某气象雷达对高度表电磁干扰的预测和分析

Forecast and analysis of the EMI on aero altimeter from altimeter

为确定系统内电子电气设备协调工作的可能性,应进行系统电磁兼容性的预测分析。分析的结果既可以预测系统满足电磁兼容性的条件,也是为保障电子设备的电磁兼容性而采取实际措施的基础。但是,目前国内对电磁兼容性工程试验和测量的研究还很缺乏。本文以机载无线电高度表和某地面气象雷达组成的系统为例,介绍了一种接收机敏感度的测量方法。依据高度表的敏感度,分析其是否受气象雷达发射的电磁波的干扰。该项测试和分析是气象雷达建设的依据,对解决国内同类问题具有指导意义。

To confirm whether electric elements and electric devices of system can work in line, forecasting and analyzing system EMC is necessary. The analyzing results could be used to forecast EMC condition which the system need fulfill; meanwhile, they are the basis of practical steps to keep EMC. However, there is a lack of engineering experimentations in China at present. This paper illustrates a measurement method for susceptivity of receiver, which can he used in the system of the aero altimeter and meteorological radar. According to the susceptivity of altimeter, whether the aero altimeter receives EMI can be figured out. These test and analysis are the basis of fixing the meteorological radar, and have some instructional value to solve the similar problems.