基于开路分支线加载双模谐振器的微带带通滤波器设计  

Microstrip Bandpass Filter Based on Open Stub-loaded Dual-mode Resonator

作　　者：程昆仑[1] 李平辉[2] 赵志远[1] 

机构地区：[1]解放军理工大学通信工程学院研究生4队,江苏南京210007 [2]解放军理工大学通信工程学院卫星通信系

出　　处：《军事通信技术》2011年第2期53-56,共4页Journal of Military Communications Technology

摘　　要：文章设计了一款基于开路分支线加载双模谐振器的微带带通滤波器。通过对开路分支线加载双模谐振器的奇偶模特性及固有传输零点分析,利用调节分支线的长度可以灵活地调整谐振器的固有传输零点位置这一特性,采用了两个具有不同分支线长度的谐振器实现了一个高选择性滤波器的设计与测试,测试结果与仿真结果基本一致。所设计的滤波器中心频率为2.45 GHz,通带宽度为150 MHz,通带内插损小于1.5 dB,具有两个位于2.27 GHz和2.57 GHz的传输零点,在2.0 GHz与2.95 GHz处的衰减分别达到41 dB和29.8 dB。此外,该滤波器尺寸小巧,设计加工方便,具有一定的实用价值。A microstrip bandpass filter with two transmission zeros based on open stub-loaded dual-mode resonator is presented in this paper.By analyzing the characteristics of open stub-loaded dual-mode resonator,the proposed resonator has an inherent transmission zero.Besides,it can be easily moved by changing the length of stub-loaded line.Then,a bandpass filter is designed,fabricated and tested to validate the design concept.The resonators used here have different loaded lines that can introduce two different transmission zeros.From 2.31 GHz to 2.5 GHz,there are two transmission zeros at upper（2.57 GHz） and lower side（2.27 GHz） of the passband edge,with the attenuation better than 41 dB and 29.8 dB and the insertion loss is less than 1.5 dB in passband.

关 键 词：带通滤波器 开路分支线加载 双模谐振器 

分 类 号：TN713[电子电信—电路与系统]