Zobrazeno 1 - 10
of 168
pro vyhledávání: '"Pavel HAZDRA"'
Autor:
Michal Pokorny, Ivo Vertat, David Panek, Pavel Hazdra, Milan Svanda, Jan Kracek, Milos Mazanek, Jiri Masopust, Pavel Karban
Publikováno v:
IEEE Access, Vol 12, Pp 11458-11469 (2024)
Contemporary beam-forming antenna arrays often use a large number of individual elements, sometimes hundreds or more, to achieve high gain for advanced applications like radar, space communication, and next-gen cellular networks. These arrays are com
Externí odkaz:
https://doaj.org/article/132bf374bdca4c7e9f798d0ff84f9b1a
Publikováno v:
The Journal of Engineering, Vol 2021, Iss 9, Pp 496-499 (2021)
Abstract In this paper, design of a prime‐focus feed for a deep reflector, Earth–Moon–Earth space communication system is described. The feed is based on a circular waveguide equipped with two chokes in order to minimise sidelobes and illuminat
Externí odkaz:
https://doaj.org/article/68c67be2e8de43e2b9e7e59bf6deea58
Autor:
Mojtaba Mansour Abadi, Pavel Hazdra, Jan Bohata, Petr Chvojka, Paul Anthony Haigh, Zabih Ghassemlooy, Stanislav Zvanovec
Publikováno v:
IEEE Access, Vol 8, Pp 135722-135729 (2020)
With the emergence of the fifth generation and beyond mobile networks, both visible light communications (VLC) and radio frequency (RF) or millimetre wave (mmW) systems are expected to maintain the connectivity in various environments. In outdoor env
Externí odkaz:
https://doaj.org/article/34ca5db80d2745e9aa761b0c2b8ca4b8
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
The chosen rectangular and fractal microstrip patch antennas above an infinite ground plane are analyzed by the theory of characteristic modes. The resonant frequencies and radiation Q are evaluated. A novel method by Vandenbosch for rigorous evaluat
Externí odkaz:
https://doaj.org/article/cc17de1a932b4108a7eaf42b57805820
Publikováno v:
International Journal of Antennas and Propagation, Vol 2012 (2012)
We propose a novel, compact, prime-focus antenna feed for space communication. The feed requires full-wave simulator optimization for a given parabolic reflector and is designed to operate simultaneously on two bands, offering LHC/RHC polarizations f
Externí odkaz:
https://doaj.org/article/b5d44cc891da43fb8904dd96e4350181
Publikováno v:
IEEE Transactions on Electron Devices. 68:202-207
The different effect of displacement damage produced by neutron irradiation on the static characteristics of 4.5-kV silicon and 4H silicon carbide (SiC) p-i-n power diodes is explained using deep level transient spectroscopy (DLTS), ${C}$ – ${V}$ p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e106b3b3030aee9a05a64c098f3afa2
https://doi.org/10.1109/ted.2020.3038713
https://doi.org/10.1109/ted.2020.3038713
Autor:
Pavel Hazdra, Michal Cerveny
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 19:1674-1678
There are many applications where the reception of global navigation satellite system (GNSS) signals is crucial. In such cases, the capability to reduce the interference (both unintentional or hostile) is critical. The proposed sector antenna offers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d11721ee0c384f2041a1281a4c1c9ab9
https://doi.org/10.1109/lawp.2020.3013910
https://doi.org/10.1109/lawp.2020.3013910
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 19:902-906
The theory of superdirective antenna arrays was discussed. The procedure for finding the excitation currents of fixed-geometry arrays, which maximizes the directivity, termed as superdirectivity, for a given direction and polarization, was described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f519a1ae37570fa6b6f0963275054e33
https://doi.org/10.1109/lawp.2020.2981533
https://doi.org/10.1109/lawp.2020.2981533
Autor:
Jan Bohata, Zabih Ghassemlooy, Pavel Hazdra, Petr Chvojka, Paul Anthony Haigh, Stanislav Zvanovec, Mojtaba Mansour Abadi
Publikováno v:
IEEE Access, Vol 8, Pp 135722-135729 (2020)
With the emergence of the fifth generation and beyond mobile networks, both visible light communications (VLC) and radio frequency (RF) or millimetre wave (mmW) systems are expected to maintain the connectivity in various environments. In outdoor env
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2581672f57d16cbed1370a0d4e7439f
https://ieeexplore.ieee.org/document/9133057/
https://ieeexplore.ieee.org/document/9133057/
Publikováno v:
NANOCON Conference Proeedings.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::989faf47a1e33e4eaa12acc220a314eb
https://doi.org/10.37904/nanocon.2022.4588
https://doi.org/10.37904/nanocon.2022.4588