Abstract

In this work, based on the mode decomposition technique and the far-field Green's function, an analytical solution of the radiated electric field from coupled traces is formulated by taking both the common and differential-mode currents into consideration. The analytical solution of the radiated electric field is further used to predict the EMI from differential microstrip pairs with time-domain input signals having different slew rates and different amount of skew. From the results, it is possible to quantify the relative impact of these two sources of imbalance on EMI.

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