一种改善带状线滤波器传输性能的分析方法  

An Analysis Method Imporving The Transimission Performance of Stripline Filter

作　　者：于忠吉[1] YU Zhong-ji(The 723 Institute of CSIC,Yangzhou 225101,China)

机构地区：[1]中国船舶重工集团公司第七二三研究所,江苏扬州225101

出　　处：《舰船电子对抗》2020年第4期107-109,共3页Shipboard Electronic Countermeasure

摘　　要：传统带状线滤波器是以闭合腔体的上下金属壳体为地,利用介质基片支撑金属带实现带状结构。这种结构容易因为金属壳体的加工公差而形成额外的空气间隙,常用的办法是采用薄金属垫片填充,这又引入了新的问题——额外的对地电容,从而导致滤波器性能下降。分析该问题产生的原因及影响,并结合模型拓扑分析、软件仿真和实测验证,给出了合理的解决办法,并提出了进一步优化设计方案。For the traditional stripline filter,the upper and lower metal shells of closed cavity is taken as ground,and the stripline structure is realized by using the dielectric substrate to support the metal strip.This kind of structure is easy to form extra air gap because of the machining error of the metal shell.The common solution is to use thin metal gasket to fill,which leads to a new problem,that is,additional ground capacitance,thereby the filter performance will be declined.This article analyzes the causes and effects of the problem,combined with model topology analysis,software simulation and measured verification,gives a reasonable solution,then puts forward the further optimization design scheme.

关 键 词：空气间隙 对地电容 模型拓扑 软件仿真 

分 类 号：TN713[电子电信—电路与系统]