基于高性能并行MLFMA的超大反射面天线的数值计算

2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition Pub Date : 2013-08-01 DOI:10.1109/IWEM.2013.6888766

Xu-Min Sun, Bin Li, Xiao-Min Pan, X. Sheng

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引用次数: 0

摘要

对500 m口径球面望远镜(FAST)的超大抛物面反射镜进行了计算。FAST反射镜是世界上最大的单碟，是一个半径为300米，孔径为500米的球形帽。为了精确计算FAST天线模型，采用并行多电平快速多极子算法(MLFMA)，并结合改进的稀疏近似逆(SAI)预调节器算法。采用基于MLFMA向上传递的快速远场计算方法，提高了编码效率。结果表明，天线增益效率提高了几千倍。为了验证计算结果，利用商业软件ANSYS FEKO进行了仿真，计算结果与仿真结果吻合较好。

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Numerical calculation of extremely large reflector antenna using high-performance parallel MLFMA

The extremely large parabolic reflector of the 500-m aperture spherical telescope (FAST) is calculated. As the largest single dish in the world, the FAST reflector is a spherical cap with a radius of 300 m and an aperture diameter of 500 m. In order to accurately calculate the FAST antenna model, the parallel multilevel fast multipole algorithm (MLFMA) is used, in combination with the improved sparse approximate inverse (SAI) preconditioner algorithm. Fast far-field calculation method based on upward pass of the MLFMA is used to accelerate the code efficiency. Result shows the efficiency for antenna gain is improved several thousand times. To verify the calculation, simulations using commercial software ANSYS FEKO were carried out, and good agreement between calculation and simulation is obtained.

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来源期刊

2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition

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