抑制印制电路板上微带线间串扰是高速PCB信号完整性设计的重要内容。文中研究了在两平行微带线之间加上带有接地孔的隔离线这种方法减小串扰的有效性,讨论了在工作频带内因此发生谐振的孔间距要求,仿真得到了不同情况下的S参数、电流分布图。通过加上升时间0.1ns、周期1ns的方波脉冲激励,比较了改善前后端口的串扰的情况,可以看出串扰得到了有效地抑制。 Suppressing crosstalk between microstrip lines on a printed circuit board is an important part of the design of high-speed PCB signal integrity. In this paper, the method of reducing the crosstalk by adding the isolation line with the grounding hole between two parallel microstrip lines is discussed. The requirement of the hole spacing which resonates in the working frequency band is discussed. The simulation results show that under different conditions The S-parameter, current distribution. By adding the rising time of 0.1ns, a period of 1ns square wave pulse excitation, compared to improve the front and rear port crosstalk situation, we can see that crosstalk has been effectively suppressed.