DTH一体化平板天线增益测量方法  

Measurement Method of DTH Integrated Planar Antenna Gain

作　　者：于卫东[1] 于少飞 李勇[1] 王兰贵 杨波[3] YU Weidong;YU Shaofei;LI Yong;WANG Langui;YANG Bo(The 54th Research Institute of CETC,Shijiazhuang 050081,China;Changzhou Foreign Language School,Changzhou 213000,China;Unit 32620,PLA,Xining 810000,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]江苏省常州外国语学校,江苏常州213000 [3]中国人民解放军32620部队,青海西宁810000

出　　处：《无线电工程》2021年第5期396-401,共6页Radio Engineering

摘　　要：针对一体化平板天线增益测量的准确度问题,对直播卫星电视接收系统的组成和一体化平板天线的特点及其性能要求进行了简要介绍,系统地总结了卫星电视接收天线增益测量的传统方法,指出了在一体化卫星电视接收天线增益测试中的局限性,提出了在经典的比较法测量增益的基础上,通过在增益基准天线中增加同类型的低噪声下变频放大器,实现直播卫星电视(Direct to Home,DTH)一体化平板天线增益测试的新设想,巧妙地解决了由于此类天线输出信号变频而造成的不能同频比较增益的难题。分析了用改进的比较法测量一体化平板天线增益的误差,其均方根误差≤±0.3 d B。给出了工程测试实例,验证了该方法的可行性和有效性。In order to solve the accuracy problem of measuring integrated planar antenna gain,the component of direct-broadcast satellite TV receiving system and the features and performance requirements of integrated planar antenna are briefly introduced.The traditional method of measuring satellite TV antenna gain and its limitation are summarized.For improvement,a new method is proposed,in which an LNB is added to achieve the goal of measuring DTH integrated planar antenna gain based on the classic comparison theory.It addresses the challenge of co-channel gain comparison of this type of antenna.The error of antenna gain measurement using this improved comparison method is analyzed,and the RMS of measuring gain is reduced to less than±0.3 dB.In the end,a practical test example is provided to demonstrate the feasibility and effectiveness of this method.

关 键 词：直播卫星电视 一体化平板天线 增益测量 误差分析 

分 类 号：TN820[电子电信—信息与通信工程]