北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (3): 96-99.doi: 10.13190/jbupt.200903.96.zhangd

• 研究报告 • 上一篇    下一篇

印刷电路板微带线的电磁辐射机理和计算方法

张丹 刘元安   

  1. 北京邮电大学无线电技术与电磁兼容实验室 北京邮电大学
  • 收稿日期:2008-07-03 修回日期:2009-04-14 出版日期:2009-06-28 发布日期:2009-06-28
  • 通讯作者: 张丹

Investigation on Radiation from Microstrip on Printed Circuit Board

Yuan-An Liu   

  • Received:2008-07-03 Revised:2009-04-14 Online:2009-06-28 Published:2009-06-28

摘要:

为了提高辐射问题的计算效率,推导了微带线结构的含有闭式空域格林函数的矩量法数值计算公式。在损耗基底介质的情况下,研究了微带信号线的辐射干扰以及单屏蔽线对辐射干扰的抑制作用。仿真结果显示了存在屏蔽线的微带线结构所产生的辐射功率远小于无屏蔽线的辐射功率,表明了单屏蔽线对电磁辐射干扰有很好的抑制效应。因此,在数字电路的电磁兼容设计中,在强信号线邻近处放置一条屏蔽线能够有效地降低辐射干扰。

关键词: 辐射, 矩量法(MOM), 微带线, 印刷电路板(PCB)

Abstract:

In order to increase computing speed, MOM formulations including closed-form spatial domain Green’s functions are derived for geometry of microstrip. Based on loss substrate, radiation emission and interference suppression for signal lines are investigated. The results show that radiated power from a signal line with a shielding line is much less than that from a signal line without a shielding line. Therefore, in the EMC design of digital circuits, adding a shielding line to a signal line can effectively decrease spurious radiation.

Key words: radiation, method of moments (MOM), microstrip, printed circuit board (PCB)