Abstract:

Normal electromagnetic method usually uses low-frequency to explore, which has less resolving power to meet request. Slowly decaying wave is a kind of electromagnetic waves which use special function as their sources. They not only have the quality of slow decay,but also narrow beam and focused energy, which are widely used in military and communication. For these qualities, when they are used in geophysical exploration, the depth and resolution of investigation can be improved. This paper particularly focuses on the theory and implementation of how to inverse underground structure by comparing incident wave and scattering wave, and recording the spare time of the waves,and forward calculations for igneous,metamorphic and sedimentary rocks are carried out to verify the feasibility.

Key words: special function, slowly decaying, electromagnetic wave