应用防护线抑制非平行微带线间串扰的研究

Research on Applying Guard Traces to Reduce Crosstalk of Non-parallel Microstrip Lines

摘要:

针对非平行微带线间的串扰问题,研究了防护线对抑制非平行微带线间串扰的效果,提出了根据非平行微带线间边缘场的主要耦合区域应用防护线的方法；理论分析与仿真结果表明,与铺设同干扰线等长的防护线相比,采用在非平行微带线间边缘场的主要耦合区域使用防护线的方法可以在起到同等抑制串扰效果的情况下,节约一部分防护线及其相应的接地过孔；该方法提高了应用防护线的效率,有助于预留出更多的可用布线空间,同时也有利于降低印制电路板生产成本。

Abstract:

Focusing on the problem of crosstalk of non-parallel microstrip lines, the effects of guard traces to reduce the crosstalk is researched. The method that using guard traces on the basis of the main fringe-field coupling area between non-parallel microstrip lines is brought forward. The theory analysis and simulation results shows that placing guard traces in the main coupling area can reduce the crosstalk in equal efficiency and save a part of guard traces and the accessory via holes, compared with placing guard traces of the same length as the aggressor line. This method can enhance the efficiency of using guard traces and help to reserve more available routing spaces, which is also beneficial to reduce production costs of printed circuit boards at the same time. 