北京航空航天大学学报 ›› 2015, Vol. 41 ›› Issue (10): 1842-1847.doi: 10.13700/j.bh.1001-5965.2014.0811

• 电磁理论与应用 • 上一篇    下一篇

协同体制被动毫米波成像系统天线阵布局优化

尚晓舟, 孙鹏, 胡岸勇, 苗俊刚   

  1. 北京航空航天大学电子信息工程学院, 北京 100191
  • 收稿日期:2014-12-23 修回日期:2015-04-03 出版日期:2015-10-20 发布日期:2015-11-02
  • 通讯作者: 胡岸勇(1980-),男,湖南娄底人,讲师,hu_anyong@buaa.edu.cn,主要研究方向为被动毫米波成像系统设计与成像算法. E-mail:hu_anyong@buaa.edu.cn
  • 作者简介:尚晓舟(1986-),男,江苏南京人,博士研究生,whisperwind.shang@gmail.com
  • 基金资助:
    中央高校基本科研业务费专项资金(30344001)

Antenna array layout optimization of collaborative passive millimeter-wave imaging system

SHANG Xiaozhou, SUN Peng, HU Anyong, MIAO Jungang   

  1. School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2014-12-23 Revised:2015-04-03 Online:2015-10-20 Published:2015-11-02

摘要: 针对人体安检应用中的高分辨率实时成像需求,分析了被动毫米波成像系统中相控阵体制与综合孔径体制的关系,结合两者优势提出了一种协同体制被动毫米波成像系统.针对水平方向相控阵体制布局,利用模拟退火算法进行优化,提出采用不同孔径喇叭天线作为阵列单元的方式提升阵列性能,并对主波束效率最大化及副瓣电平最平坦两种准则下的优化结果进行比较;针对竖直方向综合孔径体制布局,设计了满足基线不缺失条件的冗余度最平均稀疏阵列布局.仿真分析结果表明优化后的阵列天线结构可满足被动成像中提升功率测量信噪比(SNR)的需求.

关键词: 综合孔径, 相控阵, 阵列优化, 模拟退火算法, 被动毫米波成像系统

Abstract: Based on the advantages of phased array and synthetic aperture imaging method in passive millimeter-wave imaging, a collaborative passive millimeter-wave imaging system was developed for real-time and high resolution imaging in human security application. In the horizontal orientation, by applying annealing algorithm, different aperture horn antennas were determined for the improvement of the phased array performance, which was generally compared with the maximum main beam effective and most smoothable sidelobe level. In vertical orientation, the synthetic aperture, namely, the sparse antenna array was designed by the criterion of the most uniform redundant baseline, while baseline absence should be avoided. Finally, simulation results reveal that with the optimized antenna array the requirement of increasing singal-to-noise ratio (SNR) in power measurement in the collaborative passive imaging system can be fulfilled.

Key words: synthetic aperture, phased array, array optimization, simulated anneal algorithm, passive millimeter-wave imaging system

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