基于双枝节“U”型谐振器的双频段微带带通滤波器  

Dual-band Microstrip Bandpass Filter Based on Dual-stub Resonator

作　　者：徐朕[1] 徐晓英[1] 

机构地区：[1]湖北省射频微波应用工程技术研究中心,武汉理工大学,武汉430070

出　　处：《固体电子学研究与进展》2017年第4期261-265,共5页Research & Progress of SSE

摘　　要：利用一种新型的双枝节"U"型谐振器结构,设计了一款双通带微带带通滤波器。该谐振器是在"U"型谐振器的中间和侧臂上各引入了一个枝节得到的,调节侧臂上枝节的特性导纳能够在不改变一次谐波与基波频率比f_1/f_0的情况下自由改变二次谐波与基波频率比f_2/f_0的值,该特性能在实现指定的双通带的同时获得较好的带外抑制性能。对中心频率分别为0.9GHz和1.36GHz,相对带宽分别为12%和4%的双频段的微带带通滤波器进行了仿真和测试,测试结果与仿真结果吻合良好,证实了该双枝节谐振器的有效性。A dual-band microstrip bandpass filter based on dual-stub U-shaped resonator was presented. The resonator was designed by adding a stub into the middle and one side arm of the U-shaped resonator respectively. By changing the characteristic admittance of the stub at side arm, the resonant frequency ratio f2/f0 could he adjusted freely without changing the resonant frequency ratio f1/f0. This characteristic can be used to obtain specified dual band with good stophand rejection. A dual-band bandpass filter based on the resonators with center frequencies of 0.9 and 1.36 GHz, FBWs of 12% and 4% was simulated and fabricated. The measured results a- greed well with the simulation data, which showed the availability of the resonator.

关 键 词：双通带 双枝节谐振器 带外抑制 

分 类 号：TN713.5[电子电信—电路与系统]