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作 者:吴小坡[1,2] 时家明[1,2] 杜石明[1,2] 高永芳[2] 党可征[2]
机构地区:[1]电子工程学院脉冲功率激光技术国家重点实验室,合肥230037 [2]电子工程学院安徽省红外与低温等离子体重点实验室,合肥230037
出 处:《真空科学与技术学报》2012年第3期244-247,共4页Chinese Journal of Vacuum Science and Technology
基 金:安徽省红外低温等离子体重点实验室基金项目(编号:2007A0103013Y)
摘 要:研究时变等离子体覆盖导体圆柱的双站散射特性对等离子体隐身技术和太空再入体的跟踪识别技术具有重要的意义。以非磁化不均匀等离子体覆盖导体圆柱的模型为基础,采用分段线性电流密度递归卷积时域有限差分方法计算了不均匀时变等离子体覆盖导体圆柱的双站雷达散射特性。结果表明:不均匀等离子体覆盖导体圆柱能成功地缩减目标的雷达散射截面。The bi-station scattering characteristics of the non-magnetized, non-uniformly distributed, time-varying plasma, covered on the conductor columns in space environment, were modeled, simulated in the piecewise liner JE recur- sive convolution finite difference time domain method, for the purposes of improving the existing techniques of plasma stealth, tracking and identifying the re-entry of spacecrafts. The impacts of the frequency of the incident electromagnetic (EM) waves, and various key plasma parameters, such as the plasma thickness, plasma temperature, and the rising time of the time-varying plasma,on the scattering cross-section were simulated. The simulated results show that the covering of non-uniform plasma on conductor column significantly reduces the scattering cross-section of radar. Further research work of the simulation was also tentatively discussed.
关 键 词:时域有限差分等离子体雷达散射特性
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