In order to reduce far-end crosstalk between two differential line pairs of microstrip, this paper proposes a method of reducing far end crosstalk by polarity inversion. In this way, the signal line is placed in the middle of PAD of one capacitor to achieve polarity reversal at the AC coupling capacitor of the differential line. The simulation results show that, in this way, the far end crosstalk can be reduced by 63.6%, and this method of far end crosstalk suppression has an effect on both pairs of differential lines.
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