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VHF雷达回波距离拓展特性频率依赖关系研究

李统乐 李海英 徐彬 张雅彬 刘瑶

李统乐,李海英,徐彬,等. VHF雷达回波距离拓展特性频率依赖关系研究[J]. 电波科学学报,2022,37(2):314-320. DOI: 10.12265/j.cjors.2021056
引用本文: 李统乐,李海英,徐彬,等. VHF雷达回波距离拓展特性频率依赖关系研究[J]. 电波科学学报,2022,37(2):314-320. DOI: 10.12265/j.cjors.2021056
LI T L, LI H Y, XU B, et al. Research on frequency dependence of range extension in VHF radar echo[J]. Chinese journal of radio science,2022,37(2):314-320. (in Chinese). DOI: 10.12265/j.cjors.2021056
Citation: LI T L, LI H Y, XU B, et al. Research on frequency dependence of range extension in VHF radar echo[J]. Chinese journal of radio science,2022,37(2):314-320. (in Chinese). DOI: 10.12265/j.cjors.2021056

VHF雷达回波距离拓展特性频率依赖关系研究

doi: 10.12265/j.cjors.2021056
基金项目: 稳定支持经费项目(A132001W12,A131901W14);国家自然科学基金(61801349,61875156,62071359);陕西省自然科学基础研究计划(2020JM-192)
详细信息
    作者简介:

    李统乐:(1997—),男,山东人,西安电子科技大学物理与光电工程学院在读硕士,研究方向为相干散射雷达回波特性分析

    李海英:(1982—),女,山东人,西安电子科技大学物理与光电工程学院副教授,博士,研究方向为涡旋电磁波在复杂环境中的传播特性、电离层加热的实验和理论研究、电磁波在复杂粒子体系中散射特性

    徐彬:(1982—),男,辽宁人,中国电波传播研究所研究员,博士,研究方向为电波传播与空间等离子体探测

    通讯作者:

    徐彬 E-mail:jasur1982@163.com

  • 中图分类号: TN957.51

Research on frequency dependence of range extension in VHF radar echo

  • 摘要: 针对相干散射雷达探测中受方向敏感性的影响产生距离拓展的现象,研究了在不规则体尺度参数影响下回波距离拓展特性与雷达频率之间的依赖关系. 基于相干散射雷达回波方程,对回波展宽随不规则体尺度变化进行了计算,开展了雷达工作频率与距离拓展特性依赖关系的仿真,得到了雷达工作频率-展宽宽度拟合斜率随不规则体尺度变化规律. 结果表明,回波展宽宽度与雷达频率之间为线性相关,拟合斜率与不规则体纵向尺度之间存在一一对应的关系,通过线性回归计算的斜率可以用于反推不规则体的纵向尺度参数. 由于斜率计算无需获取绝对的雷达天线增益、馈线损耗和发射功率等参数,因此可为未标定的 VHF雷达提供一种新的不规则体尺度探测方法,这对开发新的不规则体探测技术具有重要意义.
  • 图  1  VHF相干散射原理图

    Fig.  1  VHF coherent scattering schematic diagram

    图  2  薄层不规则体的回波距离拓展

    Fig.  2  The range extension of thin irregularities

    图  3  不规则体沿场散射距离拓展示意图

    Fig.  3  Diagram of range extension of irregularities along the geomagnetic field

    图  4  回波功率随纵向尺度变化

    Fig.  4  Echo power variation with longitudinal scales

    图  5  回波功率随横向尺度变化

    Fig.  5  Echo power variations with transverse scales

    图  6  回波功率随雷达频率变化

    Fig.  6  Echo power varies with radar frequency

    图  7  纵向尺度参数的拟合斜率特征

    Fig.  7  Slope characteristics of longitudinal scale parameters

    图  8  拟合斜率与不规则体纵向尺度关系

    Fig.  8  The relationship between the slope of the fit and longitudinal scales

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  • 收稿日期:  2021-03-11
  • 网络出版日期:  2021-07-15

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