基于不同网格形式的反射面天线方向图分析  

Far field pattern numerical analysis of reflector antenna based on different grid forms

作　　者：李鹏[1] 张志华[1] 王伟[1] 郑飞[1] 

机构地区：[1]西安电子科技大学机电科技研究所,陕西西安710071

出　　处：《系统工程与电子技术》2009年第2期347-351,共5页Systems Engineering and Electronics

基　　金：国家"973"计划课题(61358);国家自然科学基金(50475171)资助课题

摘　　要：反射面天线远场方向图分析中需要数值积分。分别针对扇形、三角形和四边形三种不同的积分网格形式,推导出相应的Gauss积分公式。对于扇形单元使用极坐标形式的Gauss积分公式,对于三角形单元使用面积坐标的Gauss积分公式,并将其推广到四边形单元。与常用的梯形积分相比,给出的积分公式能够有效减少计算时间,提高计算精度。与Hammer积分相比,给出的公式可以取得更高的精度,并且可以应用于四边形网格。通过仿真实验,讨论了网格划分形式与密度对积分精度的影响,仿真结果也表明了该公式的有效性和正确性。Numerical integration is applied for computing the far field pattern of parabolic reflector anten- nas. To analysis different grid forms, three improved Gaussian formulas are deduced as follows; 1. Gaussian formula in polar coordinates for sectorial gridl 2. Gaussian formula in area coordinates for triangle grid~ 3. Gaussian formula in area coordinates for quadrilateral grid. Compared with the traditional integration, formulas proposed in this paper are more accurate and less time expensel compared with the Hammer formula, formulas here are more accurate and could be used to quadrilateral elements. The influence of grid partition^s forms and density on integrative precision is discussed. Results of examples are submitted to demonstrate the proposed formulae.

关 键 词：反射面天线 机电耦合 数值分析 Gauss积分公式 网格划分 

分 类 号：TN957[电子电信—信号与信息处理]