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积分方程平面反射阵电磁建模技术
Electromagnetic modeling technique of flat parabolic surface based on integral equation methods
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摘要: 针对基于空间功率合成的空馈平面反射阵(FLAPS)型高功率微波辐射器的高效率电磁仿真需求，应用积分方程方法结合多尺度混合电磁建模技术 MLFMA-MLACE 进行问题的电磁建模及求解，主要过程包括：针对设计模型进行多尺度几何建模；在宏观层面采用多层快速多极子加速矩矢相乘；在微观层面采用多层笛卡尔展开加速求解。结合 W 波段的 FLAPS 初步模型，利用传统多层快速多极子技术(MLFMA)进行了精度验证，对于混合方法在仿真中的适用性、模型等效处理程度的影响以及计算成本等进行了分析。结果表明，该方法在内存及计算时间方面显著地提高了效率，论文还对后续改进方向进行了讨论。Abstract: For high efficient EM simulating requirements around FLAPS-typed HPM transmitters based on spatial power combination techniques,integral equation methods (IE)accompanied with multi-scale geometrical and EM modeling techniques named MLFMA-MLACE are applied in this paper.The algorithms mainly concern multi-scale geometrical modeling for the de-signed project,MLFMA acceleration in macroscopical layer and adaptive MLACE acceleration in microcosmic layer.Through some primary applications in W-band FLAPS models,the precision of the combined methods is validated.Its applicativity,ap-proximate level in detail,effects and computational cost are sufficiently analyzed.The results show that as to aspects of memory requirements and computational time,the combined technique has extremely evident advantage.Some discussions about future improvement are also given in this paper.
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