模拟滤波器群时延及驻波比的优化设计  

Optimization Design of Analog Filter′s Group-delay and VSWR

作　　者：李鹏[1] 张丹[1] 马红梅[1] 

机构地区：[1]华北科技学院电信系,北京101601

出　　处：《电讯技术》2012年第6期979-983,共5页Telecommunication Engineering

基　　金：河北省教育厅科学研究基金资助项目(Z2006439);华北科技学院基本科研基金项目(DX1207B)~~

摘　　要：针对网络综合方法不能直接对滤波器的群时延和驻波比同时设计的问题,提出了一种滤波器的幅频特性、群时延和驻波比特性同时优化的设计方法,即在网络综合法设计滤波电路的基础上,利用无约束优化方法对群时延和驻波比同时优化,降低通带内群时延波动和驻波比的最大值。从仿真结果可以看出,优化后滤波器幅频特性接近算术对称,群时延波动最大值17.337 ns,驻波比最大值仅为1.455 0。For the problem that an analog filter＇s group- delay and voltage standing- wave ratio （VSWR） can not be designed simultaneously by the network synthesis method, an optimal design method for amplitude-fre- quency characteristic, group-delay and VSWR is proposed. Based on design of filter circuit by network synthesis method, the unconstrained optimization method is used to opitmize the group - delay and the VSWR simultane- ously to reduce the group - delay ripple and the max value of VSWR. The simulation results show that the pro- posed method can get arithmetic symmetrical amplitude - frequency, the max value of VSWR is only 1.455 0 and the group - delay ripple is 17. 337 ns in pass - band.

关 键 词：模拟滤波器 幅频特性 群时延 驻波比 算术对称 优化设计 

分 类 号：TN713[电子电信—电路与系统]