太赫兹雷达反等离子体隐身研究

针对等离子体隐身目标的探测问题,从等离子体隐身机理和太赫兹(THz)频段高频、宽频带的反隐身特性出发,分析了太赫兹波反等离子体折射隐身和吸收隐身的可行性和优越性,建立了一种内封闭式等离子体隐身的理论模型,并采用分层介质方法分析计算了太赫兹波在内封闭式等离子体模型中的传输特性。结果表明,太赫兹波可以穿透一定密度和厚度的等离子体且能量衰减很小,使反射波增强,增大了等离子体隐身目标的RCS和有效探测等离子体隐身目标的概率,为太赫兹雷达反等离子体隐身设计提供理论依据。

Research on Anti Plasma-Stealth Performance of THz Radar

According to the problem of plasma-stealth target detection, this paper analyses the feasibility and advantage of THz radar against plasma refractive stealth and absorption stealth on the basis of the mechanism of plasma stealth and the high frequency and broad band anti-stealth capabilities of terahertz. An inside closed-mode of plasma-stealth target is established, and the SMM（stratum medium method） is used to analyse the THz＇s transmission capabilities in the inside closed-mode of plasma. It is proved that terahertz can penetrate through the plasma of certain density and thickness with little attenuation and strengthen the energy of reflection, which increa- ses the RCS and the detection possibility of the plasma-stealth target and also provides definite theory basis for the anti-stealth design of THz radar.