基于非谐振节点的波导滤波器设计  

The design of waveguide filter based on nonresonating nodes

作　　者：赵白 

机构地区：[1]河南水利与环境职业学院基础部,河南郑州450008

出　　处：《东北师大学报（自然科学版）》2017年第4期54-58,共5页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61131002)

摘　　要：阐述了基于非谐振节点的广义耦合系数的提取、外部品质因数的理论,并结合波导滤波器的制作方法,设计了一款包含非谐振节点(NRN)元件的脊型波导滤波器.在结构上对该滤波器进行了创新,利用非谐振节点的方式,在指定频率点处产生传输零点,使带外抑制提高了40dB,回波损耗也达到指标要求.滤波器选为六阶带通波导滤波器,中心频率为5GHz、带宽为200 MHz,HFSS中的仿真结果与理想结果较吻合,证明该设计是合理、可行的.The theories of extraction of generalized coupling coefficients including nonresonating nodes and external quality factor are introduced. On the basis, a ridge waveguide filter with nonresonating nodes is designed, employing the waveguide filter manufacturing method. This filter is a novel structure which successfully brings in the transmission zero in the certain frequency by nonresonating nodes. This kind of design makes the out of band suppression enhance remarkably, larger than 20 dE, and its return loss meet the qualification which has value in engineering. In this paper,it takes a 6- order waveguide bandpass filter as the example,whose center frequency is 5 GHz and bandwidth is 200 MHz. It is simulated in HFSS, and the simulation results obtained show very good agreement with desirable outcomes, which proves the design is reasonable and feasible.

关 键 词：非谐振节点 耦合系数提取 外部品质因数 波导滤波器 

分 类 号：TN713[电子电信—电路与系统]