摘要
电路板信号间的远端串扰对信号的完整性具有较大的影响。为研究降低远端串扰的方法,本文利用Ansoft HFSS软件对线间串扰进行电磁仿真研究。研究表明通过添加防护线、覆盖介质层等措施可以降低远端串扰的影响。在一定频率范围内增加RSR结构中金属贴片的长度和数量,使金属贴片厚度接近微带线厚度等措施,会具有更好的效果;选择具有较高相对介电常数的覆盖介质层材料及增大介质层的厚度也可以降低远端串扰的影响。
Far end crosstalk on printed circuit boards has a large impact on the signal integrity. In order to study the method of suppressing far-end crosstalk, electromagnetic simulation of the far-end crosstalk between microstrip lines is studied by using Ansoft HFSS. The results show that the far-end crosstalk is obviously reduced with guard lines between microstrip lines and media layer on the top of mierostrip lines. In the certain frequency range, it is an effective way to suppress far-end crosstalk in large scale by increasing the length and number of metallic sheets; the method of selecting large relative permittivity and thickness of media layer can also reduce the effect of far end crosstalk.
出处
《电子设计工程》
2014年第10期137-140,共4页
Electronic Design Engineering
基金
国家开放大学规划项目(Q0604F-Q)
辽宁省现代远程教育学会规划项目(2013XH01-23)
关键词
远端串扰
微带线
电磁仿
RSR结构
far end crosstalk
microstrip line
electromagnetic simulation
RSR structure
