一种恒定带宽可调滤波器的设计  

Design of a Tunable Filter with Constant Bandwidth

作　　者：贾建蕊[1] 马延爽[1] 张英[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]石家庄陆军指挥学院,河北石家庄050084

出　　处：《无线电工程》2015年第9期45-48,共4页Radio Engineering

基　　金：国家科技重大专项基金资助(2014ZX03006-003);自然科学基金资助项目(61071104)

摘　　要：针对可调滤波器设计中存在的问题,分析了可调滤波器的设计及变频原理,提出了一种全新的设计方法——耦合带宽法。详细论述了应用Designer进行原理仿真、以耦合带宽法为基础应用三维电磁场仿真软件HFSS整体验证的过程;用HFSS仿真了一个C波段λ/2同轴腔可调带通滤波器,给出了9个频点的幅频特性。仿真结果表明,在整个调谐频段内该滤波器的带宽几乎不变,驻波、抑制度和插入损耗等指标稳定良好。Based on the problems in tunable filter design, the design and frequency conversion theory of tunable filter are ana- lyzed, and a novel design based on coupled bandwidth is presented.The design process is discussed in detail,including the simulation by Designer and the overall verification by HFSS based on coupled bandwidth.A λ/2 coaxial tunable filter is simulated by HFSS and the amplitude-frequency characteristics of the tunable band-pass filter in C-band are presented, which show that the bandwidth in the whole tunable band is nearly constant,and the VSWR,suppression and insertion loss are consistent with theoretical calculation.

关 键 词：恒定带宽 可调滤波器 变频 耦合带宽 

分 类 号：TN713[电子电信—电路与系统]