Analyzing the Electromagnetic Scattering Characteristics for 3-D Inhomogeneous Plasma Sheath Based on PO Method
Analyzing the Electromagnetic Scattering Characteristics for 3-D Inhomogeneous Plasma Sheath Based on PO Method
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DOI：
10.1109/tps.2016.2612003
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发表时间：
2016-09
影响因子：
1.5
通讯作者：
Song-hua Liu;Li-xin Guo
中科院分区：
文献类型：
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作者：
Song-hua Liu;Li-xin Guo
利用物理光学方法研究了S波段至Ku波段电大尺寸钝锥在非均匀等离子体鞘层中的散射特性。PO配方推导出导电物体与不均匀的等离子体覆盖。计算结果表明，等离子体的不均匀性对雷达散射截面（RCS）有很大的影响。然而，在不同入射波条件下，尤其是在高频区，正弦等离子体频率分布和正弦等离子体频率分布以及碰撞频率分布下的散射结果基本一致，只是在某些特定频率处RCS值略有不同，表明仅考虑等离子体频率分布不均匀的等离子体鞘层模型是合理的。此外，还分析了等离子体参数对等离子体非均匀散射的影响。
The scattering characteristics of a blunt cone with electrically large size covered by inhomogeneous plasma sheath are investigated from S-band to Ku-band frequencies by using physical optics (PO) method. PO formulations are derived for conductive objects with inhomogeneous plasma coverage. The numerical results indicate that the plasma inhomogeneity greatly influences the radar cross section (RCS). However, under different incident wave conditions, particularly in the high-frequency band, the scattering results are almost consistent for sine plasma frequency profile and both plasma and collision frequency with sine profile except that the amount of RCS exhibits a little difference at some specific frequencies, indicating the reasonability of the plasma sheath model with only inhomogeneous plasma frequency distribution. Moreover, the effects of the plasma parameters on inhomogeneous plasma scattering are also analyzed.