摘要
随着调频数字音频广播系统的迅猛发展,CDR调频广播多工器逐渐被应用于多个广播发射台站,同时因其CDR数字信号更宽的频率占用,所以对多工器提出了更高的滤波特性要求。本文提出了一种适用于CDR调频广播的新型三腔交叉耦合带通滤波器,通过新型的交叉耦合技术极大提高了滤波器的滤波特性,大大降低频率合成时的频率间隔要求,同时也缓解了机房内空间的日益紧张。
With the rapid development of FM digital audio broadcasting system, CDR FM broadcasting multiplexers have been adopted in multiple broadcasting stations. As the frequency bandwidth of CDR signal is much wider, the multiplexers require better filter characteristics. This paper proposes a novel cross-coupled three cavities bandpass filter, benefited from a new cross-couple technology. The filter characteristics are improved tremendously and the requirements of frequency interval are vastly lower. The installation space for multiplexers is reduced as well.
作者
李斌
Li Bin(CMG Radio, Film ＆ TV Design and Research Institute, Beijing 100045, China)
出处
《广播与电视技术》
2018年第3期108-111,共4页
Radio & TV Broadcast Engineering
关键词
调频广播
带通滤波器
交叉耦合
FM broadcasting. Bandpass filter, Cross-coupled
