摘要
针对电磁干扰(EMI)滤波器在噪声源、负载阻抗失配情况下的工作性能受较大影响的问题,提出了一种带有阻抗失配网络的EMI滤波器设计方法,利用合适的阻抗网络来减弱或消除不利影响.通过选取合适的失配网络参数使得噪声源与滤波器的输入阻抗和负载阻抗与滤波器的输出阻抗均满足一定的比例关系,且利用不同阻抗比例关系产生不同的反射损耗这一特性对滤波器端口阻抗失配网络进行设计,使得滤波器在原有插入损耗的基础上增加其反射损耗,达到改善滤波器工作性能的目的.
Affected by the impedance of noise source and load,the performance of electromagnetic interference（ EMI） filter is often poor. In order to solve this problem,the design method of impedance mismatching network of EMI filter is proposed. According to the value of the impedance of noise source and load,the impedance mismatching network is defined into L-type network and C-type network. By selecting the appropriate parameters of the impedance mismatching network,the noise source impedance and the input impedance of the EMI filter some proportions,and the load impedance and the output impedance of the EMI filter also meet some proportions. Using the characteristics that different impedance proportions have different values of reflection loss,the impedance mismatching network of EMI filter is achieved. Except for the insertion loss,the reflection loss is also supplied by the EMI filter network and the performance of the EMI filter is further improved.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2015年第5期100-104,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
国家自然科学基金资助项目(51177071)
南京航空航天大学研究生创新基地(实验室)开放基金资助(kfjj201412)
中央高校基本科研业务费专项资金资助
