新型微带交叉耦合环微波带通滤波器  

Novel Microwave Bandpass Filter with Microtrip Cross-Coupled Square Open-Loop Resonators

作　　者：胡皓全[1] 曹纪纲[1] 

机构地区：[1]电子科技大学电子工程学院,成都610054

出　　处：《电子科技大学学报》2008年第6期875-878,共4页Journal of University of Electronic Science and Technology of China

基　　金：部级基金

摘　　要：设计了一种新型交叉耦合结构带通滤波器,采用了凹槽环形式谐振器,使得获得同样的耦合系数新型结构相邻两环间的距离明显减小,因此这种滤波器具有小型化的优点。通过在传输函数中引入了两个传输零点,使得此种结构的滤波器具有更高的品质因数。利用电磁软件CST的分析给出了此种结构的耦合系数的结构参数,设计了一个工作在X波段的该结构带通滤波器,尺寸为5.9mm×5.9mm,带外抑制为25dB以上,带内插损为3.2dB,最后的实验结果与仿真曲线一致性较好。A novel cross-coupled band pass filter （BPF）based on the flute resonator is proposed. Due to the adoption of the same new configuration of coupling coefficient, the distance between the two loops is clearly shortened, which offers BPF an advantage of miniaturization. The configuration is characterized by a higher Q factor by introducing two transmission zeros in the transfer-function. The structural parameter of the coupling coefficient of this configuration is achieved through the analysis of electromagnetic software CST. Thereby, the band pass filter used in X waveband is designed with a dimension of 5.9 mm×5.9 mm, in-passband insertion loss （IL） of 3.2 dR and out-passhand IL of 25 dB. The result of the experiment agrees well with simulation.

关 键 词：带通滤波器 交叉耦合 微波滤波器 开环谐振器 X波段 

分 类 号：TN713.3[电子电信—电路与系统]