矩形谐振腔串扰抑制方法研究

在高速数字系统中，信号完整性问题越来越突出，信号速率和设计密度的不断提高使得串扰上升为主要因素之一。先研究了基于矩形谐振腔的串扰抑制方法；然后与三倍线宽方法(3W方法)和有过孔接地的防护线方法的对比分析表明，矩形谐振腔方法对微带线间近端串扰的抑制能力不理想，但对远端串扰的抑制非常有效，在频域仿真中远端串扰幅度可提高12 dB和8 dB，在时域仿真中远端串扰峰值分别为前两种方法的18.2%和23.1%；最后进一步研究了矩形谐振腔的结构参数（间距、长度和宽度）对远端串扰的影响，发现这三个参数存在一组最优值，能最大程度地减小远端串扰。

Study of rectangular-shaped resonators method to suppress crosstalk

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.