E.V. Mitrofanov - Post-graduate Student, Graduate Research Scientist, Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: mitrofanov_ireran@mail.ru V.A. Vdovin - Ph. D. (Phys.-Math.), Leading Research Scientist, Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: vdv@cplire.ru V.V. Kulagin - Ph. D. (Phys.-Math.), Senior Research Scientist, Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: victorvkulagin@yandex.ru V.A. Cherepenin - Dr. Sc. (Phys.-Math.), Professor, Corresponding Memeber of RAS, Deputy Director of Kotel\'nikov Institute of Radioengineering and Electronics of RAS. E-mail: cher@cplire.ru

This article presents experimental results received with laboratory radar model which utilizes nanosecond probe radiopulses (minimal duration down to 1.5 ns) at 10 GHz carrier frequency. The experiments on scanning of a model object under various viewing angles using radiopulses of different duration (1.5 ns, 3 ns and 6 ns) are demonstrated. Experimental results are presented on the graphs in coordinates «angle - time delay». The work presents numerical model based on Huygens-Fresnel principle which allowed us to quali-tatively explain the experimental results. The shape of reflected signal is investigated in dependence of nanosecond probe radiopulse duration and properties of located object. Scattered points (two end-points) of an object probed by radiopulses of 1.5 ns duration were resolved on time and the shape of reflected signal corresponds to two pulses diversed on time scale. Reflections of scattered points begin to fuse and radio wave imaging becomes imposible with increase of probed radiopulse duration.

 

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