基于时域有限差分法的机载天线电磁仿真分析

Analysis on Electromagnetic Simulation for Airborne Antenna based on FDTD Method

基于多任务的舰载直升机、舰载无人机等升空平台,往往因作战任务需要,需装备不同任务载荷,同时布置多付机载天线。因此,机载平台天线布局成为解决机载系统电磁兼容设计问题的关键,而时域有限差分法是解决电磁兼容问题的有效方法。通过机载天线放置于整个机体上进行仿真,得到受机体影响和布局设计后的天线方向图,并通过机载天线的电磁辐射特性分析,得出电磁场分布及天线布置最佳区域,从而为机载系统进行天线布局设计提供参考。

For different combat tasks, the shipborne helicopter, UAV and other aerial platforms need to be equipped with different mission loads and airborne antennas. The layout of airborne antenna is the key to solving the design problem of electromagnetic compatibility, while the FDTD （Finite Difference Time Domain） method is an effective method to solve the electromagnetic-compatibility problems. Simulation of the airborne antenna results in the obtainment of antenna pattern, and analysis of the electromagnetic radiation characteristics of airborne antenna in the acquisition of electromagnetic field distributions and optimal location of airborne antenna, thus to provide certain reference for the antenna-layout design of airborne system.