高功率微波作用下单极天线瞬态响应特性研究

摘要

The finite⁃difference time⁃domain method(FDTD)combined with the coaxial equivalent feed model is adopted to calculate the frequency domain and time domain response of induced current of monopole antenna under action of HPM EMP. The interaction of the incident HPM to the frequency domain and time domain of induced current of monopole antenna is ana⁃lyzed. The impact of the distance between two monopole antennas on the induced current of the first monopole antenna is investi⁃gated. The numerical calculation result shows that the induced current spectrum of a single monopole is determined by the inci⁃dent HPM carrier frequency,and the induced current waveform is similar to HPM waveform. It is also demonstrated if other an⁃tennas exist,the first monopole antenna will be affected by the second one,and the more distant of these two monopole anten⁃nas,the less influence that the second one makes.%运用时域有限差分法（FDTD）结合同轴等效馈电模型计算了高功率微波（HPM）电磁脉冲作用下单极天线的感应电流的频域和时域响应，分析了单根单极天线感应电流频谱和时域响应与入射HPM间的关系，同时分析了两根天线间的距离对第一根天线末端感应电流的影响。计算结果表明，单根单极天线对HPM的感应电流频谱主要由入射HPM载波频率决定，感应电流波形与入射HPM波形相似；有其他天线存在时，对第一根天线会造成影响，且随距离增加影响减小。