V. Karazin National University of Kharkov,
4, Svoboda Sq., Kharkiv, 61077, Ukraine
Complex Permittivity of Disperse Heterogeneous Systems and Their Components
The relationship between complex permittivity of two-component disperse system, volume parts and permittivity of its components is obtained. The method for calculation of volume parts and permittivity of hydrated inclusions in water solution is suggested.
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
On the Possibility for Total Conversion of the ÒE1-Wave into ÒE2- or ÒE3-Wave on the Cascade of Three Strip Diaphragms
Resonant states of wave scattering on a cascade of dissimilar thin multistrip diaphragms in a regular (rectangular or round) waveguide have been investigated. The possibility of the total energy conversion of the fundamental ÒÅ1 wave into the ÒÅ2- or ÒÅ3 wave by three diaphragms has been proved (including the obtaining of flat-topped frequency characteristics of mode conversion). Nontrivial retunings of the cascade into the pure inverse conversion have been found.
Algorithm for Analysis of a Modular Structure of the JPEG Format Image, Modified by Steganographic Embedment, and Determination of the Number of Variations
New Countermeasures Against Side-Channel Attacks for Cryptography on Elliptic Curves
Fail-Safe Model of Interaction of Autonomous Systems in Global Network
Basic Wave Components Forming a Radio Field in a Hotel-Type Building
Disadvantages of Modern Intrusion Detection Systems
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
Application of Disk-Containing Quasioptical Dielectric Cavity Resonators for Investigating Two-Component Aqueous Solutions in Small Volumes
The paper presents results of experimental investigations of quasi-optical disk-containing dielectric cavity resonators with the capillary filled by a binary solution based on a lossy liquid component (water). Ethanol and acetone were used as the second component of the solution. As has been found, many features of the cavity’s eigenfrequency and Q-factor dependences upon concentration of one of the solution components which were measured for the water-ethanol solution, are well correlated with calculated values of the dielectric constant. The measurements were conducted at the frequencies 37 to 40GHZ for the HE whispering-gallery mode excited in the cavity. The investigated cavity resonator could be used as a cell for measuring characteristics of solutions in small volumes.
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura Str., Kharkiv 61085, Ukraine
Errors of Determination of Complex Permittivity by the Method of Open-Ended Coaxial Line
Errors of determination of complex permittivity of a dissipative medium by the method of open-ended coaxial line are studied. The errors arise due to imperfect adequacy of used mathematical models for real probe geometry and its location in relation to a medium under probing.