基于1/2和1/4波长谐振器的三阶微带带通滤波器  

Compact microstrip bandpass filter based on hybrid half-and quarter-wavelength resonators

作　　者：肖飞[1] 唐小宏[1] 王玲[1] 吴涛[1] 

机构地区：[1]电子科技大学电子工程学院极高频复杂系统国防重点实验室,成都611731

出　　处：《中国科技论文在线》2011年第7期536-538,共3页

基　　金：高等学校博士学科点专项科研基金资助项目(20070614034)

摘　　要：提出一种新型的微带带通滤波器,可以看成由一个1/2波长和2个1/4波长谐振器构成,形成一个三阶耦合拓扑结构。从相应的等效电路分析和电磁仿真可以发现,在其低端阻带内存在一个传输零点。为了验证分析结果,加工和测试了一个实物滤波器,测试结果和仿真结果吻合较好。从测试结果看到,该滤波器具有尺寸小、谐波抑制较好等特点。A novel microwave bandpass filter structure is proposed.By introducing a metallic via hole,the filter structure operates as one λ/2 and two λ/4 uniform impedance resonators and consequently form a triplet coupling scheme.The equivalent circuit model is analyzed in detail,which shows that there is a transmission zero in the low stopband.In order to verify the proposition,a filter was fabricated and measured.The simulated and measured results agreed very well.This filter is charaterized by some advantages such as compact size,good harmonic suppresion and so on.

关 键 词：微带传输线 带通滤波器 三阶耦合拓扑结构 

分 类 号：TN713.5[电子电信—电路与系统]