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Browsing Research Outputs | WoS | Scopus | Thesis | PubMed | TR-Dizin by Author "Berdiyev, Alisher"

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    Comprehensive Study on the Design and Optimization of Log-Periodic Antennas for Ultrahigh Frequency Telecommunication Systems
    (IEEE Computer Society, 2024) Gubenko, V.A.; Berdiyev, A.A.; Aripova, U.Kh.; Alimuhammedova, M.E.; Department of Teleradiobroadcasting systems
    The main component of modern wireless telecommunications networks is the log-periodic antenna, which is designed to operate at high frequencies. It meets the requirements of modern high-frequency technologies and provides reliable and efficient data transmission in a given frequency range. The wide range of operating frequencies and high directionality make the log-periodic antenna an ideal choice for modern telecommunication communication systems. The log-periodic antenna is capable of efficiently transmitting signals over long distances and ensuring stable communication in changing radio frequency environments. In this article, we will explore research findings concerning the modeling of electrical parameters and directional characteristics of antennas operating in the ultra-high frequency range. This exploration involves augmenting the quantity of wideband log-periodic antenna elements utilized in wireless communication systems, altering the material composition of such antennas, and varying the operational environment. The process of designing an antenna device using computer software can be divided into the following main stages: problem formulation, structural synthesis, mathematical modeling and analysis of electrical properties, parameter optimization, and analysis of the antenna's radiation pattern. The scientific research was modeled using the MMANA-GAL program within the frequency range of 450-870 MHz. This program facilitates the easy preparation of information for calculations and analysis of results. Both text and graphical modes were utilized for constructing the antenna model and displaying the program's outcomes. © 2024 IEEE.
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    Development of Optoelectronic Control Measurement System Based on Attenuated Total Reflectance Effect
    (IEEE Computer Society, 2024) Rakhimov, B.N.; Kengesbayev, S.K.; Berdiyev, A.A.; Department of Teleradiobroadcasting systems
    This paper delves into the refractometric methodology for monitoring liquid media within the infrared spectrum, presenting a pioneering design of an optoelectronic system anchored on an attenuated total reflectance element. The proposed system exhibits heightened sensitivity, tailored for precise analysis of optical parameters of liquid media products. Utilizing key components such as light-emitting diodes, a cuvette, the attenuated total reflectance element, and an optical detector, this system epitomizes versatility and efficacy across diverse applications. Through the integration of attenuated total reflectance elements, researchers and engineers can develop highly sensitive instruments, facilitating non-destructive testing, chemical analysis, and environmental monitoring. The inherent flexibility in such systems enables customization to meet specific measurement requirements, ranging from industrial process monitoring to medical diagnostics, by adjusting parameters like angle of incidence, light wavelength, and optical material selection. This paper contributes to advancing optoelectronic control measurement systems, offering enhanced capabilities for accurate and reliable assessment of liquid media properties in various fields. © 2024 IEEE.