摘要
首次对时变磁等离子体片中的电波传播进行了分析。所得结果表明,沿正 z 轴传播的右旋圆极化平面波(入射波)在时变磁等离子体片中激励起11个波。有两个沿正 z 轴、一个沿负 z 轴方向传播的波的波数不变,频率与入射波的频率ω_0不同;另8个波的波数彼此相同,其大小由磁等离子体固有频率决定而与ω_0无关,除两个传播方向彼此相反的波的频率等于ω_0外,另6个波的频率均不等于ω_0.片两边的自由空间中各有一个与入射波相同的波,其余为衰减振荡场.当电子回旋角频率ω_0为0时,其结论与文献[6]给出的各向同性等离子体片中的结论一致;片厚 d→∞时,则可得到时变磁等离子体半空间中电波传播的结论.
Wave propagation in a time-varying magnetoplasma medium slab is investigated. The results show that a plane wave(the incident wave)propagating along positive z-direction in a magnetoplasma slab induces eleven waves.There are two waves propagating along positive z-di- rection and one propagating along negative z-direction whose wave numbers are kept,whose fre- quencies are different from the incident wave frequency(ω_0).The wave numbers of the other eight which equal each other are determined by the magnetoplasma intrinsic frequencies(ω_c and ω_p)and irrelation with ω_0.The frequencies of the eight waves but two ones' are different from ω_0.In free space of both sides of the slab,there are a wave which is the same as the incident wave and four induced oscillating fields.When the gyrofrequency ω_c=0,the results are in agreement with Ref. [6];when d→∞,the results of magnetoplasma half-space are obtained.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1993年第5期470-477,共8页
Journal of University of Electronic Science and Technology of China
关键词
平面波
磁等离子体
传播
拉氏变换
plane wave
magnetoplasma
propagating
Laplace transform
induce
