Terahertz waves have long been considered as the most efficient of many solutions to solve the blackout problem for the reason that terahertz waves have much stronger penetration than microwaves. In this paper, we will raise the incident wave band to terahertz band to discuss the application of terahertz technology in solving blackout problem. The plasma sheath attached to the reentry is considered as steady-state parabolic distribution. The back scattering radar cross section is used as an index to illustrate the strong penetration of terahertz wave, which is calculated with the Runge-Kutta Exponential Time Differencing-Finite Difference Time Domain method. The attenuation of electromagnetic wave in uniform plasma is analyzed with Wentzel-Kramer-Brillouin method. Moreover, the variation of different parameters of homogeneous and inhomogeneous plasma including the plasma density, the thickness of plasma and collision frequency, is also studied in this paper. It can be concluded that all the calculations of back scattering radar cross section reveals that terahertz wave have a powerful potential to cope with blackout problem and can be widely applied in the field of communication.

长期以来，太赫兹波一直被认为是解决停电问题的众多解决方案中最有效的方法，因为太赫兹波的穿透力比微波强得多。在本文中，我们将入射波段提升到太赫兹波段，讨论太赫兹技术在解决停电问题中的应用。附着在折返处的等离子体鞘被认为是稳态抛物线分布。后向散射雷达截面作为指标说明太赫兹波的强穿透性，采用Runge-Kutta指数时差-有限差分时域方法计算。用Wentzel-Kramer-Brillouin方法分析了均匀等离子体中电磁波的衰减。而且，本文还研究了均质和非均质等离子体不同参数的变化，包括等离子体密度、等离子体厚度和碰撞频率。可以得出结论，后向散射雷达截面的所有计算表明，太赫兹波在应对停电问题方面具有强大的潜力，可以广泛应用于通信领域。