摘要
飞机天线系统EMC设计的主题思想就是为了保证所有机载设备都能够相互无干扰地调和工作,即各天线在能够正常工作的同时,不会干扰其他天线的工作,还要兼顾天线的性能和工程安装要求,满足整机机载设备正常工作,任务设备也能够正常工作。采用仿真软件进行天线系统电磁兼容的仿真计算后制作了1∶1飞机壳体,进行了天线布局的缩比模型模拟测试,得出了整个飞机的天线布局方案。并提出当出现天线间隔离度太小,可能导致相互间干扰时,从系统层面上考虑分时或分频工作,而需要同时工作的不同频率的天线,应在系统链路上附加滤波器等措施,提高天线发射机对谐波和三阶交调系数的抑制。
EMC design purpose of the aircraft antenna system is to ensure that all the airborne equipments work normally without interaction interference.In addition,the design takes into account of the antenna performance and requirements of the antenna engineering installation,so as to meet the normal work of other airborne equipments.The simulation software is adopted to perform the simulation calculation of the electromagnetic compatibility of the antenna system in this paper.A 1：1 aircraft shell was produced to carry out the scale-reduced model simulation testing for the antenna layout.The scheme of the entire aircraft antenna layout was obtained.A conclusion that when the isolation degree is too small,it is supposed that the interaction interference may occur.The time-shearing and frequency demultiplication were considered in the system level.When more antennas work simultaneously at different frequencies,an additional filter should be put into the periodic line of the system or other measures should be taken to improve the inhibition ability of antenna transmitter in the harmonic and third order intermodulation coefficient.
出处
《现代电子技术》
2012年第16期112-113,125,共3页
Modern Electronics Technique
关键词
EMC
飞机天线布局
相互干扰
天线隔离度
EMC； overall arrangement of aircraft antenna； interaction interference； antenna isolation；
