调谐短截线弯曲方环宽带带通滤波器设计  

Wideband bandpass filter based on meander square loop using tuning stub

作　　者：李雅静[1] 冯立营[1] 刘新月[1] LI Ya-jing FENG Li-ying LIU Xin-yue(Institute of Antenna and Microwave Techniques,Tianjin University of Technology and Education, Tianjin 300222, Chin)

机构地区：[1]天津职业技术师范大学天线与微波技术研究所,天津300222

出　　处：《天津职业技术师范大学学报》2016年第3期40-42,共3页Journal of Tianjin University of Technology and Education

基　　金：天津市应用基础与前沿技术研究计划项目(14JCQNJC01100);天津职业技术师范大学科研发展基金资助项目(KJ14-36)

摘　　要：设计了一种紧凑的新型宽带双模带通滤波器。该滤波器基于一个直连馈线弯曲方环谐振器的带阻结构,加载调谐短截线构成带通滤波器,通过将所加载短截线弯曲实现滤波器的小型化。此外,方环1/4角上放置微扰并在侧面阻带位置激起的模式可以实现带通滤波器的选择性。实验结果表明:滤波器的中心频率为5.41 GHz,3 d B带宽为59.5%,插入损耗为0.16 d B,带内的反射损耗大于11 d B,符合设计要求。A dual-mode wide-band bandpass filter is proposed with a compact size. The designed filter is based on a bandstop configuration of direct-connected feed lines to meander ring resonator. The wide-band bandpass can be constructed aecording to locate the tuning stub. In order to reduce the size of the filter, located tuning stub is bent. In addition, the perturbation patch placed on the orthogonal corners of the square ring can excite the degenerate modes of the side stop band, which can realize the selectivity of handpass filter. The center frequency of the design and fabrication filter is 5.41 GHz, 3 dB bandwidth is 59.5%, insertion loss is 0.16 dB, the reflection loss is greater than 11 dB.

关 键 词：双模 调谐短截线 带通滤波器 弯曲方环谐振器 

分 类 号：TN713.5[电子电信—电路与系统]