外加磁場(chǎng)改善臨近空間GPS通信研究
[Abstract]:In order to solve the problem of communication "black barrier" caused by the aircraft passing through the adjacent space atmosphere at hypersonic speed, the scheme of applying magnetic field to change the electromagnetic environment to solve the problem of communication black barrier is put forward. Based on the flight test data provided by RAM C of the United States, a model of magnetized plasma sheath was established. The magnetic field intensity and plasma thickness were analyzed by numerical method. The reflection and attenuation characteristics of plasma collision frequency and plasma electron density on GPS signal transmission. Comprehensive analysis and simulation show that the transmission performance of electromagnetic wave in plasma sheath can be improved obviously by adding magnetic field around spacecraft for GPS signal at low frequency. When the applied magnetic field intensity is greater than 2T, The propagation attenuation of GPS signal in plasma sheath is below 5dB, which can effectively slow down the influence of black barrier on electromagnetic wave transmission and achieve a better communication state.
【作者單位】: 空軍工程大學(xué)理學(xué)院;
【基金】:陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2014JM8344)
【分類(lèi)號(hào)】:V443.1
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