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本文用时域有限差分方法分析和优化了前端是平行板传输线的横电磁波喇叭天线（其激励源是由同轴线馈入的超宽带电磁脉冲），优化了平行板传输线和横电磁波喇叭的尺寸，给出了天线的一些特性参数随频率的变化关系、天线的辐射场分布、天线辐射的能量方向图以及天线长度对增益的影响等。
In this paper, the finite-difference time-domain method is used to analyze and optimize the transverse electromagnetic horn antenna (the excitation source is the ultra-wideband electromagnetic pulse fed by the coaxial line) with the front end being a parallel plate transmission line. The dimensions of the parallel plate transmission line and the transverse electromagnetic horn are optimized, Some characteristic parameters of the antenna are given as a function of frequency, the radiation field distribution of the antenna, the energy pattern of the antenna radiation, and the effect of the antenna length on the gain.