摘要
天线波束中心指向稳定度是星载合成孔径雷达(SAR)天线的一个重要指标,影响天线波束中心指向稳定度的因素很多。该文以星载合成孔径雷达等间距均匀分布平面相控阵天线为分析对象,通过建立天线振动模型,分成多个阵元位移、天线阵面偏移、天线阵面振动等三种典型情况,对卫星天线在外力扰动情况下的天线方向图和回波相位变化情况进行分析,推导卫星天线稳定性对天线波束中心指向稳定度的影响,并进行了仿真,简要讨论了天线波束中心指向变化对SAR成像的影响。
As an important parameter of spaceborne SAR antenna, the antenna beam directivity stability is affected by many factors. The purpose of this paper is to build the antenna vibration models of the equal-step, uniform-distribution planar phased array antenna, and analyze the changes of the antenna pattern and echo phase based on three typical jitters： multi- elements displacement, antenna array slopping, antenna array vibration. At the same time, the movement of the antenna beam directivity, caused by satellite antenna stability, is researched and simulated. And the influence of the antenna beam directivity on SAR image qualities is discussed briefly.
出处
《计算机仿真》
CSCD
2005年第7期7-10,共4页
Computer Simulation
