| 引用本文: | 曾祥能,何 峰,张永顺,等.星载SAR天线阵面形变分析与补偿方法.[J].国防科技大学学报,2012,34(3):158-163.[点击复制] |
| ZENG Xiangneng,HE Feng,ZHANG Yongshun,et al.Analysis and compensation of spaceborne SAR antenna array deformation[J].Journal of National University of Defense Technology,2012,34(3):158-163[点击复制] |
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| 星载SAR天线阵面形变分析与补偿方法 |
| 曾祥能1,2, 何 峰2, 张永顺1, 董 臻2 |
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(1.空军工程大学 导弹学院，陕西 三原 713800;2.国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 研究了星载SAR天线阵面形变对波束输出的影响及形变补偿方法。针对未来星载SAR将采用的柔性阵面，提出了一种用于星载SAR天线的空间形变实时测量与控制的闭环系统，建立了阵面形变下阵列流形误差模型，得出小幅度形变主要影响波束的旁瓣输出，通过求解补偿形变权值的最小二乘解，使阵列形变补偿后波束输出与期望波束输出最佳逼近，并给出用于阵列误差补偿的阵列形变测量精度要求。仿真结果验证了本文方法结论的正确性与有效性。 |
| 关键词: 星载SAR 阵面形变 误差补偿 阵列流形 |
| DOI： |
| 投稿日期：2011-07-28 |
| 基金项目:国家部委资助项目 |
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| Analysis and compensation of spaceborne SAR antenna array deformation |
| ZENG Xiangneng1,2, HE Feng2, ZHANG Yongshun1, DONG zhen2 |
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(1.Missile Institute, Air Force Engineering University, Sanyuan 713800, China;2.College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The beam output of deformed Spaceborne SAR antenna array and the deformation error compensation are studied. Considering the flexible antenna array which may be adopted in the future Spaceborne SAR, a closed loop system for measuring and controlling of Spaceborne SAR antenna array’s deformation is proposed, and the steering vector model of deformed antenna array is presented. It was found that the mild deformation affect the beam’s sidelobe output more than the beam’s main-lobe. Then, the compensated weights were solved by the least square method, which can approximate the deformed antenna array outputs to the original antenna array outputs at most. Next, the deformed antenna array measuring precise demand was worked out. The validity of this method is verified by simulation. |
| Keywords: spaceborne SAR antenna array deformation deformation error compensation steering vector |
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