摘要:
为研究无人机壳体的屏蔽效能,基于数值仿真软件CST建立了无人机外壳的计算模型,分析了电磁波辐照方向、极化方式对无人机壳体内部电磁场分布的影响,得到了无人机壳体的屏蔽效能随壳体材料电磁参数的变化规律.提出了使用频率搅拌混响室测试无人机外壳屏蔽效能的方法,给出了测试流程,构建了测试系统,验证了该方法的有效性.结果表明:混响室频率搅拌方式能够在无人机壳体内部得到统计均匀的电磁场,在1~10 GHz频段壳体屏蔽效能在8~10 dB,不同测量位置得到的屏蔽效能测试结果偏差小于3 dB的概率为94%.
Abstract:
In order to study the shielding effectiveness of the unmanned aerial vehicle(UAV)enclosure,based on the numer-ical simulation software CST,the calculation model of the UAV enclosure was established,and the influence of electromagnetic wave radiation direction and polarization mode on the electromagnetic field distribution of the UAV was analyzed,the variation of shielding effectiveness with the electromagnetic parameters of the enclosure material was obtained.The method of testing the shielding effectiveness of the UAV enclosure using the frequency stirring reverberation chamber was proposed,the test procedure was given and the test system was built.The experimental results show that the method was effective.The results show that the frequency stirring reverberation chamber could get the statistics of the electromagnetic field in the enclosure of the UAV,and the shielding effectiveness of the enclosure in the 1-10 GHz band was about 8-10 dB.The probability of shielding effectiveness test re-sults with deviation less than 3 dB of different measurement positions was 94%.
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