利用PO修正MM-UTD计算机载波导缝隙天线阵的方向图
doi: 10.3724/SP.J.1146.2006.02051
Modifying MOM-UTD with PO to Compute the Pattern of the Airborne Waveguide Slot Array
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摘要: 针对物理光学方法(PO)中Ludwig算法数值发散的问题,提出了解决方案。以复矢量场为接口,利用PO修正了MOM-UTD算法,并应用于机载波导缝隙天线阵方向图的计算。采用MOM分析天线自身的特性,UTD分析飞机形状简单的大型部件对天线方向图畸变的影响,PO分析机头等形状复杂的部件的影响。计算结果表明,此3种方法的结合算法适用于计算靠近机头的机载天线的方向图。Abstract: The formula is presented to solve the singular problem of Ludwigs algorithm. And vector field is used as interface to combine Physical Optics (PO) and Uniform Theory of Diffraction (UTD) and MOment Method (MOM) to calculate the airborne antenna. The character of the array is analyzed with MOM, large and simple parts of the plane are analyzed with UTD, and the complex parts are analyzed with PO. The results show that combing these three methods together is a good way for the pattern prediction of the airborne slot array.
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