基于方形开环的双模滤波器设计  

Dual-Mode bandpass filter with open-loop

作　　者：景冻冻[1] 韩希军[2] 李国辉[1] 

机构地区：[1]特种光纤与光接入网省部共建重点实验室上海大学,上海200072 [2]潍坊科技学院,潍坊262700

出　　处：《电子测量技术》2010年第5期32-34,共3页Electronic Measurement Technology

基　　金：上海市重点学科和上海市重点实验室项目资助(S30108;08DZ2231100)

摘　　要：在传统方形开环谐振器的基础上,设计了一种新型的双模微带滤波器,该滤波器包含两个方形开环谐振器,在每个传统谐振器内部添加微带支路结构,通过微扰来实现频响特性的改善,由仿真结果可以看出,该设计的带内特性良好,带内波纹小于0.3dB,通带边沿均插入了传输零点,且传输零点处的S21<40dB,截止边沿陡峭,实现了6%的相对带宽,整个滤波器的尺寸大小约为30mm×20mm,改进后的结构与传统结构相比降低了0.5GHz的中心频率,相对减小了16%的面积,进一步实现了小型化。In this paper,a new dual-mode microstrip filter based on the traditional square ring resonator is designed.The new filter consists of two square ring resonators.Each resonator has a traditional in the branch structure.The perturbation generated by resonator can greatly improve frequency response of the system.The simulation results show that the filter has a good band characteristics,band ripple is less than 0.3 dB,transmission zeros are inserted into the pass-band edge and where S21 40 dB,cut-off edge of the steep,achieve 6% relative bandwidth.The size of filter is about 30 mm×20 mm.The center frequency of improved structure is 0.5 GHz lower than filter with traditional structure,and the area of improved filter is reduced by 16% compared to the traditional structure.Further to realize the miniaturization.

关 键 词：传输零点 微带 开环 

分 类 号：TN713[电子电信—电路与系统]