| 电磁场的空间相干性对均匀多波束影响研究 |
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| 引用本文： | 王建,王永根,谢渊,徐风清,张云祥. 电磁场的空间相干性对均匀多波束影响研究[J]. 电子科技大学学报(社会科学版), 2009, 0(2) |
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| 作者姓名： | 王建 王永根 谢渊 徐风清 张云祥 |
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| 作者单位： | 电子科技大学电子工程学院; |
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| 基金项目： | 国家自然科学基金(60632020) |
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| 摘 要： | 多波束反射面天线是无源毫米波成像系统接收前端,通过对均匀多波束抛物反射面天线的计算和分析,发现由于电磁场的空间相干性的存在,当馈源间距较小时多馈源抛物反射面天线得不到多个波束而是一个相干波束。电磁场的空间相干性影响到波束间的均匀性和成像质量,通过增加相邻馈源间距,电磁场的空间相干影响减小,独立波束开始出现,该结论能够指导多波束反射面天线的馈源阵排列。用FEKO软件对多馈源反射面天线的仿真结果可以证明结论的正确性。
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| 关 键 词： | 相干波束 多波束 无缘毫米波成像 空间相干 |
Spatial Coherence Effect on Uniform Multi-Beam |
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| WANG Jian,WANG Yong-gen,XIE yuan,XU Feng-qing,, ZHANG Yun-xiang. Spatial Coherence Effect on Uniform Multi-Beam[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2009, 0(2) |
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| Authors: | WANG Jian WANG Yong-gen XIE yuan XU Feng-qing ZHANG Yun-xiang |
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| Affiliation: | School of Electronic Engineering;University of Electronic Science and Technology of China Chengdu 610054 |
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| Abstract: | The multi-beam reflector antenna is the front-end receiver of the passive imaging system. Due to spatial coherence effect of electromagnetic field, the uniform multi-beam parabolic reflector antenna is analyzed. The calculated results show that the beam generated by a multi-feeds parabolic reflector antenna is a coherent beam not a multi-beam when the distance of feeds reduced. It is proved that the effect of spatial coherence will reduce and the independent beam will arise when the distance of feeds is inc... |
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| Keywords: | coherent beam multiple beams passive imaging system spatial coherence |
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