Abstract
Numerical investigation of electromagnetic waves propagating near an ice cover with hummocks of different height has been carried out. Half-wave vibrators, melted into ice at the depth of about 20 sm, were used as an antenna. Transmitted signal frequencies were from 10 to 30 MHz. A mathematical model for amplitude spatial distribution of electromagnetic wave source, placed inside an ice cover with hummocks, was developed. The results of numerical study show that, when antenna is inside hummocks, the signal is amplified. Experimental investigations show good agreement with the theoretical model.
Highlights
We are to estimate the field of electromagnetic wave point sources placed in the ice layer of uneven form (Fig. 1) [1,2,3]
We introduce generalized angular coordinates for φ = 0: U1n = k0·sin(α ± αn); U2n = k0·cos(α ± αn); k0 = 2π/λ
Point M can be located in the air, ice layer or water
Summary
We are to estimate the field of electromagnetic wave point sources placed in the ice layer of uneven form (Fig. 1) [1,2,3]. The following medium characteristics are known: magnetic and dielectric permeability of mediums; power applied to the radiating antenna; signal frequency. Point M can be located in the air, ice layer or water. To estimate by “directed” Green’s functions, we consider the effect of each plane of ice relief on the resulting field.
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