基于NURBS建模技术的迭代MoM-PO方法分析电大尺寸平台天线方向图  

Analysis of Antenna Around Electrically Large NURBS Surface with Iterative MoM-PO Method

作　　者：陈铭[1] 王楠[1] 梁昌洪[1] 

机构地区：[1]西安电子科技大学天线与微波技术国家重点实验室,陕西西安710071

出　　处：《电子学报》2007年第3期392-395,共4页Acta Electronica Sinica

基　　金：博士学科点基金(No.20050701001)

摘　　要：本文采用基于非均匀有理B样条(NURBS,Non-Uniform Rational Bezier Spline)曲面建模技术的物理光学方法结合矩量法(Method of Moments-Physical Optics)分析位于电大尺寸平台附近天线的辐射方向图.文章推导了基于有理贝齐尔曲面的物理光学散射场计算公式.采用驻相法计算有理贝齐尔曲面上的物理光学感应电流积分.利用物理光学散射场迭代矩量法区域的电压矩阵.通过与传统平面片建模的物理光学方法的计算结果对比,说明本文方法的有效性和优点.The hybrid iterative method of moments and physical-optics method of moments （MoM-PO） is used to analyze radiation pattern of antenna around an electrically large platform modeled with non-uniform rational B-spline （NURBS） surfaces. The formula of scatter field based on NURBS surface is deduced. Stationary phase method （SPM） is applied for the integral of induced current on the rational Bezier surface. Results obtained by this method and by MoM-PO based on triangle facet model agree well while the former is more efficient in execution time.

关 键 词：非均匀有理B样条 物理光学 矩量法 驻相法 

分 类 号：O441.4[理学—电磁学]