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工程上,通过天线加载改变天线上的电流分布和输入带宽,同时缩短天线尺寸,实现天线小型化设计。本文将细导线FDTD与集总元件FDTD结合起来,模拟了强电磁脉冲对集总加载天线的耦合,并提出了网格内置集总元件的FDTD处理新方法。将该算法计算结果与商业电磁软件仿真结果进行对比,验证了算法的正确性。研究表明,天线加载集总元件不会改变天线上电流响应的主要频率成分,但会影响其幅值大小。
Engineering, through the antenna load to change the antenna current distribution and input bandwidth, while reducing antenna size, antenna miniaturization design. In this paper, the thin wire FDTD and the lumped element FDTD are combined to simulate the coupling of strong electromagnetic pulses to the lumped antenna, and a new FDTD method for the lumped element in the grid is proposed. The result of this algorithm is compared with the simulation results of commercial electromagnetic software to verify the correctness of the algorithm. The research shows that the antenna loading lumped elements will not change the main frequency components of the current response on the antenna, but will affect the amplitude of the antenna.