400 MHz超窄带微波滤波器设计  

Design of 400 MHz ultra-narrowband microwave filter

作　　者：刘子锐 陈钟荣[1] LIU Zirui;CHEN Zhongrong(School of Atmospheric Physics,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学大气物理学院,江苏南京210044

出　　处：《现代电子技术》2021年第11期19-22,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(41075025):宽带复杂雷达发射信号在大气边界层精细结构探测中的应用研究。

摘　　要：针对卫星导航探空接收机射频前端的设计中杂波抑制需求,使用顶部电容型微波谐振结构设计一款相对带宽为2.5%,中心频率为403 MHz的超窄带滤波器,并得出封装电感元件与腔体、发夹型微带线滤波器结构不适用于此波段超窄带滤波器设计的结论。设计中只使用了封装电容与微带线,具有结构紧凑、参数稳定、低插损与超窄带的特点。结果表明,顶部电容型微波谐振滤波器在此波段能够良好地实现超窄带滤波,其性能明显优于腔体滤波器与发夹型微带线滤波器。In view of the need for clutter suppression in the design of the radio frequency(RF)front-end of the satellite navigation sounding receiver,an ultra-narrowband filter with a relative bandwidth of 2.5%and a center frequency of 403 MHz was designed according to the microwave resonance structure with capacitor type top.A conclusion that the microstrip filters with the structure of packaged inductive component,the structure of cavity and the structure of hairpin type are not suitable for the design of ultra-narrowband filter working in the above-mentioned waveband is obtained.In the proposed design,only packaged capacitors and microstrip lines are used,so the design has the characteristics of compact structure,stable parameters,low insertion loss and ultra-narrowband.The simulation results show that the microwave resonator filter with capacitor type top can achieve ultra-narrowband filtering well in this band,and its performance is significantly better than those of the cavity filter and the hairpin type microstrip line filter.

关 键 词：超窄带滤波器 参数选择 滤波器设计 线性优化 电磁仿真 误差分析 

分 类 号：TN713-34[电子电信—电路与系统]