一种改进的超短波带通滤波器设计方法

摘要

针对传统滤波器设计方法在超短波带通滤波器设计过程中出现的通带偏移问题,将基于有限元法的电磁场仿真软件与基于矩量法的电路仿真软件结合起来,提出了一种改进的滤波器设计方法;并对工作于50~110 MHz的带通滤波器进行了设计.将仿真设计结果与实验结果进行了对比,验证了该改进的滤波器设计方法很好地解决了通带偏移的问题.%When the traditional filter design method is used for the design of VHF band-pass filter, it may appear the problem of band offset.Combined electromagnetic field simulation software based on finite element method (FEM) with circuit simulation software based on moment method (MOM), a modified filter design method is proposed.Then this modified method is used for the design of a band-pass filter working at 50~110 MHz.It is verified that this modified filter design method should well solve the problem of band offset by comparing with measurement.