大型天线变形反射面的新拟合方法

大型天线变形反射面的新拟合方法

王从思;段宝岩;仇原鹰

(西安电子科技大学机电工程学院，陕西西安 710071)

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2005-12-20 发布日期:2005-12-20

A novel method for fitting the distorted reflector of a large antenna

WANG Cong-si;DUAN Bao-yan;QIU Yuan-ying

(School of Electromechanical Engineering, Xidian Univ., Xi′an 710071， China)

Received:1900-01-01 Revised:1900-01-01 Online:2005-12-20 Published:2005-12-20

摘要/Abstract

摘要： 基于反射面变形形状，提出一种新的大型天线变形反射面分块拟合方法．分析了天线结构与反射面节点位移，同时分块划分变形反射面，并采用Coons曲面拟合每个块域，利用周向三角拟合曲线与径向多项式拟合曲线来确定曲面片边界条件，从而得到全面、准确的反射面变形信息．对7.3m口径圆抛物面天线多工况下的电性能仿真，证明了该方法的准确性和有效性．

关键词: 变形面天线, 分块拟合, 辐射方向图, 法方程组

Abstract: Based on the actual shape of a distorted reflector, a novel divided-fit method (DFM) for fitting the distorted surface of a large reflector antenna is presented by combining hoop trigonometric function fitting and quadratic radial function fitting methods, and by using the Coons surface unit to fit each zone. The results of a 7. 3-m paraboloid antenna agree well with numerical simulations and radiation patterns, and show the accurate analysis of the distorted surface can be obtained by the DFM insteadof the best-fit paraboloid method.

Key words: distorted reflector antenna, divided-fit surface, radiation pattern, normal equations

中图分类号:

TN820.84

王从思;段宝岩;仇原鹰. 大型天线变形反射面的新拟合方法[J]. J4, 2005, 32(6): 839-843.

WANG Cong-si;DUAN Bao-yan;QIU Yuan-ying.

A novel method for fitting the distorted reflector of a large antenna

[J]. J4, 2005, 32(6): 839-843.

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