在传统的RC 串联电路稳态特性实验基础上，结合电磁学理论课程，提出包含二阶RC 滤波电路的稳态特性实验方 案设计，对比分析了一阶二阶RC 滤波电路的幅频和相频特性.本实验对学生深入理解滤波原理，掌握基尔霍夫方程组等交流 电路相关知识十分有益.

Based on the experiment of the steady state characteristic of the traditional RC series circuit and combined with the relevant contents of electromagnetic theory courses，we propose the experimental scheme design of steady state characteristics including the second order RC filter circuit. The amplitude-frequency and phase-frequency characteristics of the first order and the second order RC filters are compared and analyzed. This experiment is very helpful to students to understand the principle of filtering，and to master the knowledge of the Kirchhoff equations in the AC circuit.