电磁混响室高强度辐射场下机载电台敏感度研究

Research on the Sensitivity of Airborne Radio Station in Electromagnetic Reverberation Chamber High-intensity Radiation Fields

机载电台作为飞机典型用频机载设备,对其进行高强度辐射场(HIRF)辐照效应试验研究具有重要意义。为了解决混响室高强度辐射场环境的快速构建、快速调控及机载设备敏感度有效测试问题,依托混响室高强度辐射场辐射敏感度测试系统,以某型直升机机载电台为试验对象,在400 MHz^2 GHz频段内,通过改变混响室内部场强,分别确定混响室连续与步进两种工作模式下机载电台的典型故障类型和敏感度阈值。结果表明:在试验环境场强相同的条件下,相比步进工作模式,连续工作模式更容易测试出机载电台的敏感度阈值;搅拌器连续工作模式下,搅拌速度越快测试得到的机载电台敏感度阈值越低,随脉冲波脉宽的增加其敏感度阈值的测试结果呈下降趋势。

As the typical airborne equipment,it is of great significance to study the radiation effects of airborne radio station in high intensity radiation fields(HIRF).In order to solve the problems about quickly construct,rapidly adjust and effective testing of airborne equipment sensitivity in reverberation chamber high-intensity radiation field environment,a helicopter airborne radio station was used as a test subject in the reverberation chamber high-intensity radiation field radiation sensitivity test system in the frequency band of 400 MHz to 2 GHz,the typical fault type and sensitivity threshold of the test equipment were respectively determined in different working modes of the reverberation chamber by changing the electric field strength.The results show that the sensitivity threshold of the airborne radio station can be measured more easily in agitator continuous mode than step-by-step operation mode under the same conditions as the test environment field.In continuous working mode,the sensitivity threshold of the airborne radio station will decrease with the stirring speed.The faster the stirring speed,the lower the sensitivity threshold.And the tested results of sensitivity threshold will decrease with the increase of pulse width.