Abstract:

In high speed digital systems,signal integrity problems become more and more obvious, the increase of signal rate and design density make crosstalk be one of the major factors. Firstly,the rectangular-shaped resonators method to suppress crosstalk is studied. Secondly,this method is compared with the 3W rule method and the guard trace method with shorting via,and the comparison results illustrate that the rectangular-shaped resonators method works bad for suppressing near-end crosstalk of the coupled microstrip lines but works good for suppressing farend crosstalk of the coupled microstrip lines.The frequency-domain simulation shows that the far-end crosstalk of the rectangular-shaped resonators structure is increased by 12 dB and 8 dB respectively,the time-domain simulation shows that the peak of farend crosstalk voltage of rectangular-shaped resonators structure is improved to be 18.2% and 23.1% of that of the 3W rule method and the guard trace method with shorting via.Finally,how the structural parameters (gap between the rectangularshaped resonators, length and width) of rectangular-shaped resonators affect the far-end crosstalk of the coupled microstrip lines is studied.The simulation results demonstrate that there is a group of optimized values for the three structural parameters to suppressing the far-end crosstalk the most effectively.

Key words: crosstalk;rectangularshaped resonators;suppressing method