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The paper deals with the antenna system of Vivaldi type for a ground penetrating radar (GPR), which is optimized for using ultrawideband pulse signals of subnanosecond range. Results of development and experimental investigation of characteristics of the antenna and the entire GPR antenna system have experimentally demonstrated the possibility of detection and localization of subsurface cracks in...
Forming ultrawideband (3.2∶1) end-fire radiation mechanism of a low profile dipole-slot antenna backed by a ground plane at wavelengths close to the distance of 0.5λ from the plane are considered. It has been shown that at this frequencies the dipole-slot radiation differential phase shift in forward-backward directions is close to 180°. Therefore, the radiation of the dipole-slot antenna is summarized...
The results of experimental research of low-cost ultrawideband antennas composed of printed basic elements are presented. Photos of the antennas are shown. Diagrams of the spatial field distribution are investigated.
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