中波广播多频共塔带宽拓展的一种设计方法  

Design Method for Medium-wave Broadcasting Multi-frequency Common Tower and Bandwidth Expansion

作　　者：刘国伟 Liu Guowei(Station 909,Guangdong 519085,China)

机构地区：[1]广东省909台,广东519085

出　　处：《广播与电视技术》2024年第1期90-94,共5页Radio & TV Broadcast Engineering

摘　　要：本文基于我台所取得的《一种天线匹配网络及其匹配设计方法》专利,对天线匹配网络及其匹配设计方法进行了深入探讨。首先,通过预调网络对工作频点在发射天线塔底的阻抗进行预调,实现了工作频点的低Q值。其次,讨论了如何通过高Q值滤波网络,有效阻塞干扰频率,并通过校正网络维持通道的低Q值,从而实现发射频率的宽带宽。这一研究对于提高天线匹配网络的性能和稳定性具有重要意义。Based on the patent“An Antenna Matching Network and its Matching Design Method”obtained by our station,this article delves into the antenna matching network and its matching design method.Firstly,the impedance of the working frequency point at the bottom of the transmitting antenna tower is pretuned through a pretuning network,achieving a low Q value at the working frequency point.Secondly,it is discussed how to effectively block the interference frequency through a high Q value filtering network,and maintain the low Q value of the channel through a correction network,thereby achieving broadband transmission frequency.This study is of great significance for improving the performance and stability of antenna matching networks.

关 键 词：预调网络 阻塞网络 校正网络 低Q值 

分 类 号：TN934[电子电信—信号与信息处理]