摘要
为了提高辐射电磁干扰(EMI,electromagnetic interference)的测量效率、测量精度和测量尺度,设计了一种改进的电小环探头,用来构建EMI近场测量的电小环探头阵列。通过改变高度、距离及功率参数,构建了双信号的同频干扰、带内干扰的开放近场测量环境。实际测量数据直观显示了被测全向天线和定向天线的E面和H面辐射EMI分布,重构了辐射信号空间分布状态,描述了同频干扰、不同干扰距离、不同干扰功率和带内干扰条件下的辐射干扰状态,对比了不同条件下的干扰变化趋势。研究发现,干扰距离越近,干扰功率越大,辐射干扰强度越大;同频干扰对干扰状态的影响大于带内干扰。本近场测量探头阵列可以实现对辐射干扰及干扰模式的判断,具有比较广泛的工程应用价值。
In order to improve the efficiency,accuracy and scale of measuring the radiated electromagnetic interference(EMI),an improved electric ringlet probe is designed and used to construct an electric ringlet probe array for EMI near-field measurement.By changing different height,distance and power parameters,an open near-field test environment of co-channel interference and in-band interference of dual signals is constructed.According to the actual measurement data,the radiation distribution of E-plane and H-plane of the tested omnidirectional antenna and directional antenna is visually displayed,and the spatial distribution state of the radiated signal is reconstructed.The radiated interference states under different interference distance,different interference power,co-channel interference and in-band interference are depicted,and the changing trends of interference under these different conditions are compared.It is found that the closer the interference distance,the greater the interference power,and the greater the intensity of radiated interference.In addition,the influence of the co-channel interference on the interference state is greater than that of the in-band interference.The near-field measurement probe array can realize the judgment of radiation interference and interference mode,which has a relatively wide range of engineering application value.
作者
宫峰勋
贺瑞瑞
GONG Fengxun;HE Ruirui(College of Electronic Information and Automation,CAUC,Tianjin 300300,China)
出处
《中国民航大学学报》
CAS
2022年第4期1-9,共9页
Journal of Civil Aviation University of China
基金
国家重点研发计划项目(2018YFC0809500)。
关键词
近场测量
探头阵列
辐射强度分布
干扰状态分析
near-field measurement
probe array
radiation intensity distribution
interference state analysis
