摘要
为研究射电天文台址周边固定、移动干扰源对射电天文观测的影响,细化射电天文业务与其他业务间的电磁兼容(electromagnetic compatibility,EMC)分析,提出一种基于干扰源状态和辐射量级的EMC分析方法。首先,判断干扰源状态,依据其类型采集电磁干扰评估区域,划分区域得到各点/网格至望远镜的相对地形;然后,计算射电天文天线指向干扰源的增益并根据地形特征选用适宜电波传播模型预测电波传输损耗,进而预估干扰到达望远镜的功率大小;最后结合干扰电平限值、望远镜的指向,确定该干扰源对望远镜的干扰影响。本文对移动状态干扰源和固定状态干扰源的EMC分析与评估结果,可为台址周边电磁干扰协调及干扰兼容性分析提供技术支撑。
In order to analyze the impact of fixed and mobile interference sources around radio astronomical observatory site on radio astronomical observations,an electromagnetic compatibility analysis method based on the state of interference sources and the magnitude of radiation is proposed.Firstly,the state of the interference source is determined,and the electromagnetic interference evaluation area is collected according to its type,and the relative terrain of each point from the grid to the telescope is obtained by dividing the area.Secondly,the gain of the radio astronomy antenna pointing to the interference source is combined with the selection of suitable radio wave propagation model from the terrain characteristics to predict the radio wave transmission loss and calculate the power of interference reaching the telescope.Finally,the interference effect of the interference source on the telescope is determined by combining the interference level limit and the direction of the telescope.On this basis,the method is applied to the electromagnetic compatibility analysis and evaluation of the moving state interference source and the fixed state interference source,which provides technical support for the electromagnetic interference coordination and interference compatibility analysis around the radio astronomical observatory site.
作者
蔡明辉
马凌
董晓玉
刘奇
苏晓明
王娜
党振伟
CAI Minghui;MA Ling;DONG XiaoYu;LIU Qi;SU Xiaoming;WANG Na;DANG Zhenwei(Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China;Xinjiang Key Laboratory of Microwave Technology,Urumqi 830011,China)
出处
《电波科学学报》
CSCD
北大核心
2024年第4期706-714,共9页
Chinese Journal of Radio Science
基金
国家重点基础研究发展计划(2021YFC2203503)
新疆维吾尔自治区自然科学基金(2021D01E07)
中国科学院科研仪器设备研制项目(PTYQ2022YZZD01)。
关键词
固定干扰源
移动干扰源
干扰限值
遮挡
电磁兼容(EMC)
fixed state interference source
moving state interference source
interference limit
blockage
electromagnetic compatibility(EMC)
