蛇形防护布线设计

高速电路中蛇形线可作为传统防护布线的替代方案，但其提出过程未曾考虑如何进行合理的设计。文中基于蛇形防护布线的外形特征影响耦合参数的原理，通过全波求解器建立蛇形防护布线模型，分析了其端接策略以及特征变化对应的远端串扰变化规律，得出了蛇形防护布线的合理设计方法。结果表明，短路策略作为最佳策略，且在信号边沿变化较快的情况下，应采用线宽小、高度高和长度短的蛇形线作为防护布线。

Serpentine Guard Trace Design Research

Serpentine guard trace is regarded as an alternative solution to traditional guard trace in high speed circuit, but process of proposing serpentine guard trace dont consider how to make the ability of crosstalk suppression better. According to the principle that serpentine guard trace basic characteristic affects coupling parameters, this paper analyses termination strategies and far end noise variation with characteristic variation via full wave solver simulation, and concludes reasonable serpentine guard trace design method. The result shows that shorting is the best termination strategy, and when signal edge changes quickly, the serpentine that are width, height and short should be used as guard trace.