V. V. Alekseev

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The experimental results of measurements of electromagnetic wave reflection for some specimens of water foam for various time of their existence in free space for frequency range 38-52 GHz are presented. Thickness of specimens was 80 mm, the range of foaming ratio was from 69 till 173. It was possible to select separately the reflections from the front and(More)
The techniques of microwave measurements combining multifrequency measurements and transversal scanning for objects located behind dielectric layer are presented. Some radar images of simple objects such as cylinders are presented. The images were obtained by synthesizing in real time the distance dependencies of reflectivity using data of multifrequency(More)
The results of microwave measurements for some objects combining multifrequency measurements and transversal scanning is presented. Longitudinal distance dependencies of reflectivity have been obtained by synthesis from multifrequency data. The multifrequency measurements and synthesis have been done in real-time. The measurements in free space were carried(More)
The experimental results have shown possibility to detect signal of plexiglass cylinder situated behind plexiglass slab using multifrequency measurements with synthesizing of 2-D spatial images. This approach has advantages in comparison with single-frequency method.
Description of a microwave introscope combining multifrequency measurements and transversal scanning is presented. Longitudinal distance dependencies of reflectivity are obtained by synthesis from multifrequency data. The multifrequency measurements and synthesis is done in real-time. The apparatus carries out the measurements in free space and is(More)
In recent years, there has been a great deal of interest in artificial materials that have negative group delay. This effect can be observed in waveguide structures with resonance elements or in periodic structures made up of split-ring resonators [1] in regions of anomalous dispersion. For radar applications, it is naturally to use the materials of the(More)
Description of a microwave introscope combining multifrequency measurements and transversal scanning is presented. Longitudinal distance dependencies of reflectivity are obtained by synthesis from multifrequency data. The multifrequency measurements and synthesis is done in real-time. The apparatus carries out the measurements in free space. It is assembled(More)
Description of experimental facilities for measurements of attenuation and phase shift in water-drop formation is presented. The experimental technique is based on multifrequency wideband measurements with synthesis of signal of spatial distribution of reflection along longitudinal axis and traditional scheme of transmission coefficient measurements. The(More)
This paper gives the results of estimation of negative group delay for structure of disk metal implants immersed into a dielectric host. The frequency band of resonance phenomenon has been detected. The measurements have been carried out in frequency range of 38–52 GHz. Synthesized time-domain signals have been obtained on base of holographic(More)
Influence of microwave radiation on some immunological indexes of practical healthy people is studied. An index of T-cells immune system, an index of B-cells and serum - transferable immunity are investigated. An ingestion reaction and a bacillicidal activity of peripheral blood are studied.