星载数字波束形成系统中阵元位置误差的分析  

Analysis on Antenna Element Position Uncertainties of Satellite-borne DBF System

作　　者：赵星惟[1,2] 吕源[1] 龚文斌[1] 梁旭文[1,2] 

机构地区：[1]上海微小卫星工程中心,上海200050 [2]中国科学院上海微系统与信息技术研究所,上海200050

出　　处：《通信技术》2010年第8期63-66,共4页Communications Technology

摘　　要：阵列天线的阵元位置误差能够造成数字波束形成系统性能的严重恶化。引起阵列天线导引矩阵失配的原因很多,阵元位置误差是最重要的因素之一。首先从物理的角度对阵元位置误差进行了理论建模,提出了阵元位置误差的圆柱形不确定度模型。作为整个天线系统误差构成的重要一环,对阵元位置误差造成的接收信号相位误差进行了量化分析,给出了相互关系。最后就如何消除阵元位置误差的影响进行了讨论。The position uncertainties of array antenna elements could severely degrade the performance of DBF system. Many factors could mismatch the steering-matrix of array antenna, and element position uncertainty is one of the most important factors. A theoretical model of element position uncertainty is constructed from the physical viewpoint, and then the columniform model of position uncertainties is proposed. As a most important part of the errors for antenna system, the phase errors of receiving signals resulted from the element position uncertainties are quantitatively analyzed, and the corresponding relation is also given. Finally, this paper makes a discussion on how to alleviate the impacts of element position uncertainties.

关 键 词：星载 数字波束形成 阵列天线 位置误差 

分 类 号：V423[航空宇航科学与技术—飞行器设计] V443