Jakub Urbanský

Technical University of Košice

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Michal Márton

Technical University of Košice

Ján Turán

University of Novi Sad

ĽO

Ľuboš Ovseník

Technical University of Košice

MŠ

Michal Špes

Technical University of Košice

ĽB

Ľubomír Beňa

Technical University of Košice

Anastázia Margitová

Technical University of Košice

Juraj Kurimský

Technical University of Košice

Iraida Kolcunová

Technical University of Košice

Martin Kanálik

Technical University of Košice

Ján Zbojovský

Technical University of Košice

Cooperative Institutions

Technical University of Košice

nLIGHT (United States)

Rzeszów University of Technology

Slovak University of Technology in Bratislava

Mylan (Switzerland)

University of Technology

Technical University of Liberec

Weatherford College

Slovak Academy of Sciences

Institute of Experimental Physics of the Slovak Academy of Sciences

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Comparison of Helix Antennas Operated on 2.4, 5.2 and 9.2GHz for FSO/RF Hybrid System

Michal Márton Ľuboš Ovseník Ján Turán Michal Špes Jakub Urbanský

Communication technologies have the dominant effect to human lives. We are surrounded by these technologies in personal and professional lives too. Digitalization sets the trend in all these areas. Communication technologies easy the fulfillment of our tasks in professionals areas and open the next door of possibilities of spending our free time. Responsibility that was on human, is today directly on end devices. The expansion of these technologies is so significant that it has almost negative impact on human lives. In many cases, we are slaves of technologies. Requirements of users on availability of communication technologies are still growing and we have to offer the solution. Optical fiber communication systems create the backbone of high speed communication systems. We are focused on using optical communication systems without needs of optical fiber. Free Space Optics (FSO) systems offer comparable transmission rates as optical fibers communication systems. The main drawback of FSO technologies is sensitivity to weather changes, so we have to design appropriate radio-frequency (RF) backup link. Analysis of the appropriate type of helix antenna is the point of this paper. We designed three models of helix antennas operating on three different frequencies from non-licensed frequency range.

Free-Space Optical Communication

10.1109/radioelek.2019.8733494

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Citations (3)

Radio Frequency Response of Magnetic Nanoparticle-Doped Yarn

Acta Physica Polonica A (2020)

Bystrík Dolník Michal Rajňák Roman Cimbala Iraida Kolcunová Juraj Kurimský

The amount of research with electrospun nanofibers in various fields of science and their use in engineering applications is increasing rapidly.The commercial use of nanofibre technology is intensively investigated mainly in the field of water treatment and environmental remediation, health and biomedical engineering, and energy production and storage.Therefore, a wide range of base materials has been used to synthesize nanofibers with various physical properties.This paper presents the results of experiments on the shielding effectiveness against electromagnetic fields using yarns.The yarns were produced using AC electrospinning based on a needleless spinning-electrode.The optimal frequency of 50 Hz and a high voltage of 40 kV were used to generate the yarn.The poly(vinylbutyral) was chosen as a polymer.Nanoparticles of Fe3O4 were used as the filler.Transmission electron microscopy confirmed good compatibility of the nanoparticles with polymeric nanofibers.The presence of the magnetic dopant in the nanofibers was also reflected in measured magnetization curves.Measurements of Fe3O4 nanoparticle-doped yarn shielding effectiveness in the frequency range from 700 MHz to 3 GHz confirmed a slight shielding effect.

10.12693/aphyspola.137.687

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Citations (7)

Calculation of the overhead transmission line conductor temperature in real operating conditions

Electrical Engineering (2020)

Ľubomír Beňa Vladimír Gáll Martin Kanálik Michal Kolcun Anastázia Margitová

Operating temperature

Ampacity

Overhead line

Power transmission

10.1007/s00202-020-01107-2

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Citations (24)

The impact of reconfiguration on power losses in smart networks

Daniel Pál Ľubomír Beňa Jakub Urbanský Maksym Oliinyk

There is quite a lot of losses in electricity transmission, because is produced in large power plants that are located at great distances from end-users. About 10% of the energy is lost during transmission. Power losses depend on climatic conditions, parameters, and network configuration. Some can be influenced, some not. Climate conditions cannot be influenced, but network topology can be changed. This article focuses on the use of controlled switching and reconfiguration divisional switches on power lines to influence the power losses in the network.

Control reconfiguration

Transmission network

Power transmission

10.1109/epe51172.2020.9269189

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Comparison of Microstrip Patch Antennas with Different Materials Operating on 2.46GHz for FSO/RF Hybrid System

Michal Márton Ľuboš Ovseník Ján Turán Michal Špes Jakub Urbanský

The requirements on the communication systems grow exponentially with number of users. Network providers must react to this trend and find the new way to increase the availability of the services. The majority of the current communication systems were improved by the process of optimization. Some network elements were replaced by adequate replacement. The standard fiber optical communication networks were also modified over the time of use. Free Space Optics (FSO) system is an innovative concept of communication system which should directly replace standard fiber optical systems. The signal transmission in FSO system is based on free propagation through the atmosphere. The optical signal is sensitive to inhomogeneities in the atmosphere. To ensure the availability of 99.999% we developed the backup radio-frequency (RF) link. This backup link is based on microwave transmission. In this paper, the design of patch antenna made out of three different materials (FR04, RO4000 and RT6002) is presented. Because each of the proposed material is characterized by different value of relative permittivity, which affects the performance of antenna, we provide the comparative analysis of electromagnetic compatibility in FEKO software.

FEKO

Microwave transmission

Electromagnetic Compatibility

Free-Space Optical Communication

10.1109/carpathiancc.2019.8765926

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Citations (1)

COMPARISON OF MICROSTRIP PATCH ANTENNAS OPERATED ON 2.45GHZ

Acta Electrotechnica et Informatica (2019)

Michal Márton Ľuboš Ovseník Ján Turán Michal Špes Jakub Urbanský

Nowadays we are living in the ages of innovations.The expansions of communication systems is unbelievable.Many of devices recent are based on database and cloud systems.They need to be connected with other devices and services provider.Well known types of transmission are radio frequency (RF) and optical systems.They use different access for communication.In case of RF systems is need in/out device proposed to receiving/sending of signals.Now are available the many of types of antennas.They are divided by purpose, shape, material, value of radiated power, gain and price.For each purpose is appropriate different type of antenna.The low cost type of antenna is microstrip patch antenna.They are represented by different shapes and materials.Microstrip patch antenna contains the layer of substrate placed between two conduct layers.Parameters of antenna could be affected by change of relative permittivity of substrate.Nowadays are available many of high frequency materials with low value of relative permittivity.The point of this paper is comparison of two types of microstrip patch antennas witch different shapes of radiation patch.

Patch antenna

10.15546/aeei-2019-0019

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Design of Microstrip Patch Antennas Operating on 2.45 GHz in HFSS and FEKO

Michal Márton Ľuboš Ovseník Ján Turán Tomáš Huszaník Jakub Urbanský

Recent years are significantly affected by expansion of online services and their impact on human lives. People are inadvertently building addiction to technologies. Their lives shown different levels of addictions. With these problems are joined unwanted impacts. They need a lot of devices which each of them is able communicate. On the other hand of signals availability is the electromagnetic smog very dangerous. We are surrounding by a lot of radiation sources. These are build continually with regards on networks availability and high speed connections. 5G networks combine the many of technologies, communication protocols and standards. This paper is focused on design of microstrip patch antennas in two different professional software which are proposed for analysis of electromagnetic compatibility.

FEKO

HFSS

Electromagnetic simulation

10.1109/informatics47936.2019.9119331

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Citations (1)

Comparison of Microstrip Patch Antennas with Different Materials Operating on 2.46GHz for FSO/RF Hybrid System

IEEE Conference Proceedings (2019)

Michal Márton Ovsenik Lubos Turan Jan Michal Špes Jakub Urbanský

Patch antenna

Source

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Design of Helix Antenna for 9.2GHz in FEKO for FSO/RF Hybrid System Focused on Height of Helix

Carpathian Journal of Electronic and Computer Engineering (2018)

Michal Márton Ľuboš Ovseník Ján Turán Michal Špes Jakub Urbanský

Abstract Nowadays we are living in the ages of expansion of communication. The young generation depends on the online communications with other. Each of the devices is purposed to communication. Cloud data storage systems are available only with stable connection. Requirements are growing up to date. The answer on these requirements: the high speed of transmission, high level of security and wide bandwidth are optical communication systems. This system offers comparable features as optical system with physical optical fibers. But it has one big drawback. It is sensitivity to weather changes. We have to make backup link for case of outages. One part of design FSO/RF system in our case contains selection of appropriate type of RF antenna. We are looking for appropriate candidate. This paper is focused on analysis of helix antenna operating in non-licensed frequency range on 9.2GHz. The point of this paper is the examination of the impact of the height of helix designed antenna.

FEKO

Helical antenna

10.2478/cjece-2018-0010

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Citations (1)

Comparison of Electromagnetic Fields around Electric Power Lines

Dušan Medveď Ján Zbojovský Marek Pavlík Iraida Kolcunová Jakub Urbanský

The generation of electromagnetic fields is conditioned by the time-varying movement of the electric charge. Electromagnetic field is emitted to the surrounding by devices that operate with electric current and voltage. The calculation of electromagnetic fields is important for assessing possible health risks in human interaction. The increasing trend in the use of electricity is also associated with an increase in transmitted power and hence a higher level of electromagnetic fields. With this in mind, understanding the levels of electromagnetic fields and their impact on the human body is still relevant. For this reason is in this paper mentioned comparison of electromagnetic fields around 400 kV power lines various power towers. Simulations were realized in multi-physic software ANSYS.

Electromagnetic pulse

Electromagnetic Compatibility

Electromagnetic environment

10.1109/epe51172.2020.9269217

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Citations (2)