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依据均匀圆盘电流模型辐射电磁脉冲的轴线能量解析解,给出了单元天线轴线能量传输特性的物理实质,在此基础上,提出了时域天线辐射电磁脉冲的点源近似模型,并依次解析分析了阵列天线辐射电磁脉冲波束的能量传输特性,波束宽度等特征参数.采用基于Blumlein形成线的光导开关和超宽带槽天线一体化的辐射单元设计方法,研制了23*16单元的阵列瞬态电磁脉冲产生系统;在2.5km范围内,验证了瞬态电磁脉冲可以确定脉冲波形在自由空间传播、并具有场分量的相长叠加与波束聚焦特性等原理性概念;在误差范围内,理论计算与实验测试结果一致.
Based on the analytical solution of the axial energy of the electromagnetic pulse radiated by the uniform disk current model, the physical essence of the energy transmission characteristics of the antenna axis is given. Based on this, a point source approximation model of the electromagnetic pulse radiated by the time domain antenna is proposed, The energy transfer characteristic, beam width and other characteristic parameters of the array antenna radiation electromagnetic pulse beam are analyzed. The radiation unit design method based on the combination of the Blumlein formation line photoconductive switch and the UWB antenna is used to develop the array transient of 23 * 16 units In the range of 2.5km, it is verified that the transient electromagnetic pulse can confirm that the pulse waveform propagates in free space and has the concept of principle such as the overlap of the field components and the beam focusing characteristics. Within the error range, the theoretical calculation Consistent with the experimental test results.