Ambiguity performance analysis of spaceborne SAR with thermal mechanism errors in phased array antenna
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摘要: 根据星载SAR相控阵天线结构特点,建立了天线热变形误差的数学模型,定义了阵面不平整度指标.基于成对回波畸变理论,推导了天线阵面存在热变形误差时的方向图函数表达式,导出了单频热变形误差分量与模糊度之间的统计关系,提出了定量分析星载SAR相控阵天线热变形误差对模糊性能影响的有效方法.基于L波段星载SAR天线进行了计算机仿真,验证了分析方法的正确性.Abstract: To analyze the ambiguity performance of spaceborne synthetic aperture radar (SAR) with onboard thermal mechanism errors in phased array antenna, a mathematical model for thermal mechanism errors was established, based on the characteristics of spaceborne SAR antenna. The formula of the antenna pattern with thermal mechanism errors were presented, on the basis of paired echo distortion theory. The statistical model for ambiguity performance analysis of thermal mechanism errors in phased array antenna was proposed. The maximum boundary of ambiguity performance requirement was educed. The computer simulation results of a L-band spaceborne SAR was proposed, by which the conclusion was validated.
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Key words:
- synthetic aperture radar /
- phase array antennas /
- performance analysis
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[1] 魏钟铨. 合成孔径雷达卫星[M].北京:科学出版社,2001 Wei Zhongquan. Synthetic aperture radar satellite[M].Beijing:Science Press, 2001(in Chinese) [2] 张澄波.综合孔径雷达——原理、系统分析与应用[M].北京:科学出版社,1989 Zhang Chengbo. Synthetic aperture radar-theory, system analysis and application[M]. Beijing:Science Press, 1989(in Chinese) [3] Hsicao J K. Array sidelobes, error tolerance, gain and beamwidth . ADA147004, 1984 [4]Purdy D S. In orbit active array calibration for NASA's LightSAR . IEEE International Radar Conference-Proceedings . Waltham,1999.172~176 [5]Wang H S C. Performance of phased-array antennas with mechanical errors [J]. IEEE Transactions on Aerospace and Electronic Systems, 1992, 28(2):535~545 [6]Bayma R W. Aperture size and ambiguity constraints for a synthetic aperture radar . IEEE 1975 International Radar Conference . Arlington, Va, 1975. 499~504 [7]Mehlis J G. Synthetic aperture radar range-azimuth ambiguity design and constraints . Proceedings of IEEE International Conference on Thermoelectric Energy Conversion . Arlington, 1980. 143~152 [8]Li F K. Johnson W T K. Ambiguities in spaceborne synthetic aperture radar systems [J]. IEEE Transaction on Aerospace Electronic System, 1983, 19:389~396 [9]Barnarossa S, Levrini G. An antenna pattern synthesis technique for spaceborne SAR performance optimization[J]. IEEE Trans on Geos and Remote Sensing, 1991, 29(2):1523~1528 [10] Ulaby F T, Dobson M C. Handbook of radar scattering statistics for terrain [M]. New York:Artech House editor, 1988 [11] 郭燕昌.相控阵和频率扫描天线原理[M].北京:国防工业出版社,1978 Guo Yanchang. Theory of phased array and frequency scanning antenna[M]. Beijing:Defence Industry Press,1978(in Chinese) [12] 张光义.相控阵雷达系统[M].北京:国防工业出版社,1994 Zhang Guangyi, Phased array radar system[M]. Beijing:Defence Industry Press, 1994(in Chinese) -
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