The spectral domain Green's functions of scalar and vector potentials for vertical and horizontal electric as well as magnetic dipoles in multi-layered medium are presented and verified.

本文给出多层媒质中水平和垂直电、磁偶极子的谱域标量位和矢量位格林函数的一般表达式，并验证了其正确性。

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Medium frequencies and horizontal magnetic dipoles (vertical loop antennas) can be used in underground radio communication in mining sections of coal mines.

中频频率和水平磁偶极子天线(垂直环状天线)是井下采区无线通信可使用的频段和天线型式。

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