Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Fedor F. Dubrovka"'
Autor:
Fedor F. Dubrovka, Stepan Piltyay
Publikováno v:
Radioelectronics and Communications Systems. 63:619-632
This paper presents a new ultrawideband omnidirectional microwave biconical antenna having gain above 10 dB that has been proposed, developed, optimized and experimentally tested. The main feature of the developed biconical antenna is its possible us
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b30b4d305b237d442807704af700f236
https://doi.org/10.3103/s0735272720120018
https://doi.org/10.3103/s0735272720120018
Autor:
Fedor F. Dubrovka, O. I. Pavlov
Publikováno v:
Radioelectronics and Communications Systems; Vol. 63 No. 9 (2020); 449-464
Radioelectronics and Communications Systems; Том 63 № 9 (2020); 449-464
Radioelectronics and Communications Systems; Том 63 № 9 (2020); 449-464
The paper presents the results for estimating the potential coding efficiency of spectrum envelope waveform (SEW) of speech signals (SS) by using the linear prediction (LP) method and using different sets of alternative equivalent parameters (AEP) th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c96f9159623afa172554a1e8116f5b4
https://doi.org/10.3103/s0735272720090010
https://doi.org/10.3103/s0735272720090010
Publikováno v:
Radioelectronics and Communications Systems; Vol. 64 No. 2 (2021); 80-91
Radioelectronics and Communications Systems; Том 64 № 2 (2021); 80-91
Radioelectronics and Communications Systems; Том 64 № 2 (2021); 80-91
This paper proposes a solution of the electrodynamic problem of determining the generalized scattering matrix of infinitely thin asymmetric one-sided inductive diaphragm in rectangular waveguide using the integral equation method. The problem is redu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb603a1b07e054d40bf4dae9d1561ad7
http://radioelektronika.org/article/view/s0735272721020035
http://radioelektronika.org/article/view/s0735272721020035
Autor:
Roman Dubrovka, Oleksandr Sushko, Fedor F. Dubrovka, Mykola Lytvyn, Serhii Lytvyn, Stepan Piltyay
Publikováno v:
2020 IEEE Ukrainian Microwave Week (UkrMW).
This paper presents the results of development of a X-band compact stepped-thickness septum polarizer. All electromagnetic characteristics of the polarizer have been simulated and optimized numerically. A prototype of the polarizer has been designed,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2be427d073316cdd797eb5733ae4f1fe
https://doi.org/10.1109/ukrmw49653.2020.9252583
https://doi.org/10.1109/ukrmw49653.2020.9252583
Autor:
Roman Dubrovka, Oleksandr Sushko, Fedor F. Dubrovka, Serhiy Martunyuk, Yuriy A. Ovsianyk, Mykola M. Lytvyn, O. S. Zakharchenko, Stepan Piltyay, Serhiy Lytvyn
Publikováno v:
2020 IEEE Ukrainian Microwave Week (UkrMW).
This paper covers results of full wave analysis and optimization of electrical performance of key components of the multimode circularly polarised X-band monopulse feed, namely, the wideband circular corrugated horn supporting propagation of hybrid m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c669e4dd12a77ecb1a9a90d434835a51
https://doi.org/10.1109/ukrmw49653.2020.9252600
https://doi.org/10.1109/ukrmw49653.2020.9252600
Publikováno v:
Radioelectronics and Communications Systems; Том 63, № 1 (2020); 15-23
The numerical optimization results of constant thickness septum polarizer’s performances for various operating fractional bandwidths (FBW) are presented in the paper. The polarizer’s structure includes a common input square waveguide, a constant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a854934ad9e3a18478c9b92129a7364
http://radioelektronika.org/article/view/S0735272720010021
http://radioelektronika.org/article/view/S0735272720010021
Publikováno v:
Thermal Science and Engineering Progress. 17:100499
About 70% of the energy consumed by the T/R module is dissipated as heat and leads to poor performance and reliability of the antenna system. The problem of heat removal from T/R modules is thus an acute one. This paper presents the results of numeri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c286e9c5edcf9910ccf956285a4d654
https://doi.org/10.1016/j.tsep.2020.100499
https://doi.org/10.1016/j.tsep.2020.100499
Autor:
A.V. Baranyuk, S. A. Reva, E.N. Pis′mennyi, Yu. E. Nikolaenko, V.A. Rohachov, Fedor F. Dubrovka
Publikováno v:
Thermal Science and Engineering Progress. 14:100418
Increasing the cooling efficiency of T/R modules is an important problem in the process of designing active phased array antennas. In this study, the authors use numerical simulation to study the ways of increasing the air cooling efficiency of a T/R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d34df204384c895ebd0dc2e329ebdc4
https://doi.org/10.1016/j.tsep.2019.100418
https://doi.org/10.1016/j.tsep.2019.100418
Publikováno v:
2017 XI International Conference on Antenna Theory and Techniques (ICATT).
A new robust design of the printed phased antenna array was developed and investigated. Results of numerical prediction of radiation, matching and scanning characteristics of a single printed bow-tie antenna and a new design of phased antenna array c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3610ab5afc516eb038008c6f94798c95
https://doi.org/10.1109/icatt.2017.7972607
https://doi.org/10.1109/icatt.2017.7972607
Autor:
Fedor F. Dubrovka, Stepan Piltyay
Publikováno v:
2017 XI International Conference on Antenna Theory and Techniques (ICATT).
In this paper we present the design and simulated characteristics of a novel high performance coherent orthomode transducer to be used in dual-wideband coaxial horn feeds of reflector antennas with polarization diversity or polarization processing of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d5d5d53f0801ecfaf22575bbfb3ed179
https://doi.org/10.1109/icatt.2017.7972642
https://doi.org/10.1109/icatt.2017.7972642