混响室条件下传输线终端响应信号的离散算法

A Dispersed Method to Calculate the Response of Transmission Line in Reverberation Chamber

根据诺顿原理,将不同方向的电磁空间辐射等效为传输线中的分布激励源。首先分析了单独分布激励源作用在传输线上的响应信号,再将传输线进行空间离散,划分为有限数量的一维空间网格。每个一维网格对应一个分布激励源,将各分布激励源看作离散后单独的集总激励源。基于传输线理论以及电路的叠加原理,计算整条传输线上的响应信号,最后得出传输线对空间辐射电磁场的响应信号。本文给出了传输线离散的步长原则,并将得到的结果与电磁仿真软件FEKO的计算结果进行对比,两者计算结果吻合度较好,并分析了该方法产生的误差。本方法为解决混响室内电磁兼容问题有一定的指导意义。

Based on the Norton theory, make the electromagnetic radiation from the open air equals to the distributed source among the transmission lines. Firstly, the response signals along with the transmission line derived from single distributed source are analyzed. Then the investigated transmission lines are dispersed into the finite number spatial gridding. Every mesh is a distributed source in the transmission line, and the response signals among the line are calculated according to transmission line theory. Based on the superposition principle, the response to the whole electromagnetic radiation can be obtained. This paper gives the principle of transmission line discrete. Compared with the FEKO results, the two methods can get the same results and the errors of this method which are analyzed can be accepted.