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针对应用较为广泛的一种短波双极天线,利用CST仿真分析了天线对高空核电磁脉冲(HEMP)的响应特性。计算了双极天线分别在自由空间和导体板上方时的天线端口开路及端接50Ω负载情况下的响应特性,得出了天线在两种情况下端口的感应电压时域和频域信号及负载的沉积能量,并探讨了其随电磁脉冲入射角θ、导体板半径R和天线高度H的变化规律。仿真结果对于实验方案的制定及天线系统防护具有重要指导意义。
Aiming at the shortcomings of a short-wave dipole antenna, the response of the antenna to the high altitude nuclear electromagnetic pulse (HEMP) is analyzed by CST simulation. The response characteristics of antenna with open antenna port and terminated with 50Ω load are calculated respectively when the bipolar antenna is in free space and above the conductor plate. The induced voltage of antenna in both time-domain and frequency-domain signals and the load The variation of deposition angle with the incident angle θ of the electromagnetic pulse, the radius R of the conductor plate and the height H of the antenna were discussed. Simulation results for the experimental program formulation and antenna system protection has important guiding significance.