星载SAR波束展宽研究
doi: 10.3724/SP.J.1146.2005.00985
Research on Beam Widening of Spaceborne SAR
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摘要: 该文提出了一种新型的混合遗传算法基于排序的主动变异型退火-遗传算法(AMAGA)，描述了星载SAR天线部分单元仅相位加权波束展宽方法，并将量化效应考虑在内，避免了量化所带来的误差，计算结果可直接工程应用。部分单元仅相位加权波束展宽方法比满阵单元相位加权更具有可实现性和灵活性。文中给出波束展宽实例，宽波束主瓣内凹口可以控制，且波束具有较低的副瓣电平。Abstract: This paper proposes a novel mixed genetic algorithmActive Mutating Anneal-Genetic Algorithm(AMAGA) based on sorting and describes an elevation beam widening method of spaceborne SAR antenna, which only changes the phases at part of array elements and so called Partly Phase-only Weighting Method (PPWM). Moreover, the resulting phases need not be quantized and can be directly applied to engineering project. In comparison with the fully phase-only weighting method for beam widening, the partly phase-only method for beam widening is more realizable and more flexible. Simulated examples show that the mainlobe notch of widened beam can be controlled finely with lower sidelobe.
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[1] 李建新. 阵列部分单元相位加权波瓣综合. 电波科学学报, 1997, 12(2): 216-219. [2] 王寒松等. 波束展宽的实现及其应用. ○八一科技, 2002, (1): 23-25. [3] Stutzman W L and COFFEY E L. Radiation pattern synthesis of planar antennas using the iterative sampling method[J].IEEE Trans. on Antennas and Propagation.1975, 23(6):764-769 [4] Khzmalyan A D and Kondratiev A S. The phase-only shaping and adaptive nulling of an amplitude pattern[J].IEEE Trans. on Antennas and Propagation.2003, 51(2):264-272 [5] 王小平等. 遗传算法理论、应用及软件实现. 西安: 西安交通大学出版社, 2002: 19-20. [6] 马云辉. 基于遗传算法的唯相位控制方向图零点生成. 微波学报, 2001, 2(17): 41-46. Ma Yun-hui. Null steering using genetic algorithms by controlling only the current phases. Journal of Microwaves, 2001, 2(17): 41-46. -
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