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近年来,卫星地球站电磁环境日益恶化,必须加强卫星电磁干扰防护。天线作为卫星地球站最重要的设备之一,在完成正常收发任务的同时,也是电磁干扰耦合的主要途径。因此,对卫星地球站天线进行屏蔽是卫星地球站电磁干扰防护的一种行之有效的方式。根据刃峰绕射损耗模型,研究了地球站天线屏蔽体的设置方法,分析了屏蔽体设置距离与屏蔽体高度之间的关系。并根据理论分析结果,建议在地球站天线周围设置金属网。
In recent years, the electromagnetic environment of satellite earth stations is deteriorating day by day, and the electromagnetic interference protection of satellites must be strengthened. Antenna, as one of the most important equipment of satellite earth station, is the main way of electromagnetic interference coupling while completing the normal transmitting and receiving tasks. Therefore, shielding the antenna of the satellite earth station is an effective way to guard against EMI of the satellite earth station. According to the rapture diffraction loss model, the setting method of the antenna shielding body of the earth station is studied, and the relationship between the setting distance of the shielding body and the height of the shielding body is analyzed. According to the result of theoretical analysis, it is suggested that a metal mesh be provided around the antenna of the earth station.