No abstract

VI International Scientific and Technical Conference "Radio Engineering, Electronics and Communication"

No abstract

The results of estimate of the effective dielectric permittivity a presented. We measured the soil moisture data in a toplayer 2 meters thick. This data used to calculate the view of depth’s dependence of real part of the soil’s complex dielectric permittivity and conductivity. We calculated of soil surface reflectivity at a frequency of 3 and 30 MHz. This data were used to estimate of the soil’s effective dielectric permittivity and conductivity.

The results of modeling the antennas directional characteristics in the HF range are presented. In the process of modeling, the radiophysical characteristics of the underlying surface measured under laboratory conditions were taken into account. The simulation results are compared with the results of field measurements of the antennas radiation patterns.