从远场方向图反推天线面板调整量  

Inverse derivation of adjustment quantity of large segmented reflector antenna panel from far field pattern

作　　者：王伟[1] 宋立伟[1] 李鹏[1] 马洪波[1] 

机构地区：[1]西安电子科技大学电子装备结构设计教育部重点实验室,陕西西安710071

出　　处：《系统工程与电子技术》2011年第9期1959-1962,共4页Systems Engineering and Electronics

基　　金：国家自然科学基金(51035006;50905134);国家安全重大基础研究项目(国防973)(61358);中央高校基本科研业务费资助项目(K50510040008)资助课题

摘　　要：针对大型分块反射面天线面板调整次数多、效率低的问题,提出了一种从天线远场方向图反推出面板调整量进而快速调整的方法。应用物理光学(physical optics,PO)法建立了表面节点位移与远区电场的线性关系,将面板调整向量与远区辐射场强用线性方程组联系起来。利用奇异值分解(singular value decomposition,SVD)法求解线性方程组得调整向量,从而实现由方向图反推调整量的目的。对某工程案例进行了分析计算,给出了相应的数据与曲线,证明了所提方法的有效性,为大型天线反射面板的精确调整提供了指导。Aiming at the ineffective panel adjustment of the large segmented reflector antenna, a method for the determination of adiustment quantity of a panel from far field pattern and quick adjusting is presented. Using the method of physical optics （PO）, the relationship between the far field value and the node displacement is derived. Then the panel adjustment vector is related to far field pattern with linear equations. Singular value decomposition （SVD） is used to solve a set of adjustment quantity of panel, which will be used for quick adjusting. An experimental reflector antenna is analyzed and some related data and figures are obtained. The effectiveness of the method mentioned above is also discussed, and the results are going to be useful guide for panel adjusting of large reflector antenna efficiently and precisely.

关 键 词：大型反射面天线 远场方向图 面板调整量 机电耦合 

分 类 号：TN823.27[电子电信—信息与通信工程] TP306.2[自动化与计算机技术—计算机系统结构]