高功率微波在低电离层中的互作用效应分析
Interaction effect of high power microwave in lower ionosphere
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摘要: 高功率微波在低电离层中传输时会产生非线性效应。分析了低电离层中HPM的互作用效应，推导了HPM在低电离层中传输的互作用因子同初始场强和微波频率的关系，并对不同条件下振幅交调深度同两个脉冲的延迟时间之间的关系进行了理论研究与数值模拟。结果表明：改变脉冲的延迟时间，振幅交调深度的变化规律也随之改变；为了减少吸收衰减，低电离层中传输的HPM电波的干扰波电场初始振幅与特征等离子体电场振幅的比值应保持在10以下。Abstract: The propagation of high power microwave (HPM) can produce nonlinear effect in lower ionosphere. In this paper, the analytical interaction effect of HPM in lower ionosphere, and the relation of interaction factor with the initial electric field and microwave frequency are analyzed when HPM propagates in lower ionosphere. Based on the study, the relationship between the amplitude cross modulation depth and the delay time of two pulses at different conditions are discussed and simulated numerically. The conclusion is that the rule of variety of the amplitude cross modulation depth changes with the different delay time, and the ratio of the initial electric field amplitude of interference waves to the plasma electric field amplitude should be controlled below “ten” when HPM propagates in low
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