摘要
随着极低频探地技术的发展,极低频电磁波在大地和电离层组成的腔体中的传播成为人们感兴趣的研究课题。基于时域有限差分算法,建立了地-电离层腔体中极低频电磁场的时间步进迭代公式,并分别计算了时谐振荡源和高斯脉冲源所激励的极低频电磁场及其传播特性,给出了可视化的计算结果,演示了球面导波结构对电磁波的汇聚效应以及地-电离层腔体中的舒曼谐振效应。
With the development of the ELF （extremely low frequency） earth exploratory technique, the excitation and propagation in the earth-ionosphere cavity has been an interesting research topic. Based on FDTD method, the time-stepping formulations of the ELF fields in earth-ionosphere cavity are established. The electromagnetic waves excited by harmonic source and Gauss impulse source are calculated respectively. And the visual results are presented, which demonstrate the wave focus effect of the sphere wave^uide structure and the Schumem resonant in the earth-ionosphere cavity.
出处
《电子设计工程》
2013年第3期118-120,共3页
Electronic Design Engineering
