具有多传输极点的枝节加载双通带宽带滤波器  

Compact Dual-Wideband Bandpass Filter with Multiple Transmission Poles Based on Several Stubs

作　　者：肖寅川 李国辉[1] 蒋琦天 张静[1] 谢世濠 

机构地区：[1]上海大学通信与信息工程学院,上海200444

出　　处：《工业控制计算机》2023年第8期43-44,46,共3页Industrial Control Computer

摘　　要：为了实现频谱资源的最大化使用以及保证现代射频系统的高速通信,多通带的射频器件以及宽带系统成为未来的无线通信发展趋势。设计了一个基于平面微带线的双通带宽带滤波器,该滤波器由七对特征阻抗各不相同的微带线组成,其中包含多对开路、短路枝节。通过奇偶模等效方法对其进行零极点分析后,该滤波器具有8个传输极点,均匀地分布在两个通带内,测量的两个通带相对带宽分别为102%和20%,两个通带的中心频率频比达到了4.7。此外,首个通带内的回波损耗大于20 dB,第二个通带内的回波损耗则优于15 dB,实验测量结果与仿真结果吻合良好。In order to maximize the use of spectrum resources and ensure the high-speed communication of modern radio frequency systems,multi-passband radio frequency devices and broadband systems become the future trend of wireless communication.A dual-wideband filter based on planar microstrip lines is designed in this paper.The filter consists of seven pairs of microstrip lines with different characteristic impedances,including several pairs of open circuit and short circuit stubs.Analyzed by odd-even mode method,the filter has 8 transmission poles evenly distributed in two passbands.The fractional bandwidth of the two passbands measured are 102%and 20%respectively.The center frequency ratio of the two passbands reaches 4.7.In addition,the return loss in the first passband is greater than 20 dB,and the return loss in the second passband is better than 15 dB.The experimental measurement results are in good agreement with the simulation results.

关 键 词：滤波器 双通带 宽带 极点 

分 类 号：TN713[电子电信—电路与系统]