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高频强场源对天馈系统的电磁耦合效应仿真
季 涛1, 罗建书2, 侯木舟3
1.中国商用飞机有限责任公司 上海飞机设计研究院,上海 201210;2.湖南交通工程学院 高科技研究院,湖南 衡阳 421009;3.中南大学 数学与统计学院,湖南 长沙 410083
摘要:
为获得天馈系统附近给定设备内部可能引起的电磁干扰的估计值,从而优化天馈系统的设计参数,采用COMSOL中的磁场模块,模拟完整天馈子系统在受到外部电磁场作用而激发出的电场强度和电流密度。模型空间采用无限元域截断,感应电流主要分布在天馈子系统固体的内外表面,其值一般在650 A/mm2左右,天馈子系统固体内部的感应电流小于6 A/mm2。对于壁面较薄的区域,固体内部的感应电流亦较大。仿真结果表明,天馈子系统对于外界辐射电磁源的偶合电磁效应主要集中在固体部分的表面,从而引起信号的改变,对误码率的作用较大。
关键词:  电磁耦合  网格划分  仿真  天馈系统
DOI:10.11805/TKYDA2019266
分类号:
基金项目:国家自然科学基金面上基金资助项目(11271370)
Simulation of electromagnetic coupling effect of high frequency and strong field source on antenna feed system
JI Tao1, LUO Jianshu2, HOU Muzhou3
1.Shanghai Aircraft Design and Research Institute,Commercial Aircraft Corporation of China Ltd,Shanghai 201210,China;2.High Technology Research Institute,Hunan Traffic Engineering College,Hengyang Hunan 421009,China;3.School of Mathematics and Statistics,Central South University,Changsha Hunan 410083,China
Abstract:
The purpose of this study is to obtain the estimation of the electromagnetic interference caused by the antenna feed system to the given equipment nearby, so as to optimize the design parameters of the antenna feed system. In this study, the magnetic field module in COMSOL is utilized to simulate the electric field intensity and current density excited by the whole antenna feed system under the external electromagnetic field. The model space is truncated by infinite element domain. The induced current is mainly distributed on the inner and outer surface of the solid of the antenna feed subsystem, and its value is generally about 650 A/mm2, while the induced current in the solid of the antenna feed subsystem is less than 6 A/mm2. For the region with thin wall, the induced current in the solid is also large. For a given excitation, the wave reaches two line probes at the same time and produces induction current. The simulation results show that the coupling electromagnetic effect of the antenna feed subsystem on the external radiation electromagnetic source is mainly concentrated on the surface of the solid part, which causes the signal to change and has a great effect on the bit error rate.
Key words:  electromagnetic coupling  grid division  simulations  antenna feed system

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