分布式负载平行板有界波电磁脉冲模拟器的模拟分析

Simulation for flat-plate bounded wave electromagnetic pulse simulator with distributed terminator

将并行时域有限差分方法用于分布式负载平行板有界波电磁脉冲模拟器模拟,并给出模拟器的尺寸参数对工作空间半高处几个测试点场的影响。研究结果表明:与源在x轴向距离上越靠近的点,其电场的上升沿越小;模拟器传输线最大宽度和最大高度之比为2,且下金属板宽度与传输线最大宽度相同时,测试点场的上升沿较小,半高宽较大;随着传输线在x方向投影长度的增加,与源位置x轴向等距离的测试点场的峰值增大,场的上升沿减小,但减小的量趋于平缓。且同轴线馈电时得到的各测试点场脉冲的上升沿要比直接加平面电场源的方式更大一点,半高宽则要小一点,但两者波形相似。

A parallelized finite-difference time-domain(FDTD)method for simulating the near-fields of bounded wave electromagnetic pulse(EMP)simulator with distributed terminator and parallel plate is presented.The effects of some model-parameters of simulator on the fields of the points at the half-height in the working volume are simulated and analyzed.The results show that,the rise-time of electric field at some points decreases as the distance along x-axis between the point and the source decreases;if the ratio of the transitional line's maximum width to the maximum height is 2,the rise-time of electric field at testing points is small while the FWHM is large as the width of the below PEC plate is equal to the transitional line's maximum width;as the projection length of transitional line increases,the peak value of electric field at the points with the same distance from the source along x-axis increase while the rise-time of electric field decreases,but the decreasement of rise-time tends stable.In addition,the rise-time of electric field at the same points as the simulator fed through the coaxial transmission line is smaller than that of the simulator fed by electric fields on the source plane,and the FWHM is larger,but the waveforms of electric are similar.