一种多槽线扰动的双模滤波器  

A Dual-mode Filter with Multi-slot Line Perturbation

作　　者：陈薪隆 史久成 李宇寰 莫梓续 陈龙 程小军 秦然 李荣强[1] CHEN Xinlong;SHI Jiucheng;LI Yuhuan;MO Zixu;CHEN Long;CHENG Xiaojun;QIN Ran;LI Rongqiang(College of Electronic Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学电子工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2020年第3期279-282,共4页Journal of Chengdu University of Information Technology

基　　金：四川省科技厅重点研发资助项目(2019YFG0087);成都市科技项目(2019-YFYF-00152-SN);成都信息工程大学创新创业项目(201910621131)。

摘　　要：提出一种新型的双模微带滤波器.通过利用一对交叉槽线、一个方形槽和一个方形切角来实现模式分离,并结合正交馈电方式,实现良好的双模滤波器特性.仿真的滤波器中心频率为1.63 GHz,1 dB带宽为180 MHz(1.54~1.72 GHz),并能在带外产生两个传输零点.对滤波器进行了加工测试,测试结果与仿真结果基本一致.该滤波器具有结构紧凑,插入损耗小,带外抑制性好等特点.A novel dual-mode microstrip filter is proposed in this paper.By using a pair of unequal crossed slots,a square slot and a square cut,the mode separation is achieved.When combined with orthogonal feed mode,good dualmode filter characteristics can be achieved.The simulated central frequency of the filter is 1.63 GHz,the bandwidth of 1 dB is 180 MHz(1.54-1.72 GHz),and two transmission zeros(TZ)can be generated out of passband.The filter is fabricated and measured,and the measured results are basically consistent with the simulation results.The filter has the advantages of compact structure,low insertion loss and good out-of-band suppression.

关 键 词：双模滤波器 微带滤波器 带通滤波器 传输零点 带外抑制 

分 类 号：TN713[电子电信—电路与系统]