摘要
推动北斗(Beidou Navigation Satellite System, BDS)机载设备应用于民用航空器,将面临与已装载设备间的兼容性分析。铱星系统已相继在波音、空客等主要机型上集成应用,为航空器提供航空移动卫星服务。铱星系统用户链路与无线电测定业务(radio determination satellite service, RDSS)上行链路频谱重叠,针对北斗RDSS机载设备与铱星机载地球站进性兼容性评估。其中,机载天线间隔离度是评估机载系统电磁兼容(electromagnetic compatibility, EMC)的主要参数之一,将飞机机身理想化为纯金属的光滑圆柱表面,通过调整两系统天线的相对位置,分析天线布局对天线隔离度的影响。同时,收、发天线极化轴比与RDSS发射功率也对两系统的兼容性产生重要影响。仿真结果表明,北斗RDSS机载设备会对铱星机载地球站造成有害干扰,并给出合理的同机安装建议,为北斗RDSS机载设备在民航上的适航装机提供了参考。
To promote the application of Beidou Navigation Satellite System(BDS) airborne equipment on civil aircraft, it is necessary to conduct a compatibility analysis between BDS airborne equipment and other loaded equipments. Iridium system has been integrated and applied in the main aircraft types of Boeing and Airbus to provide aeronautical mobile satellite(rote) services[AMS(R)S]for aircraft. The user link of iridium system overlaps with the uplink spectrum of radio determination satellite service(RDSS), and therefore the compatibility between BDS RDSS airborne equipment and iridium airborne earth station(AES) was evaluated. The isolation between airborne antennas was one of the main parameters to evaluate the electromagnetic compatibility(EMC) of airborne system. The aircraft fuselage was idealized as a smooth cylindrical surface of pure metal. By adjusting the relative position between the two antennas, the effect of antenna layout on antenna isolation was analyzed. Meanwhile, the axial ratio of receiving and transmitting antennas and the RDSS transmitting power also had an important impact on the compatibility of the two systems. The simulation results show that BDS RDSS airborne equipment can cause harmful interference to the AES of iridium system, and reasonable installation suggestions are given. This study provides a reference for the airworthiness installation of BDS RDSS airborne equipment in civil aviation.
作者
刘瑞华
王新添
LIU Rui-hua;WANG Xin-tian(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China;Key Laboratory of Civil Aircraft Airworthiness Technology,Civil Aviation University of China,Tianjin 300300,China)
出处
《科学技术与工程》
北大核心
2021年第10期4103-4109,共7页
Science Technology and Engineering
基金
国家重点研发计划(2016YFB0502402)。
关键词
北斗无线电测定业务
铱星地球站
兼容性分析
机载天线
隔离度
radio determination satellite service of Beidou Navigation Satellite System
Iridium Earth Station
compatibility analysis
airborne antenna
isolation
