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The work is devoted to the development of new radiophysical methods for diagnostics of the lower ionosphere by analyzing pulse signals of natural origin in the ELF — VLF frequency range propagating in the Earth — ionosphere waveguide — tweek-atmospherics (tweeks). The effective height of the first waveguide mode has been shown to be usually higher than the effective height of the second waveguide...
The investigation of shielded dielectric resonators on the base of the dielectric resonant structures with high Q-factor and improved spectral characteristics is the aim of this work. The thesis is article to the solving of the effective excitation of the whispering gallery modes in the shielded quasioptic dielectric resonators by the using of a planar waveguide.
Generated by fulminant discharges and propagating in the Earth-ionosphere waveguide tweek-atmospherics are often used to tracking the heights variations of the lower ionosphere over geographically large areas. Recorded by our sensors in the city of Kharkiv tweeks were analyzed, and preliminary results are presented in this paper. A sufficiently accurate lightning centers coordinates determination...
The present time of universal communication gives rise to train students in their special subjects using English. That is why Department of Microelectronics of NTUU “KPI” edited several textbooks in electronic materials sciences in English. The contents of these books take into account extremely rapid progress in field of electronics to reflect latest achievements. Moreover, for undergraduate student,...
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