时变等离子体与电磁波相互作用研究

通过实验验证了时变等离子体对电磁波产生的调制,证明了该调制的频率与等离子体变化频率保持一致,该调制本质是因为电磁波进入等离子体后波矢发生了改变,导致电磁波的幅度和相位产生了变化等离子体类似色散介质。随着信号的频率上升,等离子体调制的强度减弱。对调制后的信号进行解调幅和解调相,验证了调幅信号和调相信号具有同周期,但是周期内的变化不一样。

Varying Plasmas and Electromagnetic Waves

Through experiments, this paper validates the modulation on electromagnetic waves generated by time variation plasmas,and proves that the frequency of the modulation keeps consistent with the variation frequency of the plasmas. The essence of this modulation is because the wave vector changes after the electromagnetic waves enter the plasmas, which induces the changes on phases and amplitudes of the electromagnetic waves, and at this time, the plasma is similar to a dispersive medium. The influences of plasmas modulation weakens with the signal frequency increasing. After the demodulation of the amplitude and the phase of the modulated signals, it verifies that the amplitude modulation signals and the phase modulation signals have the same period, but vary differently in the period.