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各向异性介质中电偶极子的太赫兹辐射特性

李应乐 王明军

李应乐, 王明军. 各向异性介质中电偶极子的太赫兹辐射特性[J]. 强激光与粒子束, 2023, 35: 063003. doi: 10.11884/HPLPB202335.220331
引用本文: 李应乐, 王明军. 各向异性介质中电偶极子的太赫兹辐射特性[J]. 强激光与粒子束, 2023, 35: 063003. doi: 10.11884/HPLPB202335.220331
Li Yingle, Wang Mingjun. THz radiation characteristics of the electric dipole in anisotropic media[J]. High Power Laser and Particle Beams, 2023, 35: 063003. doi: 10.11884/HPLPB202335.220331
Citation: Li Yingle, Wang Mingjun. THz radiation characteristics of the electric dipole in anisotropic media[J]. High Power Laser and Particle Beams, 2023, 35: 063003. doi: 10.11884/HPLPB202335.220331

各向异性介质中电偶极子的太赫兹辐射特性

doi: 10.11884/HPLPB202335.220331
基金项目: 国家自然科学基金项目(61102018 , 61271110)
详细信息
    作者简介:

    李应乐, liyinglexidian@126.com

  • 中图分类号: O436.2

THz radiation characteristics of the electric dipole in anisotropic media

  • 摘要: 研究了THz波段强降雨环境下电磁源的辐射特性。基于通用的麦克斯韦方程组和解析分析,提出了各向异性介质中的洛仑兹规范,得到了矢量势的非齐次波动方程及矢量势的精确表达式,并证明了它们的有效性。获得了各向异性介质中电偶极子的辐射场,将各向异性介质退化为各向同性时,得到的辐射场与已有资料中的辐射场一致。基于石膏晶体和强降雨介质的各向异性参数,对电偶极子的辐射特性进行了物理模拟和分析,结果发现:介质的各向异性对其中电磁源辐射有着显著的影响,强降雨中电磁源的辐射具有较弱的各向异性。
  • 图  1  能流密度随$\theta$的变化

    Figure  1.  Variation of energy flux density with angle $\theta$

    f=0.3 THz, θ0=π/4, φ0=π/4

    图  2  能流密度随$\phi$的变化

    Figure  2.  Variation of energy flux density with angle $\phi$

    f=0.3 THz, θ0=π/4, φ0=π/4

    图  3  能流密度随${\theta}$${\varphi}$的变化

    Figure  3.  Variation of energy flux density with angles ${\theta}$ and ${\varphi}$

    图  4  距离的变化$r$y轴方向辐射的影响

    Figure  4.  Radiation of y-direction varies with distance $r$

    图  5  仰起角对辐射的影响

    Figure  5.  Radiation of y-direction varies with elevation angle

    r=3.5 km f=0.4 THz, Idl1=0.6235Idl, Idl2=0.4717Idl, Idl3=0.6235Idl

    图  6  初始方位角对分量$\left| {\Delta {E_\theta }} \right|$的影响

    Figure  6.  Variation of the component $\left| {\Delta {E_\theta }} \right|$ with the initial azimuth

    图  7  初始方位角对分量$\left| {\Delta {E_\phi }} \right|$的影响

    Figure  7.  Variation of the component $\left| {\Delta {E_\phi }} \right|$ with the initial azimuth

    图  8  距离的变化ry轴方向辐射的影响

    Figure  8.  Radiation of y-direction with distance $r$

    $f = 0.34 \; {\rm{TH}{\textit{z}}},I{\rm{d}}{l_1} = 0.6235I{\rm{d}}l,I{\rm{d}}{l_2} = 0.4717I{\rm{d}}l,I{\rm{d}}{l_3} = 0.6235I{\rm{d}}l$

    图  9  初始方位角对分量$\left| {\Delta {E_\phi}} \right|$的影响

    Figure  9.  Variation of the component $\left| {\Delta {E_\phi}} \right|$ with the initial azimuth

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出版历程
  • 收稿日期:  2022-12-29
  • 修回日期:  2023-03-03
  • 录用日期:  2023-02-03
  • 网络出版日期:  2023-04-03
  • 刊出日期:  2023-05-06

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