Interaction effect of high power microwave in lower ionosphere

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