Vol. 8, №2, 2016
РусскийEnglish

RADIOELECTRONICS


NONSTATIONARY REFLECTION OF A SUPERSHORT ELECTROMAGNETIC PULSES FROM THE LAYERED STRUCTURES
Aleksey V. Trofimov, Anatoly V. Kosar
Lomonosov Moscow State University, http://www.msu.ru
1/2, Leninskie gory, 119991 Moscow, Russian Federation
av.trofimov@physics.msu.ru, avk@phys.msu.ru

Received 13.12.2016
Abstract. . Is carried out the theoretical and numerical study of non-stationary reflection of short and supershort electromagnetic pulses from a single-layer and multilayer interference structures, created test bench to measure of non-stationary reflection amplitude-modulated signal from the layered structure. It is shown that the envelope of the reflected signal substantially changes its appearance in the presence of even small losses in the non-reflection layers of the multilayer structure, the amplitude reflection coefficient depends linearly on the magnitude of the losses. At low loss in the layers of structure the envelope can be approximately described by the derivative of the N-incident signal envelope. Obtained the exact and approximate formulas that allow to calculate the characteristics of the multilayer interference structure, highly reflective matching the load to the waveguide, the waveguide due to a strong dispersion. It is shown that in multilayer interference structures with strong waveguide dispersion there is a significant increase in the amplitude and duration of the pulses of non-stationary reflection.

Keywords: electromagnetic ultrashort pulses of microwave, layered structure with strong losses and waveguide dispersion, transient reflectivity, the envelope of the reflected signal, highly reflective and load matching structure, multilayer interference filters

UDC 544.77, 53.098

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RENSIT, 2016, 8(2):107-130 DOI: 10.17725/rensit.2016.08.107
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