采用混合算法分析舰船雷达间电磁干扰耦合

Analysis of EM interference coupling between shipboard radar antennas by hybrid method

为解决传统数值算法分析舰载雷达电磁兼容带来的计算机资源占用大、运算时间长和收敛性问题,对复杂环境下雷达电磁计算方法提出了改进思路,论述了舰上典型形状金属障碍物对舰载雷达波传播的影响,研究了矩量法和几何绕射理论混合算法在电磁干扰耦合分析中的应用方法,并在舰船电磁仿真模型上进行了计算,分析结果表明,相对于精确数值算法,该混合算法大幅提高了计算速度,计算误差优于3dB,具有良好的工程适用性。

The characteristic of super electric size makes it difficult to analyze and compute the EM interference between ship-based radar antennas. To solve the problem of great demand of computer resource, long computation time, and convergence of traditional numerical algorithm in EMC analysis of ship-based radars, the improving ways of computation methods for ship-based radars in complex environment was presented,and the influence of typical obstacles to EM wave＇s propagation was illustrated. Then this paper processes the application research of MoM and GTD hybrid method in interference coupling analysis. The results for EM simulating model of typical ship are obtained. Compared to the accurate numerical algorithm, the hybrid method largely improves the computation speed, and is well applicable for engineering. The error is better than 3 dB.