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Common-mode currents generated by circuits on a PCB-measurements and transmission-line calculations

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3 Author(s)
van Horck, F.B.M. ; Philips Components, Eindhoven, Netherlands ; van Deursen, A.P.J. ; van der Laan, P.C.T.

Common-mode (CM) currents on cables attached to printed circuit boards of various complexity have been measured. The boards have a continuous ground plane, with tracks on both sides. The experimental results are compared to calculations with a transmission-line (TL) model. Expressions for the coupling parameters in the TL model have been derived with conformal transformations and the method of moments. Measurements up to 1 GHz agree with the TL model, showing that this model can be used as a tool for an early EMC analysis during the lay-out and routing of a board

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Electromagnetic Compatibility, IEEE Transactions on  (Volume:43 ,  Issue: 4 )