114《电视技术》第47卷第1期(总第566期)BROADCASTING&TRANSMISSION广播与传输文献引用格式:王依巧.中波天线调配网络原理及改频设计[J].电视技术,2023,47(1):114-116.WANGYQ.Theprincipleandfrequencychangedesignofmediumwaveantennadeploymentnetwork[J].VideoEngineering,2023,47(1):114-116.中图分类号:TN934.2文献标识码:ADOI:10.16280/j.videoe.2023.01.027中波天线调配网络原理及改频设计王依巧(浙江省中波发射管理中心泰顺广播转播台,浙江温州325500)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531kHz改为756kHz的改频设计过程、调试过程。关键词:中波天线;调配网络;改频设计ThePrincipleandFrequencyChangeDesignofMediumWaveAntennaDeploymentNetworkWANGYiqiao(Zhejiangmedium-wavetransmissionmanagementcenterTaishunbroadcastingstation,Wenzhou325500,China)Abstract:Thefrequencychangedesignofmediumwaveantennadeploymentnetworkneedstoensurethatitmatchesantennaimpedanceandfeederimpedancestrictly.Inordertofurtherimprovetheefficiencyoffrequencychangedesignofmediumwaveantennadeploymentnetwork,thispaperanalyzestheprincipleofimpedancematchingnetwork,anti-interferencenetworkandfrequencychangeprincipleofmediumwaveantennadeploymentnetworkfromtheperspectiveofpracticalapplication.Itispointedoutthatthespecifictypeofmatchingnetworkshouldbedeterminedaccordingtotheanalysisofthetotalimpedanceoftheantennaallocationnetworkduringthefrequencychangedesignofmedium-waveantennaallocationnetwork.InordertoavoidthesignalweakeningcausedbyLCseriesresonantnetworkloop,theparallelplusseriescompositenetworkstructurecanbeadopted.Basedonthis,thispapercarriesontheexperimentalcaseanalysis,elaboratedtheoriginal531kHzto756kHzfr...