Simulation analysis and experimental comparison of radiation near-fields for 10 meter-high TEM antenna

Radiation near-fields of 10m height TEM antenna are computed by parallelized finite-difference time-domain(FDTD) method. The effects of the source's excitation ways, terminator load, below plate's shape and the ground to the near-fields of that TEM antenna are discussed. And the regularity of simulation is agreed well with that of experiment. The simulation analysis shows that the simulation results of the TEM antenna with hard source are closer to the experimental results than those with soft source; the fields at the points near the antenna's end are affected by the terminator load greatly; the rise-time of some testing points increases as the rectangle below plate replaced by trapezoid one; the peak-value of testing points decreases and the rise-time increases as the ground around the below plate is considered.