Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Z. Lukes"'
Publikováno v:
Radioengineering, Vol 20, Iss 4, Pp 790-803 (2011)
In the paper, we try to provide a comprehensive look on a multi-objective design of radiating, guiding and reflecting structures fabricated both from special materials (semiconductors, high-impedance surfaces) and conventional ones (microwave substra
Externí odkaz:
https://doaj.org/article/800a168c407448c5b63e471bbf407bc3
Publikováno v:
Radioengineering, Vol 17, Iss 2, Pp 98-107 (2008)
In this paper the ray-launching method is developed and used for the modeling of a rotational spectrometer. Since the electrical size of the spectrometer is several thousands times longer compared to the wavelength, the presented approach is much sui
Externí odkaz:
https://doaj.org/article/3053d91d0f944231973b4bf0dce9ebc2
Publikováno v:
Radioengineering, Vol 15, Iss 4, Pp 91-95 (2006)
In the paper, dielectric and metallic lenses are modeled and optimized in order to enhance the gain of a horn antenna in the frequency range from 60 GHz to 100 GHz. Properties of designed lenses are compared and discussed. The structures are modeled
Externí odkaz:
https://doaj.org/article/024ece78192a4111ad1c1121275ec215
Multi-Objective Optimization of Wire Antennas: Genetic Algorithms Versus Particle Swarm Optimization
Publikováno v:
Radioengineering, Vol 14, Iss 4, Pp 91-97 (2005)
The paper is aimed to the multi-objective optimization of wiremulti-band antennas. Antennas are numerically modeled using time-domainintegral-equation method. That way, the designed antennas can becharacterized in a wide band of frequencies within a
Externí odkaz:
https://doaj.org/article/f65fc0e1cc6d4069abb2643dc2afd025
Publikováno v:
Radioengineering, Vol 13, Iss 2, Pp 3-11 (2004)
The paper describes the exploitation of feed-forward neural networksand recurrent neural networks for replacing full-wave numerical modelsof microwave structures in complex microwave design tools. Building aneural model, attention is turned to the mo
Externí odkaz:
https://doaj.org/article/05d7340a34ea4fbc92701a66fb9d5d89
Publikováno v:
Microwave and Optical Technology Letters. 52:1043-1046
In this article, a novel design of a millimeter-wave antenna array consisting of linearly tapered slotline antenna elements is presented. The antenna array was designed for the frequency range from 50 to 600 GHz. A numerical model of the antenna arra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2458306787b319af30ec8789db451b5
https://doi.org/10.1002/mop.25110
https://doi.org/10.1002/mop.25110
Publikováno v:
2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011).
In the paper, the design and simulation of a transmit antenna system with vertical polarization is discussed. The antenna is designed for television broadcasting services. The improvement of antenna properties is achieved by using a special balun wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64cf925bf8d7f26ac6bd0879cfaae8ff
https://doi.org/10.1109/comcas.2011.6105785
https://doi.org/10.1109/comcas.2011.6105785
Publikováno v:
2011 International Conference on Electromagnetics in Advanced Applications.
In the proposed paper, novel types of genetic algorithms are used as the global optimization method to seek the geometry of ultra-band planar directional antenna. The global optimization method is real codes genetic algorithms SPX-PNX used for accura
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57e7d7f7dd4ef9f2cf26cb0d695348a2
https://doi.org/10.1109/iceaa.2011.6046466
https://doi.org/10.1109/iceaa.2011.6046466
Publikováno v:
Proceedings of 21st International Conference Radioelektronika 2011.
The paper deals with a unit of broadband transmitting antenna used for digital TV broadcasting. The unit of antenna consists of four vertically oriented dipoles. The improvement of antennas parameter is achieved by replacing cylindrical dipoles by bo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a36bc33fb8f1b589e9493ffc7b637479
https://doi.org/10.1109/radioelek.2011.5936475
https://doi.org/10.1109/radioelek.2011.5936475
Publikováno v:
2010 International Conference on Electromagnetics in Advanced Applications.
In the proposed paper, a novel types of genetic algorithms are used as a global optimization method to seek the geometry of ultra-band discone antenna with Koch motive. The global optimization method is real codes genetic algorithms SPX-PNX used for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e05ad90a67b51343d8691ed194e709e
https://doi.org/10.1109/iceaa.2010.5653775
https://doi.org/10.1109/iceaa.2010.5653775