone: (256) 650-5261
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