多根贯通导线对屏蔽体内电路电磁干扰影响的仿真研究

Simulation of circuit electromagnetic interference by wires penetrated a shielding box

仿真研究了两根贯通导线对屏蔽体内印制电路板终端负载的影响。研究表明,贯通导线与屏蔽体外的电磁脉冲波耦合,可使传入屏蔽体内印制电路板终端负载上的电压增大很多;当双线连接时,不仅存在着空间辐射干扰波通过导线吸收传导进入电路而产生的干扰电压,而且还存在着两线间串扰电压。实验结果可知,随着频率的增加,线间串扰增大,在终端负载产生的总干扰电压,比只有通过线吸收传导进入电路产生的电压要大。这些工作对电子系统的设计和安装具有指导意义。

This article simulation studied two to link up the wire to shield in vivo printed circuit board terminator the influence. The search indicated links up the wire through and shields in vitro the electromagnetism pulse wave coupling, may enable to spread shields invivo printed circuit board terminator voltage to increase very many; When double thread connection disturbs not only has the spacer adiation disturbing wave to enter through the line absor ptionconduction produces becomes tender the voltage also to have two spacesstrings to harass the voltage, knows through the result along with thefrequency increase space string harasses increases, has the always disturbance in the terminator voltage only to have through the lineabsorption conduction enters the voltage which the electric circuit produces to have to be big. These work has the instructionsignificance to the electronic system design and the installment.