防护线对“单端-差分”微带线结构串扰的影响
Influence of the Guard Trace on the Crosstalk in “Single
-differential” Microstrip Lines Structure
摘要 分析了使用防护线减小“单端-差分”微带线结构串扰的方法,并运用Ansoft Designer进行仿真分析,设计了两端开路、两端端接匹配电阻、两端接地、分布多个短路过孔等4种不同类型的防护线。仿真结果表明:防护线两端开路在受扰线上产生的串扰是最大的,防护线上每隔λ/10处加入接地过孔,可以非常有效地减小线间串扰。
关键词 串扰;防护线;微带线;Ansoft Designer
Abstract The method by using the guard trace to reduce the crosstalk in "single
-differential"microstrip line was analyzed.Using the Ansoft Designer,four kinds of guard
traces were designed and simulated with open-circuit terminals, matching resistance,
grounding terminals and many grounding vias. The simulation results showed that the
guard trace with open-circuit terminals would induce worst crosstalk in victim line. On
the other hand, crosstalk was largely reduced when the guard trace was stitched to
ground at every λ/10 interval.
Keywords crosstalk; guard trace; microstrip line; Ansoft Designer
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