摘要
中波天线调配网络改频设计需要保证其与天线阻抗、馈线阻抗严格匹配。为进一步提升中波天线调配网络改频设计实效,以实践应用为视角,分析阻抗匹配网络原理、抗干扰网络原理、中波天线调配网络改频原理,指出技术人员在中波天线调配网络改频设计过程中,应根据天线调配网络的总阻抗分析,确定匹配网络的具体类型;为避免LC串联谐振网络的回路造成中波发射机发射信号减弱,可以采用并联加串联的复合网络结构。在此基础上进行案例分析,以某中波天线调配网络改频项目为例,详细阐述原有531 kHz改为756 kHz的改频设计过程、调试过程。
The frequency change design of medium wave antenna deployment network needs to ensure that it matches antenna impedance and feeder impedance strictly. In order to further improve the efficiency of frequency change design of medium wave antenna deployment network, this paper analyzes the principle of impedance matching network, anti-interference network and frequency change principle of medium wave antenna deployment network from the perspective of practical application. It is pointed out that the specific type of matching network should be determined according to the analysis of the total impedance of the antenna allocation network during the frequency change design of medium-wave antenna allocation network. In order to avoid the signal weakening caused by LC series resonant network loop, the parallel plus series composite network structure can be adopted. Based on this, this paper carries on the experimental case analysis, elaborated the original 531 kHz to 756 kHz frequency change design process and debugging process.
作者
王依巧
WANG Yiqiao(Zhejiang medium-wave transmission management center Taishun broadcasting station,Wenzhou 325500,China)
出处
《电视技术》
2023年第1期114-116,共3页
Video Engineering
关键词
中波天线
调配网络
改频设计
medium wave antenna
deployment network
frequency change design
