温度、密度对目标等离子体隐身效果影响的FDTD分析  

FDTD Analysis on the Effects of Plasma Temperature and Density on Target Plasma Stealth

作　　者：刘少斌[1] 袁乃昌[1] 

机构地区：[1]国防科技大学电子科学与工程学院

出　　处：《航空计算技术》2003年第1期8-12,共5页Aeronautical Computing Technique

摘　　要：采用等温近似,给出覆盖目标的不均匀的、各项同性的、热的、碰撞的、等离子体的电磁反射的三维FDTD算法的公式。在一维条件下,计算了不同密度分布、不同温度的等离子体对电磁波的反射系数。给出了温度、密度对电磁波在等离子体中的碰撞吸收的影响。结果显示,增大等离子体的温度和密度将有利于等离子体对电磁波的吸收,增大吸收的带宽,减小等离子体覆盖目标对电磁波的反射。A finite-difference time-domain (FDTD) algorithm is applied to study the electromagnetic reflection of conduction plane covered with inhomogeneous, collision, warm, isotropic plasma under the isothermal hypothesis. Under the one-dimensional case, the reflection coefficients of EM wave through various plasmas are calculated under different plasma densities, different plasma temperature conditions. The effects of plasma temperature and density on the collisional absorption of the EM wave by plasmas have been obtained. The results illustrate that the absorption of EM-wave by plasma collision is efficient, and the frequency width of absorption is wide when the plasma temperature and density are high.

关 键 词：温度 密度 影响 FDTD分析 等离子体隐身 雷达散射截面 电磁波 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]