基于并联新型谐振器的双频滤波器  

Dual⁃band Filter Based on Parallel⁃coupled Novel Resonators

作　　者：张胜 解鑫 于梦杰 ZHANG Sheng;XIE Xin;YU Mengjie(School of Information and Control Engineering,China University of Mining and Technology,Xuzhou,Jiangsu,221116,CHN)

机构地区：[1]中国矿业大学信息与控制工程学院,江苏徐州221116

出　　处：《固体电子学研究与进展》2024年第3期229-233,共5页Research & Progress of SSE

基　　金：国家重点研发计划资助项目(2021YFC2902701)。

摘　　要：提出了一款具有可调通带和传输零点的双通带带通滤波器。该滤波器由一个T型枝节加载圆形贴片谐振器(T⁃shaped stub⁃loaded circular resonator,TSLCR)和一个多枝节加载阶跃阻抗谐振器并联耦合而成。通过奇偶模分析,调节不同枝节的长度及TSLCR圆形贴片的半径,进一步独立调节通带的中心频率和带宽。为验证设计,滤波器采用尺寸为0.55λ_(g)×0.41λ_(g)的Rogers 5880基板制作实现,其中λ_(g)为第一通带中心频率的波长。测试结果显示滤波器中心频率为2.79 GHz和4.66 GHz,带内最小插入损耗分别为1.49 dB和1.53 dB,回波损耗均优于19 dB,与仿真结果吻合较好。In this paper,a dual⁃band bandpass filter with tunable passbands and transmission ze⁃ros(TZs)was proposed.The filter was formed by a T⁃shaped stub⁃loaded circular resonator(TSL⁃CR)and a multi⁃stub loaded stepped impedance resonator in parallel coupling.Through the odd and even modes analysis,the center frequencies and bandwidths of the passbands were further adjusted in⁃dependently by tuning the electrical length of different stubs and the radius of the TSLCR.To verify the design,the filter is realized using Roger 5880 substrate with a compact size of 0.55λ_(g)×0.41λ_(g),in⁃cludingλ_(g)is the wavelength at the center frequency of the first passband.The measured results show that the center frequencies of the filter are 2.8 GHz and 4.7 GHz,the minimum insertion loss of pass⁃band are 1.49 dB and 1.53 dB,respectively,and the return loss is better than 19 dB,which is in good agreement with the simulated results.

关 键 词：可调 枝节加载谐振器 双频滤波器 

分 类 号：TN713[电子电信—电路与系统]