Zobrazeno 1 - 10
of 26 245
pro vyhledávání: '"P. Kovācs"'
Autor:
P. Kovacs, J. Puskely
Publikováno v:
Radioengineering, Vol 22, Iss 1, Pp 318-322 (2013)
In this work we present a stacked high-impedance surface (HIS) for low-profile, high-gain, 5 GHz WLAN antennas. The structure consists of two layers: a lower mushroom layer and an upper planar layer. We demonstrate that the stacked geometry has much
Externí odkaz:
https://doaj.org/article/c3e8a4e24b9f4fcfb8ce1958c9f2ebc0
Autor:
P. Kovacs, T. Urbanec
Publikováno v:
Radioengineering, Vol 21, Iss 1, Pp 414-421 (2012)
In this paper we discuss the use of electromagnetic band gap (EBG) structures in antenna engineering from a practical point of view. Our aim is to point out the most common mistakes and myths related to design, analysis and application of EBGs in the
Externí odkaz:
https://doaj.org/article/34e227022559486d9fb1ebae6afee367
Autor:
L. Slama, J. Vorek, D. Wolansky, P. Kovacs, T. Mikulasek, J. Puskely, Z. Raida, J. Bartyzal, T. Bostik
Publikováno v:
Radioengineering, Vol 20, Iss 4, Pp 817-827 (2011)
In this paper, we give a comparative study of several planar antenna concepts for reliable long range links in a tactical environment. The antenna elements are studied in terms of their electrical properties (bandwidth, reflection coefficient and rad
Externí odkaz:
https://doaj.org/article/416f4abce782482a841a2239e7f413d5
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 19, Iss 1, Pp 122-128 (2010)
The paper is focused on the automated design and optimization of electromagnetic band gap structures suppressing the propagation of surface waves. For the optimization, we use different global evolutionary algorithms like the genetic algorithm with t
Externí odkaz:
https://doaj.org/article/67950e6726b348e397a30977a1007ba3
Publikováno v:
Radioengineering, Vol 17, Iss 4, Pp 19-24 (2008)
In the paper, the parametric analysis of a mushroom-like and a planar metallo-dielectric periodic structure with square unit cell and metallic patch is presented. First, the angular stability for different unit cell settings was studied. Second, rest
Externí odkaz:
https://doaj.org/article/7aa59c7ba3294465ab144074a1bacb00
Publikováno v:
Nonlinear Processes in Geophysics, Vol 9, Iss 2, Pp 149-162 (2002)
Preliminary results are presented which suggest that scaling and singularity characteristics of solar wind and ground-based magnetic fluctuations appear to be a significant component in the solar wind-magnetosphere interaction processes. Of key impor
Externí odkaz:
https://doaj.org/article/f7f8ff92cb8f477ca2e11e9110b4eec0
When the quark masses are lighter than those in QCD, the standard lore is that a chiral transition of first order must emerge for three, light flavors. Recently, however, numerical simulations on the lattice suggest that the chiral transition is of s
Externí odkaz:
http://arxiv.org/abs/2410.08185
In this paper, we study the cardinality of the smallest set of lines of the finite projective spaces $\operatorname{PG}(n,q)$ such that every plane is incident with at least one line of the set. This is the first main open problem concerning the mini
Externí odkaz:
http://arxiv.org/abs/2410.07937
Autor:
Csanády, Bálint, Nagy, Lóránt, Boros, Dániel, Ivkovic, Iván, Kovács, Dávid, Tóth-Lakits, Dalma, Márkus, László, Lukács, András
We present a purely deep neural network-based approach for estimating long memory parameters of time series models that incorporate the phenomenon of long-range dependence. Parameters, such as the Hurst exponent, are critical in characterizing the lo
Externí odkaz:
http://arxiv.org/abs/2410.03776