涡旋电磁波雷达成像分辨力研究

王建秋 刘康 王煜 王宏强

王建秋, 刘康, 王煜, 等. 涡旋电磁波雷达成像分辨力研究[J]. 雷达学报, 2021, 10(5): 680–690. doi: 10.12000/JR21054
引用本文: 王建秋, 刘康, 王煜, 等. 涡旋电磁波雷达成像分辨力研究[J]. 雷达学报, 2021, 10(5): 680–690. doi: 10.12000/JR21054
WANG Jianqiu, LIU Kang, WANG Yu, et al. Resolution analysis of vortex electromagnetic radar imaging[J]. Journal of Radars, 2021, 10(5): 680–690. doi: 10.12000/JR21054
Citation: WANG Jianqiu, LIU Kang, WANG Yu, et al. Resolution analysis of vortex electromagnetic radar imaging[J]. Journal of Radars, 2021, 10(5): 680–690. doi: 10.12000/JR21054

涡旋电磁波雷达成像分辨力研究

doi: 10.12000/JR21054
基金项目: 国家自然科学基金(61801486, 61921001)
详细信息
    作者简介:

    王建秋(1994–),男,安徽安庆人,国防科技大学电子科学学院博士研究生。主要研究方向为电磁涡旋与雷达前视成像

    刘康:刘 康(1990–),男,江苏泗阳人,国防科技大学电子科学学院副教授。主要研究方向为雷达前视成像与电磁涡旋

    王煜:王 煜(1996–),男,江苏东台人,国防科技大学电子科学学院博士研究生。主要研究方向为涡旋电磁波雷达探测与信号处理

    王宏强(1970–),男,陕西人,国防科技大学电子科学学院研究员。主要研究方向为太赫兹雷达与雷达成像

    通讯作者:

    刘康 liukang1117@126.com

  • 责任主编:郭忠义 Corresponding Editor: GUO Zhongyi
  • 中图分类号: TN95

Resolution Analysis of Vortex Electromagnetic Radar Imaging

Funds: The National Natural Science Foundation of China (61801486, 61921001)
More Information
  • 摘要: 相位波前受轨道角动量调制的涡旋电磁波,在雷达前视成像领域得到广泛关注和研究。基于涡旋电磁波雷达成像原理和方法,该文重点对方位分辨力展开研究。首先,分析了贝塞尔幅度项对方位分辨性能的影响,结果表明,在贝塞尔幅度窗影响下,涡旋电磁波雷达方位分辨性能由有效OAM模态范围决定。其次,提出了一种有效OAM模态范围计算方法,并分别对方位角分辨率、空间分辨率以及超实孔径雷达分辨率进行了表征。最后,仿真分析了方位基本分辨性能随不同影响因素的变化规律,改变波长孔径比、成像俯仰角,能增大有效OAM模态范围,提升方位分辨性能。拟合得到了有效OAM模态范围、超实孔径雷达分辨率关于波长孔径比和成像俯仰角的近似表达式,为涡旋电磁波雷达参数设计与优化提供参考。

     

  • 图  1  涡旋电磁波雷达成像示意图

    Figure  1.  Diagram of the vortex electromagnetic radar imaging

    图  2  理想情况涡旋电磁波雷达方位空间分辨率以及超实孔径雷达分辨率曲线

    Figure  2.  Ideally spatial-resolution and the super resolution as a function of different influence factors

    图  3  贝塞尔相位补偿及对应的点扩展函数图

    Figure  3.  Bessel term compensation and the corresponding point spread function of azimuth

    图  4  不同参数下贝塞尔幅度窗及方位剖面图

    Figure  4.  Bessel windows and azimuth profiles with different parameters

    图  5  有效OAM模态范围计算流程

    Figure  5.  The flowchart of the effective OAM modes scope calculation

    图  6  方位分辨率及空间分辨率曲线

    Figure  6.  Curves of azimuth resolution and spatial resolution

    图  7  方位超实孔径雷达分辨率曲线

    Figure  7.  Curves of azimuth super real aperture radar resolution

    图  8  有效OAM模态范围与超实孔径雷达分辨率函数拟合

    Figure  8.  Effective OAM modes scope and super real aperture radar resolution function fitting

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出版历程
  • 收稿日期:  2021-04-23
  • 修回日期:  2021-06-09
  • 网络出版日期:  2021-06-22
  • 刊出日期:  2021-10-28

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