基于平行耦合线和开路枝节的小型带通滤波器设计  

Compact Parallel Coupled Line Band-Pass Filter Design with Open Stub

作　　者：喇东升[1,2] 郭经纬[3] 刘妍[4] 贾守卿[1] 马雪莲[1] 

机构地区：[1]东北大学计算机科学与工程学院,沈阳110819 [2]东南大学毫米波国家重点实验室,南京210096 [3]燕山大学信息科学与工程学院,河北秦皇岛066004 [4]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《北京邮电大学学报》2017年第2期93-96,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61501100;61601105);河北省高等学校科学技术研究项目(QN20132014;QN2015141);中央高校基本科研业务费项目(N142303003);毫米波国家重点实验室开放课题(K201705);河北省自然科学基金项目(F2015203373)

摘　　要：为了解决耦合线滤波器谐波抑制问题,提出了一种新的结构简单的平行耦合线带通滤波器.该滤波器由平行耦合线和开路枝节组成.首先基于耦合线带通滤波器的等效电路图,通过奇偶模理论得到设计方程,并设计了带通滤波器;分析了滤波器特性与电参数之间的关系;通过仿真优化得到了滤波器的物理尺寸;制备并测试了滤波器的S参数,仿真结果和测试结果基本一致.该滤波器具有结构简单、面积小等优点,并通过引入传输零点实现了较宽的阻带抑制和较好的选择性.In order to solve harmonic suppression, a parallel coupled line band-pass filter with simple structure was proposed.The filter consists of parallel coupled lines and open stubs.Filters equation was firstly obtained via odd-even mode analytical method, which is based on the equivalent circuit of the proposed coupled line band-pass filter, and a compact band-pass filter was designed.Secondly, the relationship between filters resonant characteristics and its electrical parameters was analyzed.And then, the geometric parameters of the proposed band-pass filter was obtained and optimized.Finally, the proposed band-pass filter and measured its S parameters was fabricated, which were basically consistent with simulation.It is founded that the filter designed has the advantages of simple structure, small size, etc.The proposed band-pass filter also has a wide stop band rejection and better selectivity through the introduction of transmission zeros.

关 键 词：带通滤波器 平行耦合线 开路枝节 奇偶模理论 半波长 

分 类 号：TN713.5[电子电信—电路与系统]