Crust Covering The Prediction Of The Characteristics Of Electromagnetic Wave Propagation In The Layer

For few domestic and international studies of the radio propagation in the overburden of the earth's crust, this paper theoretically stresses the propagation problem of low frequency radio wave, including SLF wave and VLF wave, in the medium and briefly introduces the theory of Scale Model Testing Method.The application of Transverse Resonance Theory is firstly extended further from plane homogeneous medium to the inhomogeneous spatial region by primarily combining the current Martcatili Method. Then the Simplex Method is used to calculate the source point 's best position, frequency and the correspond wavenumber of the region. With these three calculated parameters, the attenuation factor value of the radio wave propagation in the earth's crust is calculated by the ways of Plane Wave Method and Communication Formula Method, and the value of the leakage on the ground is also calculated by the inhomogeneous medium's Field Analysis Method. At last, influences of the frequency, source point depth and conductivity's are concisely analyzed on low frequency wave's propagation characteristics in the earth's crust overburden.After simulation, it becomes more explicit on physical concept for solution process with the introduction of the wavenumber, and also more concise on solution. Since there are only few papers about the topic, the simulating result have no alternative but to compare with the data of the upper inhomogeneous terrain. The similar trend is found for the two results, and larger propagation attenuation will follow the higher frequency or larger conductivity of the medium.