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本文从分层模型出发,采用不变量镶嵌原理,给出了分析再入等离子鞘层中电磁波传播特性的理论方法,计算了电磁波的功率透射和功率反射系数。理论结果与飞行实测数据相符。本方法的优点是:物理概念清晰直观,公式简明,通用性强,计算程序适用于鞘层具有任意厚度、电子密度和电子碰撞频率具有任意分布形式以及任意多分层的情形。
Based on the principle of invariant inlaying, a theoretical method for analyzing the electromagnetic wave propagation in the plasma sheath is given. The power transmission and power reflection coefficient of the electromagnetic wave are calculated. The theoretical result is consistent with the measured data of flight. The method has the advantages that the physical concept is clear and intuitive, the formula is concise, and the versatility is strong. The calculation program is applicable to any thickness, electron density and electron collision frequency of the sheath having any distribution form and arbitrary multi-layering.