【摘要】 采用时域有限差分法计算了不同特性电推力器等离子体喷流对不同频率通讯电磁波的衰减系数,采用空间透射波法进行了微波等离子体推力器喷流对C波段电磁波衰减的地面测试实验。理论计算和实验诊断结果表明:电推力器等离子体喷流对电磁波的衰减系数随着电磁波频率的升高逐渐减小,随着喷流等离子体频率的升高近似线性增大,随着喷流等离子体碰撞频率的增大呈先增大后减小的趋势;当喷流中等离子体数密度为0.9×1016~1.8×1016m-3时,C波段电磁波的衰减系数为1.5~6.0 dB,电推力器等离子体喷流对通讯信号的衰减效应不可忽略。更多还原

【Abstract】 The attenuation coefficient of electric thruster plasma jet for communication signals was calculated with time-domain finite-difference method.And the attenuation effect on C-band electromagnetic wave propagating through microwave plasma thruster jet was tested at ground using space-wave method.Theoretical calculation and experimental results show that the attenuation coefficient increases almost linearly with the plasma jet frequency,but decreases while the frequency of communication signals increasing.And it has an increasing first then decreasing tendency with the plasma collision frequency increasing.The attenuation coefficient of the C-band communication signal varies from 1.5 dB to 6.0 dB,with the plasma jet density from 0.9×1016 m-3 to 1.8×1016 m-3.The attenuation effects of electric thruster plasma jet on the communication signals can not be ignored.更多还原