同轴腔滤波器传输零点的实现方法  

A Method to Achieve Transmission Zeros Based on Coaxial Cavity Filters

作　　者：刘扬[1] 

机构地区：[1]中国三江航天集团险峰厂,湖北孝感432100

出　　处：《湖北第二师范学院学报》2011年第2期101-103,共3页Journal of Hubei University of Education

摘　　要：随着通信技术的迅速发展,通信系统对低成本、小体积、低插损的高性能窄带滤波器件的需求日益增大,常规切比雪夫滤波器已不能满足这些高要求,而椭圆函数滤波器实现复杂、调试困难,难以广泛应用。于是,人们提出了采用准椭圆函数逼近的思想以降低实现难度:基于全极点的切比雪夫滤波器,在其通带边带引入有限的传输零点,以提高通带边带的抑制性能。而该思想的分析与实现方法一直是设计中的难点,本文在腔体滤波器的优化设计中着重介绍了增加传输零点的方法。Nowadays,the low-cost,small size,low insertion loss,high-performance narrowband filters is widely used in communication systems.Chebyshev filter can not meet these high requirements,elliptic function filter？ is difficult to achieve and debugging.Taking into account these problems,Quasi-elliptic function filter which has transmission zeros and high-performance narrowband is now being used in some special situations.How to design this filter is a complicated question,and this article will focus on ways to increase the transmission zeros during the design of the Coaxial cavity filters.

关 键 词：滤波器 高抑制 传输零点 

分 类 号：TN91[电子电信—通信与信息系统]