MLFMA分析复杂载体平台上天线问题
doi: 10.3724/SP.J.1146.2006.01271
Analysis of Antennas Mounted on Complex Platforms Using MLFMA
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摘要: 该文分析了导体介质复合结构平台上线天线的辐射问题。利用等效原理建立EFIE-PMCHW表面积分方程组，定义线、面和连接基函数描述复杂结构上电流分布，分析了导体介质分界面处基函数的处理；利用多层快速多极子方法(MLFMA)加速迭代求解过程中的矩阵矢量相乘运算，并用于有耗媒质求解。MLFMA的运用极大地提高了求解实际电大问题的能力。数值计算结果验证了方法的正确性和高效性。Abstract: Wire antennas mounted on complex platform combined with conducting and dielectric objects are analyzed in this paper. EFIE-PMCHW boundary coupled integral equations are constructed by using equivalence principle. The surface, wire and junction basis functions are defined to simulate the current distribution on the complex structure and the selection of the basis functions on the boundary of the conducting/dielectric interface is analyzed. Multi-Level Fast Multipole Algorithm (MLFMA) is employed to accelerate the matrix-vector multiplication and solve the loss problem. Application of MLFMA increases the ability to solve the large-scale problem. Numerical examples validate this method and demonstrate the accuracy and high efficiency of this method.
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