V.S. Temchenko

In this paper T-horn antenna characteristics and GPR route are taken into account on basis of electrodynamic modeling including electromagnetic transmit antenna field representation in equivalent elementary dipole system placed in aperture plane of antenna. In general case DMA parameters consist of dipole amount, coordinates, spatial orientation and complex moments, determined on basis of global optimization methods. Two methods of DMA parameters determination in GPR band are discussed. The first one is based on measurement results in near-field region and the second one calibration results are used. These results are obtained at registering signals in antenna port in transmit and receive modes for incident and reflected electromagnetic field produced by plane conductive screen. As a result the error between measured value of reflected field and it-s model approximation. Hence, TRA characteristics and GPR RF channel are taken into account on basis of electrodynamic antenna simulation represented in a system of equivalent elementary dipoles. This simulation includes radiated and reflected medium fields representation in a finite number of Е- and Н-plane waves. Such approach allows realizing adequate model of direct problem which has simple decision. This model also takes into account electromagnetic field propagating features and GPR characteristics.