张春波,郭东明,盛贤君,柳敏静,孙玉文,雷明凯.平面波谱-表面积分法的快速算法[J].,2009,(6):854-857 |
平面波谱-表面积分法的快速算法 |
Fast algorithm for plane wave spectrum-surface integration method |
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DOI:10.7511/dllgxb200906014 |
中文关键词: 平面波谱-表面积分法 天线罩 集群系统 MPI 并行策略 |
英文关键词: plane wave spectrum-surface integration (PWS-SI) method radome cluster system MPI parallel strategy |
基金项目:国家自然科学基金资助项目(5077502350875035);“九七三”国家重点基础研究发展计划资助项目(2005CB724104). |
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中文摘要: |
针对平面波谱-表面积分法计算效率严重依赖于天线口径的问题,提出谱域积分预设方案,提取出谱域积分插值点,建立天线口径平面波角谱密度函数数据库,避免了大量重复计算,并将平面波谱理论的近场计算由四重积分弱化为二重积分.然后,根据平面波谱-表面积分法关于带罩天线远场电性能计算的思想,提出了基于等效源区域分解的并行平面波谱-表面积分算法.开发并在集群系统中实测了基于MPI环境的并行程序,作为应用计算了弹载天线-罩系统远场方向图,结果表明该程序高效准确. |
英文摘要: |
Aiming at the problem that the calculation efficiency of the plane wave spectrum-surface integration (PWS-SI) method severely relies on the antenna aperture, a pre-strategy for spectrum integration is introduced. It selects the spectrum integral-interpolation points to set up the database of the PWS density function for antenna aperture distribution. The strategy avoids mass repeat calculation and simplifies quadruple integral to double integral during the PWS theory antenna near-fields calculation. Then, based on the calculation process of antenna-radome far-fields calculation adopting the PWS-SI method, a parallel PWS-SI (PPWS-SI) algorithm based on decomposed equivalent source region is presented. An algorithm program, which is developed and tested in the message passing interface (MPI) environment on cluster system, is used to compute the antenna-radome system far-fields patterns. Its exactitude and higher efficiency are proved. |
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