【摘要】：相比化學(xué)推進(jìn),電推進(jìn)具有比沖高和燃料消耗少的優(yōu)點(diǎn),可大幅度提高衛(wèi)星的機(jī)動(dòng)性和壽命.但由于等離子體對(duì)電磁波的吸收和折射效應(yīng),電磁波通過(guò)等離子體時(shí)將會(huì)衰減.文中利用射線追蹤、口徑積分和場(chǎng)強(qiáng)疊加原理,分析等離子體羽流對(duì)衛(wèi)星反射面天線遠(yuǎn)場(chǎng)輻射方向圖的影響,計(jì)算了羽流對(duì)2~5GHz頻段電磁波的衰減.與實(shí)驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比表明,對(duì)于20cm等離子體推進(jìn)器,在2~5GHz天線工作頻段,主瓣峰值衰減為0.3~2.5dB;在E平面,天線主瓣偏離天線軸向小于0.5°.
[Abstract]:Compared with chemical propulsion, electric propulsion has the advantages of high specific impulse and less fuel consumption, which can greatly improve the maneuverability and lifetime of the satellite. However, due to the absorption and refraction of electromagnetic waves by plasma, electromagnetic waves will attenuate when they pass through the plasma. The effect of plasma plume on far field radiation pattern of satellite reflector antenna is analyzed by means of ray tracing, aperture integral and field intensity superposition principle. The attenuation of plume to electromagnetic wave in 2~5GHz band is calculated. The comparison with experimental data shows that for 20cm plasma thruster, the peak value of the main lobe attenuates to 0.3 ~ 2.5 dB in the frequency band of the 2~5GHz antenna, and in E plane, the deviation of the main lobe from the antenna axis is less than 0.5 擄.
【作者單位】： 西安電子科技大學(xué)物理與光電工程學(xué)院;西安電子科技大學(xué)信息感知技術(shù)協(xié)同創(chuàng)新中心;
【基金】：中央高�；究蒲袠I(yè)務(wù)費(fèi)資助項(xiàng)目(JB160512) 國(guó)家自然科學(xué)基金資助項(xiàng)目(61571348)
【分類號(hào)】：TN820
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本文編號(hào)：2362878