NURBS建模电大平台附近天线受扰方向图的分析

doi:10.3969/j.issn.1001-2400.2011.04.022

J4 ›› 2011, Vol. 38 ›› Issue (4): 124-128.doi: 10.3969/j.issn.1001-2400.2011.04.022

NURBS建模电大平台附近天线受扰方向图的分析

黄锴¹;贺之莉¹;张红伟¹;梁昌洪¹;苏航²

(1. 西安电子科技大学天线与微波技术重点实验室，陕西西安 710071；
2. 兰州大学信息科学与工程学院，甘肃兰州 730000)

收稿日期:2010-05-20 出版日期:2011-08-20 发布日期:2011-09-28
作者简介:黄锴(1984-)，男，西安电子科技大学博士研究生，E-mail: huangkai841025@126.com．
基金资助:
十一五预研资助项目(51307020204);国家自然科学基金资助项目(06091030)

Analysis of antenna around electrically large NURBS platform with improved MoM-PO method

HUANG Kai¹;HE Zhili¹;ZHANG Hongwei¹;LIANG Changhong¹;SU Hang²

(1. Science and Technology on Antenna and Microwave Lab., Xidian Univ., Xi'an 710071， China;
2. School of Info. Sci. and Eng., Lanzhou Univ., Lanzhou 730000， China)

Received:2010-05-20 Online:2011-08-20 Published:2011-09-28

摘要/Abstract

摘要：

传统的基于非均匀有理B样条(NURBS)曲面建模的物理光学结合矩量法(MoM-PO)，采用迭代电压矩阵实现MoM-PO混合过程可能存在迭代收敛性问题．针对该问题，采用修改阻抗矩阵实现MoM-PO混合过程，避免了潜在的迭代收敛性问题．采用Ludwig积分结合驻相法(SPM)计算Bezier曲面上物理光学电流的积分，既克服了传统方法中天线距离散射体较近时的算法失效，又维持了算法的效率优势．数值结果与MoM和三角形MoM-PO方法进行对比，证明了该方法的有效性．

关键词: 非均匀有理B样条, 物理光学结合矩量法, Ludwig积分, 电大平台

Abstract:

The conventional MoM-PO (Method of Moments-Physics Optics) method based on NURBS (None Uniform Rational B Spline) modeling is implemented by modifying the voltage matrix, the problem of iterative misconvergence may appear. To solve this problem, a method of modifying the impedance matrix is presented to avoid the potential misconvergence. Ludwig integral combining with SPM is utilized to calculate the integral of PO currents on Bezier surfaces. It overcomes the invalidity in the conventional method while keeping its efficiency. The comparison of the results obtained by this method with the ones in the literature and from pure MoM shows feasibility and accuracy of the present method.

Key words: NURBS, MoM-PO, Ludwig integral, electrically large platform

黄锴;贺之莉;张红伟;梁昌洪;苏航. NURBS建模电大平台附近天线受扰方向图的分析[J]. J4, 2011, 38(4): 124-128.

HUANG Kai;HE Zhili;ZHANG Hongwei;LIANG Changhong;SU Hang. Analysis of antenna around electrically large NURBS platform with improved MoM-PO method[J]. J4, 2011, 38(4): 124-128.

参考文献

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[2]	黄锴;贺之莉;梁昌洪. 改进的NURBS-PO法分析电大平台附近天线方向图[J]. J4, 2010, 37(5): 879-883.
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[5]	王楠;梁昌洪;张玉;陈铭. NURBS-UTD方法的爬行波射线寻迹算法 [J]. J4, 2007, 34(4): 600-604.
[6]	赵勋旺;张玉;梁昌洪. 电大平台中多天线辐射特性的快速计算 [J]. J4, 2007, 34(4): 596-599.
[7]	陈铭;张玉;王楠;梁昌洪. 基于NURBS建模技术的物理光学方法的遮挡判断[J]. J4, 2006, 33(3): 430-432.

NURBS建模电大平台附近天线受扰方向图的分析

Analysis of antenna around electrically large NURBS platform with improved MoM-PO method

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