高清卫星新闻直播车功放的选择  

Selection of Power Amplifier for HD Satellite News Live Car

作　　者：康傲 刘会 Kang ao;Liu Hui(Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018;Zhuji City Media,Zhuji,Zhejiang 311800)

机构地区：[1]浙江理工大学,浙江杭州310018 [2]诸暨市融媒体中,浙江诸暨311800

出　　处：《卫星电视与宽带多媒体》2020年第17期113-116,共4页Satellite TV & IP Multimedia

摘　　要：卫星新闻直播车系统即SNG(Satellite News Gathering),是以卫星通信系统作为传输平台,在新闻现场所采集到的视频及音频信号,通过卫星车系统处理,然后发射到同步通信卫星,再转送回电视台。高功率放大器(HPA High-power Amplifier简称高功放)是卫星上行系统中的核心设备,其功能是将上变频器变频放大后的信号进行功率放大,然后通过波导连接天线发射给卫星。SNG(Satellite News Gathering)is a satellite communication system as a transmission platform.The video and audio signals collected at the news scene are processed by the satellite car system,then transmitted to synchronous communication satellites and then transmitted back to TV stations.HPA Highpower Amplifier(HPA High-Power Amplifier for short)is the core equipment in satellite uplink system.Its function is to amplify the power of the signal amplified by the upconverter,and then transmit it to the satellite through waveguide connecting antenna.

关 键 词：饱和功率 增益 频带 1dB压缩点 SSPA TWTA KPA 

分 类 号：TN94[电子电信—信号与信息处理]