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the characteristics of very low frequency propagating waves (amplitude and phase velocity) in the waveguide critically depended on the geometry of the waveguide, the electrical conductivity of its borders and the geomagnetic field.
甚低频传播波（幅相速率）精密波导的特征取决于波导几何学、其边界的导电性和地磁场。
it was observed that the south atlantic very low frequency network (savnet) used the properties of very low frequency wave propagation on long distances between a transmitter and a receiver in the earth-ionosphere waveguide.
27. 据认为，南大西洋甚低频网络利用甚低频波在发射机和接收器之间进行地球 -- 电离层波导远程传播的特性。
a variety of other electro-optic components such as waveguides, switches and modulators have been demonstrated and some may well find their way into small, inexpensive components of fibre-optic communication and computing systems.
有人还示范了若干其他的电光学部件,例如波导、转换器和调制器,其中有些很可能成为纤维光学通讯和计算机系统的小型廉价部件。
