科研之友
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摘要
Due to the effects of air, High speed spacecrafts form a layer of plasma sheath on the surface, which may scatter and absorb electromagnetic wave. Thus, it leads to decreasing of the electromagnetic wave's intensity, and affects the quality of communications. In this paper, a double parabolic electron density distribution model is established. Then, the power transmission coefficient is deduced in detail by the analytic method using the Weber equation. Meanwhile, the power transmission coefficient of WKB method is deduced. Finally, the power transmission coefficients of these two methods are numerically simulated, which verifies the feasibility of WKB method in the hyperbolic model. In particular, we compare the applicability and limitations of the two methods. By comparing with other models (double exponential model and hyperbolic model), the WKB method has the least deviation in the case of the same electrical parameters and the same plasma thickness.
