提高级联滤波模块带外抑制的方法  

Method of improving out-band rejection of cascaded filter module

作　　者：刘杰[1] 占腊民[1] 鲁统庭[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《现代电子技术》2012年第5期160-162,共3页Modern Electronics Technique

基　　金：国家自然青年科学基金项目(61001012)资助;华中科技大学国防科研自主创新基金2011

摘　　要：级联滤波器模块在短波通信中起到至关重要的作用。为了提高带外抑制这一重要指标,通过研究级联网络的带外抑制跟前后级网络反射系数的关系,给出了级联网络失配损耗的公式,分析比较了衰减网络、隔离器等改善带外抑制的手段,进而提出了插入一般性网络以提高带外抑制的可能性,证实了这一方法是高效可行的。Cascade filter plays an important role in short-wave communication.To improve out-band rejection,through studying the relationship between the out-band rejection and the reflection coefficient,the mismatch loss formula of cascaded network is proposed.The means of using attenuation network and isolator to improve the out-band rejection are analyzed.The possibility of inserting a general network to improve the out-band rejection is proposed,and the method is proved to be efficient and feasible.

关 键 词：带外抑制 级联网络 带通滤波器 失配损耗 

分 类 号：TN713-34[电子电信—电路与系统]