The electromagnetic field with a vertical magnetic dipole in a three-layered

The effect of the sea bottom cannot be neglects in some situations, for example in the case of a low frequency, a shallow sea, and the access of transmitter or receiver in the sea bottom. The effect of the sea bottom on radio wave propagation is ascertained theoretically. And it will act as an important part in such cases. Two integrals transformation of the wave equations of Hertizan vector-a two dimensional Fourier transform in the horizontal coordinates in space are applied. The integral representation determines the electromagnetic field anywhere. Considering a three layered sea, the multipath reflection and multilateral wave that cannot be generated in a two-layered media are obtained.