小频率间隔的调频多工器解决方案  

Solution of FM Channel Combiner with Small Frequency Spacing

作　　者：刘敏 Liu Min(China Media Group,Beijing 100866,China)

机构地区：[1]中央广播电视总台,北京100866

出　　处：《广播与电视技术》2022年第3期80-84,共5页Radio & TV Broadcast Engineering

摘　　要：本文介绍了调频多工器的典型结构,指出在小频率间隔情况下,调频多工器最适合采用的结构形式为定阻抗型。文章对各种不同拓扑结构,即有着不同谐振腔数量和有限传输零点数量的调频带通滤波器进行分析,重点分析了滤波器的插入损耗和带外衰减指标。最后,文章分别给出应用不同拓扑结构带通滤波器的调频多工器在FM和CDR不同标准下所能实现的最小频率间隔。This paper introduces typical structure of FM channel combiners,and points out that under the condition of small frequency interval,the most suitable structure of FM channel combiner is CIB type.Then the paper analyzes various FM band-pass filters’ topologies with different number of resonators and finite transmission zeros,focusing on insertion loss and out-of-band attenuation of the filters.Finally,minimum frequency interval of FM channel combiners with different topology bandpass filters under different FM and CDR standards is given.

关 键 词：调频多工器 带通滤波器 频率间隔 带外衰减 有限传输零点 

分 类 号：TN943[电子电信—信号与信息处理]