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文中使用基于 D-H 迭代的时域有限差分法(FDTD),计算分析了振子天线附近的障碍物对其输入阻抗和辐射方向图的影响。基于 D-H 迭代的 FDTD 实现方案能够方便处理一般有耗媒质,适用于该方案的 UPML技术易于实现问题空间和 PML 层的“无缝”连接,且物理概念清晰,便于理解和高效数值实现。文中所用方法与所得结果对于通信车或舰艇上天线的优化布局设计和电磁兼容性预测研究具有一定的参考价值。
In this paper, FDTD based on D-H iteration is used to analyze the influence of obstacles near the dipole antenna on its input impedance and radiation pattern. The FDTD implementation based on D-H iteration can easily handle the general lossy media. The UPML technology suitable for this solution is easy to realize the “seamless” connection between the problem space and the PML layer. The physical concept is clear and easy to understand and realize the numerical implementation. The methods and results obtained in this paper have certain reference value for the research on the optimal layout design and EMC prediction of antennas on communications vehicles or ships.