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

Abstract

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.