Crosstalk suppression scheme between inclined differential vias
To address the crosstalk issue between differential vias on multilayer boards at high frequencies,two differential via schemes with inclined arrangement were proposed.In the proposed schemes,the differential vias were shifted based on the parallel differential via arrangements,and the coupling between adjacent differential channels was reduced by inclined arrangement.Simulation and analysis were performed in the frequency domain of 0.1～30 GHz.Results demonstrate that differential vias with inclined arrangement exhibit significantly lower crosstalk compared with differential vias with parallel arrangement.Compared with parallel arrangement,the differential far-end crosstalk and differential near-end crosstalk are reduced by 21.3 dB and 6.9 dB for single-pair inclined vias at the maximum point of crosstalk suppression,while the double-pair inclined vias exhibit reductions of 10.5 dB in differential far-end crosstalk and 15.5 dB in differential near-end crosstalk.
万方数据
维普
