摘要
选取甘肃省成县中波转播台天线系统为研究对象,针对其高原地貌环境下面临的地网电阻偏高、馈线老化及冬季信号衰减等问题,提出一套系统性优化设计方案。通过三维地形建模优化卫星天线布局、重构分布式阻抗匹配网络、升级ClassⅡ防雷系统,并采用智能运维与机械强化技术,显著提升天线辐射效率与抗干扰能力。实验结果表明,优化后地网电阻降至3.1Ω,驻波比稳定在1.12,极端低温环境下信号衰减量控制在1.3 dB以内,系统覆盖半径由60 km扩展至82 km,年维护成本从28.0万元降至9.5万元。研究结果可为高寒、多风沙地区中波天线系统性能优化提供可复用的技术路径。
The antenna system of the medium-wave relay station in Chengxian county,Gansu province was selected as the research object.Aiming at the problems such as high ground grid resistance,aging of feeders and signal attenuation in winter faced by it in the plateau landform environment,a set of systematic optimization design schemes was proposed.By optimizing the layout of satellite antennas through 3D terrain modeling,reconstructing the distributed impedance matching network,upgrading the Class I lightning protection system,and adopting intelligent operation and maintenance and mechanical enhancement technologies,the radiation efficiency and anti-interference ability of the antennas have been significantly improved.The experimental results show that after optimization,the grounding grid resistance is reduced to 3.1,the standing wave ratio is stabilized at 1.12,the signal attenuation in the extreme low-temperature environment is controlled within 1.3 dB,the system coverage radius is expanded from 60 km to 82 km,and the annual maintenance cost is reduced from 280000 yuan to 95000 yuan.The research results can provide a reusable technical path for the performance optimization of medium-wave antenna systems in high-cold and windy sandy areas.
作者
韩利明
HAN Liming(Cheng county Broadcasting Transmitter Station,Gansu Radio and Television Bureau,Longnan 742500,China)
出处
《电视技术》
2025年第6期1-3,共3页
Video Engineering
关键词
中波转播台
天线系统
性能优化
medium-wave relay station
antenna system
performance optimization
