Susceptibility analysis of wideband RF receiving channel in the presence of an electromagnetic pulse (EMP)

Susceptibility analysis of wideband RF receiving channel in the presence of an electromagnetic pulse (EMP) is carried out in this paper. It mainly consists of antenna, limiter, filter, low noise amplifier (LNA), sensitivity control component, and power amplifier (PA), etc. Certain breakdown of the LNA under the impact of an EMP is demonstrated experimentally with different pulse widths, where its first-stage MESFET is damaged clearly. The output responses of the RF channel are simulated using the commercial software ADS for two types of EMP waveforms, respectively. It is evident that the channel performance is degraded seriously, due to the existence of the EMP. Under such circumstances, some special techniques for an effectively protecting the RF channel should be further employed.