电磁混响室高强度辐射场下机载电台敏感度研究

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~2GHz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。

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

In order to solve the problem about quickly construct, rapidly adjust and effective testing of airborne equipment sensitivity in reverberation chamber high-intensity radiation field environment. In the frequency band of 400 MHz to 2 GHz, a helicopter airborne radio station was used as a test subject in the reverberation chamber high-intensity radiation field radiation sensitivity test system, 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 was tested decreases with the faster stirring speed and the tested results of sensitivity threshold decreased with the increase of pulse width. The results of study are helpful to perfect the test methods and standard specifications about the electromagnetic radiation protection performance of airborne equipment.